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/HiddenEqualityWithBranches.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 15:29:54,382 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 15:29:54,384 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 15:29:54,398 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 15:29:54,399 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 15:29:54,400 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 15:29:54,403 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 15:29:54,406 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 15:29:54,410 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 15:29:54,412 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 15:29:54,414 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 15:29:54,414 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 15:29:54,415 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 15:29:54,415 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 15:29:54,417 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 15:29:54,417 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 15:29:54,418 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 15:29:54,420 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 15:29:54,422 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 15:29:54,424 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 15:29:54,425 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 15:29:54,426 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 15:29:54,428 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-23 15:29:54,429 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 15:29:54,429 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 15:29:54,430 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 15:29:54,431 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 15:29:54,432 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 15:29:54,433 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 15:29:54,434 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 15:29:54,434 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 15:29:54,435 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-07-23 15:29:54,437 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 15:29:54,451 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 15:29:54,451 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 15:29:54,453 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 15:29:54,453 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 15:29:54,453 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 15:29:54,453 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 15:29:54,454 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 15:29:54,454 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 15:29:54,498 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 15:29:54,517 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 15:29:54,524 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 15:29:54,526 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 15:29:54,526 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 15:29:54,527 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl [2018-07-23 15:29:54,527 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl' [2018-07-23 15:29:54,577 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 15:29:54,579 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 15:29:54,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 15:29:54,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 15:29:54,580 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 15:29:54,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:29:54" (1/1) ... [2018-07-23 15:29:54,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:29:54" (1/1) ... [2018-07-23 15:29:54,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:29:54" (1/1) ... [2018-07-23 15:29:54,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:29:54" (1/1) ... [2018-07-23 15:29:54,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:29:54" (1/1) ... [2018-07-23 15:29:54,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:29:54" (1/1) ... [2018-07-23 15:29:54,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:29:54" (1/1) ... [2018-07-23 15:29:54,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 15:29:54,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 15:29:54,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 15:29:54,632 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 15:29:54,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:29:54" (1/1) ... [2018-07-23 15:29:54,723 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-07-23 15:29:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-23 15:29:54,724 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-23 15:29:54,940 INFO L258 CfgBuilder]: Using library mode [2018-07-23 15:29:54,942 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:29:54 BoogieIcfgContainer [2018-07-23 15:29:54,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 15:29:54,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 15:29:54,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 15:29:54,947 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 15:29:54,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:29:54" (1/2) ... [2018-07-23 15:29:54,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28504e3 and model type HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 03:29:54, skipping insertion in model container [2018-07-23 15:29:54,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:29:54" (2/2) ... [2018-07-23 15:29:54,952 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEqualityWithBranches.bpl [2018-07-23 15:29:54,962 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 15:29:54,971 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 15:29:55,021 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 15:29:55,022 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 15:29:55,022 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 15:29:55,022 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 15:29:55,022 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 15:29:55,022 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 15:29:55,023 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 15:29:55,023 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 15:29:55,023 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 15:29:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states. [2018-07-23 15:29:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-07-23 15:29:55,047 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:55,050 INFO L353 BasicCegarLoop]: trace histogram [1, 1] [2018-07-23 15:29:55,051 INFO L414 AbstractCegarLoop]: === Iteration 1 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:55,056 INFO L82 PathProgramCache]: Analyzing trace with hash 979, now seen corresponding path program 1 times [2018-07-23 15:29:55,062 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:55,117 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 15:29:55,120 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:29:55,123 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-07-23 15:29:55,127 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 15:29:55,139 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 15:29:55,140 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:29:55,142 INFO L87 Difference]: Start difference. First operand 4 states. Second operand 3 states. [2018-07-23 15:29:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:55,173 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-07-23 15:29:55,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 15:29:55,175 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-07-23 15:29:55,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:55,188 INFO L225 Difference]: With dead ends: 7 [2018-07-23 15:29:55,188 INFO L226 Difference]: Without dead ends: 4 [2018-07-23 15:29:55,192 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:29:55,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-07-23 15:29:55,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-07-23 15:29:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-07-23 15:29:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-07-23 15:29:55,229 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-07-23 15:29:55,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:55,229 INFO L471 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-07-23 15:29:55,229 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 15:29:55,230 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-07-23 15:29:55,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-07-23 15:29:55,230 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:55,230 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-07-23 15:29:55,231 INFO L414 AbstractCegarLoop]: === Iteration 2 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:55,231 INFO L82 PathProgramCache]: Analyzing trace with hash 30584, now seen corresponding path program 1 times [2018-07-23 15:29:55,231 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:55,256 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 15:29:55,256 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:55,257 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2018-07-23 15:29:55,261 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:29:55,261 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:29:55,263 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:29:55,264 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-07-23 15:29:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:55,294 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-07-23 15:29:55,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:29:55,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-07-23 15:29:55,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:55,298 INFO L225 Difference]: With dead ends: 6 [2018-07-23 15:29:55,298 INFO L226 Difference]: Without dead ends: 5 [2018-07-23 15:29:55,300 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:29:55,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-07-23 15:29:55,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-07-23 15:29:55,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-07-23 15:29:55,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-07-23 15:29:55,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-07-23 15:29:55,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:55,303 INFO L471 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-07-23 15:29:55,303 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:29:55,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-07-23 15:29:55,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-23 15:29:55,304 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:55,304 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-07-23 15:29:55,305 INFO L414 AbstractCegarLoop]: === Iteration 3 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:55,306 INFO L82 PathProgramCache]: Analyzing trace with hash 948339, now seen corresponding path program 2 times [2018-07-23 15:29:55,306 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:55,356 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 15:29:55,357 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:55,357 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-23 15:29:55,357 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 15:29:55,358 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 15:29:55,358 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:29:55,358 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-07-23 15:29:55,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:55,370 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-07-23 15:29:55,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 15:29:55,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-07-23 15:29:55,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:55,374 INFO L225 Difference]: With dead ends: 7 [2018-07-23 15:29:55,374 INFO L226 Difference]: Without dead ends: 6 [2018-07-23 15:29:55,375 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 15:29:55,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-07-23 15:29:55,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-07-23 15:29:55,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-07-23 15:29:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-07-23 15:29:55,379 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-07-23 15:29:55,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:55,380 INFO L471 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-07-23 15:29:55,380 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 15:29:55,380 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-07-23 15:29:55,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-07-23 15:29:55,380 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:55,381 INFO L353 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-07-23 15:29:55,381 INFO L414 AbstractCegarLoop]: === Iteration 4 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:55,381 INFO L82 PathProgramCache]: Analyzing trace with hash 29398744, now seen corresponding path program 3 times [2018-07-23 15:29:55,381 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:55,425 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 15:29:55,425 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:55,425 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:29:55,426 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:29:55,426 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:29:55,426 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:29:55,427 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-07-23 15:29:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:55,442 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-07-23 15:29:55,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:29:55,442 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-07-23 15:29:55,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:55,443 INFO L225 Difference]: With dead ends: 8 [2018-07-23 15:29:55,443 INFO L226 Difference]: Without dead ends: 7 [2018-07-23 15:29:55,444 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 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 15:29:55,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-23 15:29:55,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-23 15:29:55,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-23 15:29:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-23 15:29:55,450 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-07-23 15:29:55,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:55,450 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-23 15:29:55,455 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:29:55,456 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-23 15:29:55,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 15:29:55,456 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:55,456 INFO L353 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-07-23 15:29:55,456 INFO L414 AbstractCegarLoop]: === Iteration 5 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:55,457 INFO L82 PathProgramCache]: Analyzing trace with hash 911361299, now seen corresponding path program 4 times [2018-07-23 15:29:55,457 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:55,521 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 15:29:55,521 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:55,521 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:29:55,522 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 15:29:55,522 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 15:29:55,522 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:29:55,523 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-07-23 15:29:55,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:55,536 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-07-23 15:29:55,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 15:29:55,536 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-07-23 15:29:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:55,537 INFO L225 Difference]: With dead ends: 9 [2018-07-23 15:29:55,537 INFO L226 Difference]: Without dead ends: 8 [2018-07-23 15:29:55,538 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:29:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-07-23 15:29:55,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-07-23 15:29:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-07-23 15:29:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-07-23 15:29:55,540 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-07-23 15:29:55,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:55,541 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-07-23 15:29:55,541 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 15:29:55,541 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-07-23 15:29:55,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-23 15:29:55,542 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:55,542 INFO L353 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-07-23 15:29:55,542 INFO L414 AbstractCegarLoop]: === Iteration 6 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:55,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1812570568, now seen corresponding path program 5 times [2018-07-23 15:29:55,543 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:55,625 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 15:29:55,626 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:55,627 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-23 15:29:55,627 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 15:29:55,627 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 15:29:55,628 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:29:55,628 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-07-23 15:29:55,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:55,662 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-07-23 15:29:55,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 15:29:55,662 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-07-23 15:29:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:55,663 INFO L225 Difference]: With dead ends: 10 [2018-07-23 15:29:55,663 INFO L226 Difference]: Without dead ends: 9 [2018-07-23 15:29:55,664 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 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 15:29:55,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-23 15:29:55,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-23 15:29:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 15:29:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-23 15:29:55,669 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-07-23 15:29:55,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:55,670 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-23 15:29:55,670 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 15:29:55,670 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-23 15:29:55,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-23 15:29:55,672 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:55,672 INFO L353 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-07-23 15:29:55,672 INFO L414 AbstractCegarLoop]: === Iteration 7 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:55,672 INFO L82 PathProgramCache]: Analyzing trace with hash -355112525, now seen corresponding path program 6 times [2018-07-23 15:29:55,673 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:55,734 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 15:29:55,734 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:55,734 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-23 15:29:55,735 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 15:29:55,735 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 15:29:55,737 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:29:55,737 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-07-23 15:29:55,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:55,751 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-07-23 15:29:55,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 15:29:55,751 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-07-23 15:29:55,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:55,752 INFO L225 Difference]: With dead ends: 11 [2018-07-23 15:29:55,752 INFO L226 Difference]: Without dead ends: 10 [2018-07-23 15:29:55,753 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 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 15:29:55,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-07-23 15:29:55,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-07-23 15:29:55,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-07-23 15:29:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-07-23 15:29:55,756 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-07-23 15:29:55,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:55,757 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-07-23 15:29:55,757 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 15:29:55,757 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-07-23 15:29:55,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-07-23 15:29:55,758 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:55,758 INFO L353 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-07-23 15:29:55,758 INFO L414 AbstractCegarLoop]: === Iteration 8 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:55,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1876413848, now seen corresponding path program 7 times [2018-07-23 15:29:55,759 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:55,811 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 15:29:55,812 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:55,812 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-23 15:29:55,813 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 15:29:55,813 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 15:29:55,813 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:29:55,814 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-07-23 15:29:55,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:55,831 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-07-23 15:29:55,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 15:29:55,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-07-23 15:29:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:55,833 INFO L225 Difference]: With dead ends: 12 [2018-07-23 15:29:55,833 INFO L226 Difference]: Without dead ends: 11 [2018-07-23 15:29:55,834 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 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 15:29:55,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-07-23 15:29:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-07-23 15:29:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-23 15:29:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-23 15:29:55,838 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-07-23 15:29:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:55,840 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-23 15:29:55,840 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 15:29:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-23 15:29:55,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 15:29:55,840 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:55,841 INFO L353 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-07-23 15:29:55,841 INFO L414 AbstractCegarLoop]: === Iteration 9 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:55,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1960712621, now seen corresponding path program 8 times [2018-07-23 15:29:55,841 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:55,905 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 15:29:55,905 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:55,905 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 15:29:55,906 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 15:29:55,906 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 15:29:55,906 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:29:55,907 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-07-23 15:29:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:55,921 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-07-23 15:29:55,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 15:29:55,924 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-07-23 15:29:55,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:55,925 INFO L225 Difference]: With dead ends: 13 [2018-07-23 15:29:55,925 INFO L226 Difference]: Without dead ends: 12 [2018-07-23 15:29:55,926 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 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 15:29:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-23 15:29:55,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-07-23 15:29:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-23 15:29:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-07-23 15:29:55,931 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-07-23 15:29:55,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:55,931 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-07-23 15:29:55,931 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 15:29:55,932 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-07-23 15:29:55,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-23 15:29:55,932 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:55,932 INFO L353 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-07-23 15:29:55,933 INFO L414 AbstractCegarLoop]: === Iteration 10 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:55,933 INFO L82 PathProgramCache]: Analyzing trace with hash -652548872, now seen corresponding path program 9 times [2018-07-23 15:29:55,933 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:55,991 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 15:29:55,991 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:55,992 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-23 15:29:55,992 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 15:29:55,992 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 15:29:55,993 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:29:55,993 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-07-23 15:29:56,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:56,018 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-07-23 15:29:56,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 15:29:56,019 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-07-23 15:29:56,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:56,022 INFO L225 Difference]: With dead ends: 14 [2018-07-23 15:29:56,023 INFO L226 Difference]: Without dead ends: 13 [2018-07-23 15:29:56,023 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:29:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-23 15:29:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-07-23 15:29:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-07-23 15:29:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-07-23 15:29:56,031 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-07-23 15:29:56,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:56,032 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-07-23 15:29:56,033 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 15:29:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-07-23 15:29:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-07-23 15:29:56,033 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:56,034 INFO L353 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-07-23 15:29:56,034 INFO L414 AbstractCegarLoop]: === Iteration 11 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:56,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1245821683, now seen corresponding path program 10 times [2018-07-23 15:29:56,034 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:56,093 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 15:29:56,094 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:56,094 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-23 15:29:56,095 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 15:29:56,095 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 15:29:56,095 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:29:56,096 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-07-23 15:29:56,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:56,110 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-07-23 15:29:56,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 15:29:56,110 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-07-23 15:29:56,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:56,111 INFO L225 Difference]: With dead ends: 15 [2018-07-23 15:29:56,111 INFO L226 Difference]: Without dead ends: 14 [2018-07-23 15:29:56,112 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 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 15:29:56,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-23 15:29:56,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-23 15:29:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-23 15:29:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-07-23 15:29:56,122 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-07-23 15:29:56,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:56,122 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-07-23 15:29:56,122 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 15:29:56,123 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-07-23 15:29:56,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-23 15:29:56,123 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:56,123 INFO L353 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-07-23 15:29:56,124 INFO L414 AbstractCegarLoop]: === Iteration 12 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:56,124 INFO L82 PathProgramCache]: Analyzing trace with hash -34233256, now seen corresponding path program 11 times [2018-07-23 15:29:56,126 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:56,185 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 15:29:56,185 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:56,186 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-07-23 15:29:56,186 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 15:29:56,186 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 15:29:56,187 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:29:56,187 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-07-23 15:29:56,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:56,214 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-07-23 15:29:56,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 15:29:56,215 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-07-23 15:29:56,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:56,216 INFO L225 Difference]: With dead ends: 16 [2018-07-23 15:29:56,216 INFO L226 Difference]: Without dead ends: 15 [2018-07-23 15:29:56,217 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 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 15:29:56,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-23 15:29:56,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-07-23 15:29:56,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-07-23 15:29:56,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-07-23 15:29:56,227 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-07-23 15:29:56,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:56,227 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-07-23 15:29:56,227 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 15:29:56,228 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-07-23 15:29:56,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-23 15:29:56,228 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:56,228 INFO L353 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-07-23 15:29:56,229 INFO L414 AbstractCegarLoop]: === Iteration 13 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:56,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1061230701, now seen corresponding path program 12 times [2018-07-23 15:29:56,229 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:56,323 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 15:29:56,324 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:56,324 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-23 15:29:56,324 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 15:29:56,324 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 15:29:56,325 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:29:56,325 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-07-23 15:29:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:56,355 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-07-23 15:29:56,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 15:29:56,356 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-07-23 15:29:56,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:56,357 INFO L225 Difference]: With dead ends: 17 [2018-07-23 15:29:56,357 INFO L226 Difference]: Without dead ends: 16 [2018-07-23 15:29:56,358 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:29:56,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-23 15:29:56,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-07-23 15:29:56,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-23 15:29:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-07-23 15:29:56,364 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-07-23 15:29:56,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:56,364 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-07-23 15:29:56,364 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 15:29:56,365 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-07-23 15:29:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-23 15:29:56,368 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:56,368 INFO L353 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-07-23 15:29:56,369 INFO L414 AbstractCegarLoop]: === Iteration 14 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:56,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1461586872, now seen corresponding path program 13 times [2018-07-23 15:29:56,370 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:56,465 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 15:29:56,466 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:56,466 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-07-23 15:29:56,466 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 15:29:56,467 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 15:29:56,467 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:29:56,467 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-07-23 15:29:56,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:56,497 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-07-23 15:29:56,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 15:29:56,498 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-07-23 15:29:56,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:56,499 INFO L225 Difference]: With dead ends: 18 [2018-07-23 15:29:56,499 INFO L226 Difference]: Without dead ends: 17 [2018-07-23 15:29:56,504 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:29:56,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-07-23 15:29:56,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-07-23 15:29:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-23 15:29:56,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-07-23 15:29:56,510 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-07-23 15:29:56,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:56,513 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-07-23 15:29:56,513 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 15:29:56,513 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-07-23 15:29:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-23 15:29:56,514 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:56,514 INFO L353 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-07-23 15:29:56,515 INFO L414 AbstractCegarLoop]: === Iteration 15 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:56,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1935446989, now seen corresponding path program 14 times [2018-07-23 15:29:56,515 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:56,612 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 15:29:56,613 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:56,613 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-23 15:29:56,613 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 15:29:56,614 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 15:29:56,614 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:29:56,616 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-07-23 15:29:56,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:56,630 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-07-23 15:29:56,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 15:29:56,631 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-07-23 15:29:56,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:56,631 INFO L225 Difference]: With dead ends: 19 [2018-07-23 15:29:56,631 INFO L226 Difference]: Without dead ends: 18 [2018-07-23 15:29:56,632 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:29:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-23 15:29:56,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-07-23 15:29:56,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-23 15:29:56,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-07-23 15:29:56,643 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-07-23 15:29:56,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:56,643 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-07-23 15:29:56,643 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 15:29:56,644 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-07-23 15:29:56,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-23 15:29:56,648 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:56,649 INFO L353 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-07-23 15:29:56,649 INFO L414 AbstractCegarLoop]: === Iteration 16 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:56,649 INFO L82 PathProgramCache]: Analyzing trace with hash 130685720, now seen corresponding path program 15 times [2018-07-23 15:29:56,649 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:56,722 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 15:29:56,722 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:56,722 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-07-23 15:29:56,723 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 15:29:56,723 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 15:29:56,723 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:29:56,724 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-07-23 15:29:56,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:56,736 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-07-23 15:29:56,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 15:29:56,736 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-07-23 15:29:56,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:56,737 INFO L225 Difference]: With dead ends: 20 [2018-07-23 15:29:56,737 INFO L226 Difference]: Without dead ends: 19 [2018-07-23 15:29:56,738 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:29:56,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-07-23 15:29:56,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-07-23 15:29:56,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-07-23 15:29:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-07-23 15:29:56,741 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-07-23 15:29:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:56,742 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-07-23 15:29:56,742 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 15:29:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-07-23 15:29:56,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-07-23 15:29:56,743 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:56,743 INFO L353 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-07-23 15:29:56,743 INFO L414 AbstractCegarLoop]: === Iteration 17 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:56,743 INFO L82 PathProgramCache]: Analyzing trace with hash -243709741, now seen corresponding path program 16 times [2018-07-23 15:29:56,743 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:56,813 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 15:29:56,813 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:56,814 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-07-23 15:29:56,814 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 15:29:56,814 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 15:29:56,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:29:56,815 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-07-23 15:29:56,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:56,827 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-07-23 15:29:56,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 15:29:56,827 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-07-23 15:29:56,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:56,828 INFO L225 Difference]: With dead ends: 21 [2018-07-23 15:29:56,828 INFO L226 Difference]: Without dead ends: 20 [2018-07-23 15:29:56,829 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:29:56,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-07-23 15:29:56,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-07-23 15:29:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-23 15:29:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-07-23 15:29:56,832 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-07-23 15:29:56,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:56,833 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-07-23 15:29:56,833 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 15:29:56,833 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-07-23 15:29:56,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-23 15:29:56,834 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:56,834 INFO L353 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-07-23 15:29:56,834 INFO L414 AbstractCegarLoop]: === Iteration 18 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:56,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1034932856, now seen corresponding path program 17 times [2018-07-23 15:29:56,835 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:56,909 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 15:29:56,909 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:56,910 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-07-23 15:29:56,910 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 15:29:56,912 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 15:29:56,912 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:29:56,912 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-07-23 15:29:56,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:56,928 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-07-23 15:29:56,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 15:29:56,928 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-07-23 15:29:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:56,929 INFO L225 Difference]: With dead ends: 22 [2018-07-23 15:29:56,929 INFO L226 Difference]: Without dead ends: 21 [2018-07-23 15:29:56,932 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:29:56,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-23 15:29:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-07-23 15:29:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-07-23 15:29:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-07-23 15:29:56,938 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-07-23 15:29:56,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:56,941 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-07-23 15:29:56,941 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 15:29:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-07-23 15:29:56,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-23 15:29:56,942 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:56,942 INFO L353 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-07-23 15:29:56,942 INFO L414 AbstractCegarLoop]: === Iteration 19 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:56,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2018147699, now seen corresponding path program 18 times [2018-07-23 15:29:56,943 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:57,060 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 15:29:57,061 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:57,061 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-07-23 15:29:57,061 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 15:29:57,062 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 15:29:57,062 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:29:57,064 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-07-23 15:29:57,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:57,085 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-07-23 15:29:57,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 15:29:57,085 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-07-23 15:29:57,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:57,086 INFO L225 Difference]: With dead ends: 23 [2018-07-23 15:29:57,086 INFO L226 Difference]: Without dead ends: 22 [2018-07-23 15:29:57,087 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:29:57,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-07-23 15:29:57,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-07-23 15:29:57,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-23 15:29:57,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-07-23 15:29:57,090 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-07-23 15:29:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:57,094 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-07-23 15:29:57,094 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 15:29:57,094 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-07-23 15:29:57,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-23 15:29:57,094 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:57,095 INFO L353 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-07-23 15:29:57,095 INFO L414 AbstractCegarLoop]: === Iteration 20 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:57,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1861930536, now seen corresponding path program 19 times [2018-07-23 15:29:57,095 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:57,198 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 15:29:57,199 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:57,199 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-07-23 15:29:57,199 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 15:29:57,199 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 15:29:57,200 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:29:57,200 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-07-23 15:29:57,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:57,222 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-07-23 15:29:57,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 15:29:57,223 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-07-23 15:29:57,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:57,223 INFO L225 Difference]: With dead ends: 24 [2018-07-23 15:29:57,224 INFO L226 Difference]: Without dead ends: 23 [2018-07-23 15:29:57,226 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:29:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-07-23 15:29:57,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-07-23 15:29:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-23 15:29:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-07-23 15:29:57,234 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-07-23 15:29:57,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:57,235 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-07-23 15:29:57,235 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 15:29:57,235 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-07-23 15:29:57,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 15:29:57,236 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:57,237 INFO L353 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-07-23 15:29:57,237 INFO L414 AbstractCegarLoop]: === Iteration 21 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:57,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1885271533, now seen corresponding path program 20 times [2018-07-23 15:29:57,237 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:57,339 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 15:29:57,340 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:57,340 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-07-23 15:29:57,341 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 15:29:57,341 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 15:29:57,342 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:29:57,342 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-07-23 15:29:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:57,366 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-07-23 15:29:57,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 15:29:57,366 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-07-23 15:29:57,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:57,367 INFO L225 Difference]: With dead ends: 25 [2018-07-23 15:29:57,367 INFO L226 Difference]: Without dead ends: 24 [2018-07-23 15:29:57,368 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:29:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-23 15:29:57,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-07-23 15:29:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-23 15:29:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-07-23 15:29:57,375 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-07-23 15:29:57,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:57,375 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-07-23 15:29:57,375 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 15:29:57,376 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-07-23 15:29:57,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-23 15:29:57,377 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:57,377 INFO L353 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-07-23 15:29:57,377 INFO L414 AbstractCegarLoop]: === Iteration 22 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:57,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1686124856, now seen corresponding path program 21 times [2018-07-23 15:29:57,378 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:57,498 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 15:29:57,499 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:57,499 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-07-23 15:29:57,500 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 15:29:57,500 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 15:29:57,500 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:29:57,501 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-07-23 15:29:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:57,518 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-07-23 15:29:57,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 15:29:57,519 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-07-23 15:29:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:57,520 INFO L225 Difference]: With dead ends: 26 [2018-07-23 15:29:57,520 INFO L226 Difference]: Without dead ends: 25 [2018-07-23 15:29:57,521 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:29:57,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-07-23 15:29:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-07-23 15:29:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-23 15:29:57,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-07-23 15:29:57,524 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-07-23 15:29:57,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:57,525 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-07-23 15:29:57,525 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 15:29:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-07-23 15:29:57,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-07-23 15:29:57,526 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:57,526 INFO L353 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-07-23 15:29:57,526 INFO L414 AbstractCegarLoop]: === Iteration 23 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:57,526 INFO L82 PathProgramCache]: Analyzing trace with hash 730263219, now seen corresponding path program 22 times [2018-07-23 15:29:57,527 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:57,701 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 15:29:57,701 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:57,701 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-07-23 15:29:57,702 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 15:29:57,702 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 15:29:57,702 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:29:57,703 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-07-23 15:29:57,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:57,732 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-07-23 15:29:57,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-23 15:29:57,732 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-07-23 15:29:57,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:57,733 INFO L225 Difference]: With dead ends: 27 [2018-07-23 15:29:57,733 INFO L226 Difference]: Without dead ends: 26 [2018-07-23 15:29:57,734 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:29:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-07-23 15:29:57,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-07-23 15:29:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-23 15:29:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-07-23 15:29:57,742 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-07-23 15:29:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:57,743 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-07-23 15:29:57,743 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 15:29:57,743 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-07-23 15:29:57,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-23 15:29:57,744 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:57,744 INFO L353 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-07-23 15:29:57,744 INFO L414 AbstractCegarLoop]: === Iteration 24 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:57,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1163323544, now seen corresponding path program 23 times [2018-07-23 15:29:57,745 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:57,924 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 15:29:57,925 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:57,925 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-07-23 15:29:57,925 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 15:29:57,925 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 15:29:57,926 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:29:57,926 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-07-23 15:29:57,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:57,944 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-07-23 15:29:57,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 15:29:57,945 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-07-23 15:29:57,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:57,945 INFO L225 Difference]: With dead ends: 28 [2018-07-23 15:29:57,945 INFO L226 Difference]: Without dead ends: 27 [2018-07-23 15:29:57,946 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 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 15:29:57,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-23 15:29:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-07-23 15:29:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-07-23 15:29:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-07-23 15:29:57,950 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-07-23 15:29:57,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:57,950 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-07-23 15:29:57,950 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 15:29:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-07-23 15:29:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-23 15:29:57,951 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:57,951 INFO L353 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-07-23 15:29:57,951 INFO L414 AbstractCegarLoop]: === Iteration 25 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:57,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1703291731, now seen corresponding path program 24 times [2018-07-23 15:29:57,952 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:58,082 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 15:29:58,083 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:58,083 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-07-23 15:29:58,083 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 15:29:58,084 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 15:29:58,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:29:58,085 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-07-23 15:29:58,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:58,105 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-07-23 15:29:58,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 15:29:58,105 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-07-23 15:29:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:58,106 INFO L225 Difference]: With dead ends: 29 [2018-07-23 15:29:58,106 INFO L226 Difference]: Without dead ends: 28 [2018-07-23 15:29:58,107 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:29:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-07-23 15:29:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-07-23 15:29:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-23 15:29:58,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-07-23 15:29:58,115 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-07-23 15:29:58,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:58,115 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-07-23 15:29:58,115 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 15:29:58,116 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-07-23 15:29:58,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-23 15:29:58,116 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:58,116 INFO L353 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-07-23 15:29:58,117 INFO L414 AbstractCegarLoop]: === Iteration 26 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:58,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1262436344, now seen corresponding path program 25 times [2018-07-23 15:29:58,117 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:58,258 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 15:29:58,259 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:58,259 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-07-23 15:29:58,260 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 15:29:58,260 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 15:29:58,261 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:29:58,261 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-07-23 15:29:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:58,278 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-07-23 15:29:58,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 15:29:58,278 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-07-23 15:29:58,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:58,279 INFO L225 Difference]: With dead ends: 30 [2018-07-23 15:29:58,279 INFO L226 Difference]: Without dead ends: 29 [2018-07-23 15:29:58,280 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:29:58,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-07-23 15:29:58,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-07-23 15:29:58,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-23 15:29:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-07-23 15:29:58,285 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-07-23 15:29:58,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:58,285 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-07-23 15:29:58,285 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 15:29:58,285 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-07-23 15:29:58,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-23 15:29:58,286 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:58,286 INFO L353 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-07-23 15:29:58,286 INFO L414 AbstractCegarLoop]: === Iteration 27 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:58,287 INFO L82 PathProgramCache]: Analyzing trace with hash 480821235, now seen corresponding path program 26 times [2018-07-23 15:29:58,287 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:58,439 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 15:29:58,439 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:58,440 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-07-23 15:29:58,440 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 15:29:58,442 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 15:29:58,442 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:29:58,443 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-07-23 15:29:58,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:58,463 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-07-23 15:29:58,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 15:29:58,464 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-07-23 15:29:58,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:58,464 INFO L225 Difference]: With dead ends: 31 [2018-07-23 15:29:58,464 INFO L226 Difference]: Without dead ends: 30 [2018-07-23 15:29:58,465 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:29:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-23 15:29:58,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-07-23 15:29:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-07-23 15:29:58,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-07-23 15:29:58,469 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-07-23 15:29:58,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:58,469 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-07-23 15:29:58,469 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 15:29:58,470 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-07-23 15:29:58,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-07-23 15:29:58,471 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:58,471 INFO L353 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-07-23 15:29:58,471 INFO L414 AbstractCegarLoop]: === Iteration 28 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:58,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2020556632, now seen corresponding path program 27 times [2018-07-23 15:29:58,472 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:58,616 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 15:29:58,617 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:58,617 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-07-23 15:29:58,617 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 15:29:58,618 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 15:29:58,618 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:29:58,619 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-07-23 15:29:58,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:58,644 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-07-23 15:29:58,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 15:29:58,645 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-07-23 15:29:58,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:58,645 INFO L225 Difference]: With dead ends: 32 [2018-07-23 15:29:58,645 INFO L226 Difference]: Without dead ends: 31 [2018-07-23 15:29:58,646 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:29:58,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-07-23 15:29:58,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-07-23 15:29:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-07-23 15:29:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-07-23 15:29:58,654 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-07-23 15:29:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:58,654 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-07-23 15:29:58,654 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 15:29:58,655 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-07-23 15:29:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-23 15:29:58,655 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:58,655 INFO L353 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-07-23 15:29:58,656 INFO L414 AbstractCegarLoop]: === Iteration 29 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:58,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1787253613, now seen corresponding path program 28 times [2018-07-23 15:29:58,656 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:58,820 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 15:29:58,820 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:58,820 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-07-23 15:29:58,821 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 15:29:58,821 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 15:29:58,822 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:29:58,822 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-07-23 15:29:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:58,843 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-07-23 15:29:58,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 15:29:58,843 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-07-23 15:29:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:58,844 INFO L225 Difference]: With dead ends: 33 [2018-07-23 15:29:58,844 INFO L226 Difference]: Without dead ends: 32 [2018-07-23 15:29:58,845 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:29:58,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-07-23 15:29:58,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-07-23 15:29:58,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-23 15:29:58,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-07-23 15:29:58,853 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-07-23 15:29:58,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:58,857 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-07-23 15:29:58,857 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 15:29:58,857 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-07-23 15:29:58,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-23 15:29:58,858 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:58,858 INFO L353 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-07-23 15:29:58,858 INFO L414 AbstractCegarLoop]: === Iteration 30 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:58,860 INFO L82 PathProgramCache]: Analyzing trace with hash 429713080, now seen corresponding path program 29 times [2018-07-23 15:29:58,860 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:59,128 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 15:29:59,128 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:59,128 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-07-23 15:29:59,129 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 15:29:59,129 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 15:29:59,130 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:29:59,130 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-07-23 15:29:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:59,148 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-07-23 15:29:59,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 15:29:59,149 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-07-23 15:29:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:59,149 INFO L225 Difference]: With dead ends: 34 [2018-07-23 15:29:59,149 INFO L226 Difference]: Without dead ends: 33 [2018-07-23 15:29:59,150 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:29:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-23 15:29:59,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-07-23 15:29:59,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-07-23 15:29:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-07-23 15:29:59,155 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-07-23 15:29:59,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:59,156 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-07-23 15:29:59,156 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 15:29:59,156 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-07-23 15:29:59,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-23 15:29:59,157 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:59,157 INFO L353 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-07-23 15:29:59,157 INFO L414 AbstractCegarLoop]: === Iteration 31 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:59,157 INFO L82 PathProgramCache]: Analyzing trace with hash 436203827, now seen corresponding path program 30 times [2018-07-23 15:29:59,157 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:59,304 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 15:29:59,305 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:59,305 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-07-23 15:29:59,305 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 15:29:59,306 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 15:29:59,306 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:29:59,307 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-07-23 15:29:59,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:59,324 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-07-23 15:29:59,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-23 15:29:59,324 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-07-23 15:29:59,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:59,325 INFO L225 Difference]: With dead ends: 35 [2018-07-23 15:29:59,325 INFO L226 Difference]: Without dead ends: 34 [2018-07-23 15:29:59,326 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:29:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-07-23 15:29:59,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-07-23 15:29:59,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-07-23 15:29:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-07-23 15:29:59,329 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-07-23 15:29:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:59,329 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-07-23 15:29:59,329 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 15:29:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-07-23 15:29:59,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-07-23 15:29:59,329 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:59,330 INFO L353 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-07-23 15:29:59,330 INFO L414 AbstractCegarLoop]: === Iteration 32 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:59,330 INFO L82 PathProgramCache]: Analyzing trace with hash 637416984, now seen corresponding path program 31 times [2018-07-23 15:29:59,330 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:59,480 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 15:29:59,480 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:59,481 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-07-23 15:29:59,481 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 15:29:59,481 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 15:29:59,482 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:29:59,482 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-07-23 15:29:59,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:59,498 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-07-23 15:29:59,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 15:29:59,498 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-07-23 15:29:59,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:59,499 INFO L225 Difference]: With dead ends: 36 [2018-07-23 15:29:59,499 INFO L226 Difference]: Without dead ends: 35 [2018-07-23 15:29:59,500 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:29:59,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-07-23 15:29:59,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-07-23 15:29:59,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-23 15:29:59,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-07-23 15:29:59,503 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-07-23 15:29:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:59,503 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-07-23 15:29:59,503 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 15:29:59,503 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-07-23 15:29:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-23 15:29:59,504 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:59,504 INFO L353 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-07-23 15:29:59,504 INFO L414 AbstractCegarLoop]: === Iteration 33 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:59,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1714909741, now seen corresponding path program 32 times [2018-07-23 15:29:59,504 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:59,665 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 15:29:59,666 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:59,666 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-07-23 15:29:59,666 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 15:29:59,667 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 15:29:59,667 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:29:59,668 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-07-23 15:29:59,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:59,688 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-07-23 15:29:59,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 15:29:59,688 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-07-23 15:29:59,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:59,689 INFO L225 Difference]: With dead ends: 37 [2018-07-23 15:29:59,689 INFO L226 Difference]: Without dead ends: 36 [2018-07-23 15:29:59,690 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:29:59,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-23 15:29:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-07-23 15:29:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-23 15:29:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-07-23 15:29:59,693 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-07-23 15:29:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:59,693 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-07-23 15:29:59,693 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 15:29:59,693 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-07-23 15:29:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-23 15:29:59,694 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:59,694 INFO L353 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-07-23 15:29:59,694 INFO L414 AbstractCegarLoop]: === Iteration 34 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:59,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1622594184, now seen corresponding path program 33 times [2018-07-23 15:29:59,694 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:29:59,869 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 15:29:59,870 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:29:59,870 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-07-23 15:29:59,870 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 15:29:59,871 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 15:29:59,871 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:29:59,872 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-07-23 15:29:59,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:29:59,893 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-07-23 15:29:59,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 15:29:59,893 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-07-23 15:29:59,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:29:59,893 INFO L225 Difference]: With dead ends: 38 [2018-07-23 15:29:59,894 INFO L226 Difference]: Without dead ends: 37 [2018-07-23 15:29:59,895 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:29:59,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-07-23 15:29:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-07-23 15:29:59,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-07-23 15:29:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-07-23 15:29:59,897 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-07-23 15:29:59,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:29:59,898 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-07-23 15:29:59,898 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 15:29:59,898 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-07-23 15:29:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-07-23 15:29:59,898 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:29:59,898 INFO L353 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-07-23 15:29:59,898 INFO L414 AbstractCegarLoop]: === Iteration 35 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:29:59,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1239188083, now seen corresponding path program 34 times [2018-07-23 15:29:59,899 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:29:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:00,079 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 15:30:00,079 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:00,080 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-07-23 15:30:00,080 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 15:30:00,080 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 15:30:00,081 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:30:00,081 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-07-23 15:30:00,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:00,102 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-07-23 15:30:00,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-23 15:30:00,103 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-07-23 15:30:00,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:00,103 INFO L225 Difference]: With dead ends: 39 [2018-07-23 15:30:00,103 INFO L226 Difference]: Without dead ends: 38 [2018-07-23 15:30:00,104 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:30:00,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-07-23 15:30:00,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-07-23 15:30:00,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-07-23 15:30:00,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-07-23 15:30:00,107 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-07-23 15:30:00,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:00,107 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-07-23 15:30:00,107 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 15:30:00,107 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-07-23 15:30:00,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-23 15:30:00,107 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:00,108 INFO L353 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-07-23 15:30:00,108 INFO L414 AbstractCegarLoop]: === Iteration 36 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:00,108 INFO L82 PathProgramCache]: Analyzing trace with hash -239874856, now seen corresponding path program 35 times [2018-07-23 15:30:00,108 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:00,287 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 15:30:00,287 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:00,287 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-07-23 15:30:00,287 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 15:30:00,288 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 15:30:00,288 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:30:00,289 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-07-23 15:30:00,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:00,310 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-07-23 15:30:00,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 15:30:00,311 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-07-23 15:30:00,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:00,311 INFO L225 Difference]: With dead ends: 40 [2018-07-23 15:30:00,311 INFO L226 Difference]: Without dead ends: 39 [2018-07-23 15:30:00,312 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:30:00,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-23 15:30:00,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-07-23 15:30:00,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-07-23 15:30:00,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-07-23 15:30:00,315 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-07-23 15:30:00,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:00,315 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-07-23 15:30:00,315 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 15:30:00,315 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-07-23 15:30:00,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-23 15:30:00,315 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:00,316 INFO L353 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-07-23 15:30:00,316 INFO L414 AbstractCegarLoop]: === Iteration 37 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:00,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1153814291, now seen corresponding path program 36 times [2018-07-23 15:30:00,316 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:00,493 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 15:30:00,493 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:00,494 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-07-23 15:30:00,494 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 15:30:00,496 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 15:30:00,496 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:30:00,497 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-07-23 15:30:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:00,520 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-07-23 15:30:00,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 15:30:00,520 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-07-23 15:30:00,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:00,520 INFO L225 Difference]: With dead ends: 41 [2018-07-23 15:30:00,521 INFO L226 Difference]: Without dead ends: 40 [2018-07-23 15:30:00,522 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:30:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-07-23 15:30:00,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-07-23 15:30:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-23 15:30:00,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-07-23 15:30:00,524 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-07-23 15:30:00,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:00,524 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-07-23 15:30:00,525 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 15:30:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-07-23 15:30:00,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-23 15:30:00,525 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:00,525 INFO L353 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-07-23 15:30:00,525 INFO L414 AbstractCegarLoop]: === Iteration 38 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:00,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1408504888, now seen corresponding path program 37 times [2018-07-23 15:30:00,526 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:00,739 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 15:30:00,740 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:00,740 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-07-23 15:30:00,740 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 15:30:00,740 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 15:30:00,741 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:30:00,742 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-07-23 15:30:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:00,766 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-07-23 15:30:00,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 15:30:00,767 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-07-23 15:30:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:00,767 INFO L225 Difference]: With dead ends: 42 [2018-07-23 15:30:00,767 INFO L226 Difference]: Without dead ends: 41 [2018-07-23 15:30:00,769 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:30:00,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-07-23 15:30:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-07-23 15:30:00,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-07-23 15:30:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-07-23 15:30:00,772 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-07-23 15:30:00,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:00,772 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-07-23 15:30:00,772 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 15:30:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-07-23 15:30:00,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-23 15:30:00,773 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:00,773 INFO L353 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-07-23 15:30:00,773 INFO L414 AbstractCegarLoop]: === Iteration 39 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:00,774 INFO L82 PathProgramCache]: Analyzing trace with hash 713978803, now seen corresponding path program 38 times [2018-07-23 15:30:00,774 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:00,976 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 15:30:00,976 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:00,977 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-07-23 15:30:00,977 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 15:30:00,977 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 15:30:00,979 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:30:00,979 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-07-23 15:30:01,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:01,000 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-07-23 15:30:01,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 15:30:01,000 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-07-23 15:30:01,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:01,001 INFO L225 Difference]: With dead ends: 43 [2018-07-23 15:30:01,001 INFO L226 Difference]: Without dead ends: 42 [2018-07-23 15:30:01,003 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:30:01,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-23 15:30:01,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-07-23 15:30:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-07-23 15:30:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-07-23 15:30:01,005 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-07-23 15:30:01,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:01,007 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-07-23 15:30:01,007 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 15:30:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-07-23 15:30:01,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-07-23 15:30:01,008 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:01,008 INFO L353 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-07-23 15:30:01,008 INFO L414 AbstractCegarLoop]: === Iteration 40 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:01,009 INFO L82 PathProgramCache]: Analyzing trace with hash 658506648, now seen corresponding path program 39 times [2018-07-23 15:30:01,009 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:01,241 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 15:30:01,242 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:01,242 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-07-23 15:30:01,242 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 15:30:01,243 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 15:30:01,244 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:30:01,244 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-07-23 15:30:01,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:01,268 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-07-23 15:30:01,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 15:30:01,269 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-07-23 15:30:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:01,269 INFO L225 Difference]: With dead ends: 44 [2018-07-23 15:30:01,270 INFO L226 Difference]: Without dead ends: 43 [2018-07-23 15:30:01,271 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:30:01,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-07-23 15:30:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-07-23 15:30:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-07-23 15:30:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-07-23 15:30:01,274 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-07-23 15:30:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:01,274 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-07-23 15:30:01,274 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 15:30:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-07-23 15:30:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-07-23 15:30:01,275 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:01,275 INFO L353 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-07-23 15:30:01,275 INFO L414 AbstractCegarLoop]: === Iteration 41 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:01,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1061130157, now seen corresponding path program 40 times [2018-07-23 15:30:01,276 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:01,517 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 15:30:01,517 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:01,517 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-07-23 15:30:01,518 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 15:30:01,518 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 15:30:01,519 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:30:01,519 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-07-23 15:30:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:01,549 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-07-23 15:30:01,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 15:30:01,550 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-07-23 15:30:01,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:01,551 INFO L225 Difference]: With dead ends: 45 [2018-07-23 15:30:01,551 INFO L226 Difference]: Without dead ends: 44 [2018-07-23 15:30:01,552 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:30:01,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-07-23 15:30:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-07-23 15:30:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-23 15:30:01,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-07-23 15:30:01,555 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-07-23 15:30:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:01,555 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-07-23 15:30:01,555 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 15:30:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-07-23 15:30:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-23 15:30:01,556 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:01,556 INFO L353 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-07-23 15:30:01,556 INFO L414 AbstractCegarLoop]: === Iteration 42 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:01,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1464703736, now seen corresponding path program 41 times [2018-07-23 15:30:01,557 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:01,819 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 15:30:01,858 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:01,859 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-07-23 15:30:01,859 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 15:30:01,859 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 15:30:01,860 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:30:01,861 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-07-23 15:30:01,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:01,899 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-07-23 15:30:01,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 15:30:01,900 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-07-23 15:30:01,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:01,900 INFO L225 Difference]: With dead ends: 46 [2018-07-23 15:30:01,901 INFO L226 Difference]: Without dead ends: 45 [2018-07-23 15:30:01,902 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:30:01,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-07-23 15:30:01,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-07-23 15:30:01,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-07-23 15:30:01,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-07-23 15:30:01,906 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-07-23 15:30:01,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:01,906 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-07-23 15:30:01,907 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 15:30:01,907 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-07-23 15:30:01,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-23 15:30:01,907 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:01,907 INFO L353 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-07-23 15:30:01,908 INFO L414 AbstractCegarLoop]: === Iteration 43 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:01,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1838824205, now seen corresponding path program 42 times [2018-07-23 15:30:01,908 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:02,135 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 15:30:02,136 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:02,136 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-07-23 15:30:02,136 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 15:30:02,137 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 15:30:02,138 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:30:02,138 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-07-23 15:30:02,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:02,168 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-07-23 15:30:02,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-23 15:30:02,169 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-07-23 15:30:02,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:02,169 INFO L225 Difference]: With dead ends: 47 [2018-07-23 15:30:02,170 INFO L226 Difference]: Without dead ends: 46 [2018-07-23 15:30:02,171 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:30:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-07-23 15:30:02,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-07-23 15:30:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-07-23 15:30:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-07-23 15:30:02,174 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-07-23 15:30:02,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:02,174 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-07-23 15:30:02,174 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 15:30:02,174 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-07-23 15:30:02,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-07-23 15:30:02,175 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:02,175 INFO L353 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-07-23 15:30:02,175 INFO L414 AbstractCegarLoop]: === Iteration 44 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:02,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1168975272, now seen corresponding path program 43 times [2018-07-23 15:30:02,176 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:02,388 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 15:30:02,388 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:02,389 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-07-23 15:30:02,389 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 15:30:02,390 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 15:30:02,391 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:30:02,391 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-07-23 15:30:02,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:02,417 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-07-23 15:30:02,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 15:30:02,417 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-07-23 15:30:02,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:02,418 INFO L225 Difference]: With dead ends: 48 [2018-07-23 15:30:02,418 INFO L226 Difference]: Without dead ends: 47 [2018-07-23 15:30:02,419 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:30:02,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-07-23 15:30:02,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-07-23 15:30:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-23 15:30:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-07-23 15:30:02,422 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-07-23 15:30:02,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:02,422 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-07-23 15:30:02,422 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 15:30:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-07-23 15:30:02,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-23 15:30:02,423 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:02,423 INFO L353 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-07-23 15:30:02,423 INFO L414 AbstractCegarLoop]: === Iteration 45 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:02,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1878494829, now seen corresponding path program 44 times [2018-07-23 15:30:02,423 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:02,641 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 15:30:02,641 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:02,642 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-07-23 15:30:02,642 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 15:30:02,642 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 15:30:02,643 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:30:02,644 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-07-23 15:30:02,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:02,669 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-07-23 15:30:02,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 15:30:02,669 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-07-23 15:30:02,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:02,670 INFO L225 Difference]: With dead ends: 49 [2018-07-23 15:30:02,670 INFO L226 Difference]: Without dead ends: 48 [2018-07-23 15:30:02,671 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:30:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-07-23 15:30:02,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-07-23 15:30:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-07-23 15:30:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-07-23 15:30:02,673 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-07-23 15:30:02,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:02,673 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-07-23 15:30:02,673 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 15:30:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-07-23 15:30:02,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-07-23 15:30:02,674 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:02,674 INFO L353 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-07-23 15:30:02,674 INFO L414 AbstractCegarLoop]: === Iteration 46 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:02,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1896202680, now seen corresponding path program 45 times [2018-07-23 15:30:02,675 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:02,896 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 15:30:02,897 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:02,897 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-07-23 15:30:02,897 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 15:30:02,898 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 15:30:02,898 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:30:02,899 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-07-23 15:30:02,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:02,922 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-07-23 15:30:02,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 15:30:02,922 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-07-23 15:30:02,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:02,923 INFO L225 Difference]: With dead ends: 50 [2018-07-23 15:30:02,923 INFO L226 Difference]: Without dead ends: 49 [2018-07-23 15:30:02,924 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:30:02,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-07-23 15:30:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-07-23 15:30:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-07-23 15:30:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-07-23 15:30:02,926 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-07-23 15:30:02,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:02,926 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-07-23 15:30:02,927 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 15:30:02,927 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-07-23 15:30:02,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-07-23 15:30:02,927 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:02,927 INFO L353 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-07-23 15:30:02,927 INFO L414 AbstractCegarLoop]: === Iteration 47 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:02,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1347258829, now seen corresponding path program 46 times [2018-07-23 15:30:02,928 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:03,141 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 15:30:03,141 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:03,141 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-07-23 15:30:03,141 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 15:30:03,142 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 15:30:03,142 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:30:03,143 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-07-23 15:30:03,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:03,173 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-07-23 15:30:03,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 15:30:03,173 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-07-23 15:30:03,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:03,173 INFO L225 Difference]: With dead ends: 51 [2018-07-23 15:30:03,174 INFO L226 Difference]: Without dead ends: 50 [2018-07-23 15:30:03,174 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:30:03,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-07-23 15:30:03,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-07-23 15:30:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-07-23 15:30:03,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-07-23 15:30:03,177 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-07-23 15:30:03,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:03,177 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-07-23 15:30:03,177 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 15:30:03,177 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-07-23 15:30:03,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-07-23 15:30:03,178 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:03,178 INFO L353 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-07-23 15:30:03,178 INFO L414 AbstractCegarLoop]: === Iteration 48 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:03,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1184649496, now seen corresponding path program 47 times [2018-07-23 15:30:03,178 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:03,397 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 15:30:03,397 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:03,397 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-07-23 15:30:03,398 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 15:30:03,398 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 15:30:03,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:30:03,399 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-07-23 15:30:03,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:03,432 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-07-23 15:30:03,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 15:30:03,432 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-07-23 15:30:03,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:03,433 INFO L225 Difference]: With dead ends: 52 [2018-07-23 15:30:03,433 INFO L226 Difference]: Without dead ends: 51 [2018-07-23 15:30:03,434 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:30:03,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-07-23 15:30:03,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-07-23 15:30:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-07-23 15:30:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-07-23 15:30:03,436 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-07-23 15:30:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:03,437 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-07-23 15:30:03,437 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 15:30:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-07-23 15:30:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-23 15:30:03,437 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:03,438 INFO L353 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-07-23 15:30:03,438 INFO L414 AbstractCegarLoop]: === Iteration 49 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:03,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1930571053, now seen corresponding path program 48 times [2018-07-23 15:30:03,438 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:03,679 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 15:30:03,680 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:03,680 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-07-23 15:30:03,680 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 15:30:03,681 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 15:30:03,681 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:30:03,682 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-07-23 15:30:03,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:03,714 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-07-23 15:30:03,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-23 15:30:03,715 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-07-23 15:30:03,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:03,715 INFO L225 Difference]: With dead ends: 53 [2018-07-23 15:30:03,715 INFO L226 Difference]: Without dead ends: 52 [2018-07-23 15:30:03,716 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:30:03,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-07-23 15:30:03,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-07-23 15:30:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-07-23 15:30:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-07-23 15:30:03,719 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-07-23 15:30:03,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:03,719 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-07-23 15:30:03,719 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 15:30:03,719 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-07-23 15:30:03,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-07-23 15:30:03,720 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:03,720 INFO L353 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-07-23 15:30:03,720 INFO L414 AbstractCegarLoop]: === Iteration 50 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:03,720 INFO L82 PathProgramCache]: Analyzing trace with hash 281839736, now seen corresponding path program 49 times [2018-07-23 15:30:03,720 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:03,947 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 15:30:03,947 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:03,947 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-07-23 15:30:03,947 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 15:30:03,948 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 15:30:03,949 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:30:03,949 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-07-23 15:30:03,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:03,984 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-07-23 15:30:03,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 15:30:03,984 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-07-23 15:30:03,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:03,985 INFO L225 Difference]: With dead ends: 54 [2018-07-23 15:30:03,985 INFO L226 Difference]: Without dead ends: 53 [2018-07-23 15:30:03,986 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:30:03,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-07-23 15:30:03,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-07-23 15:30:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 15:30:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-07-23 15:30:03,990 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-07-23 15:30:03,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:03,990 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-07-23 15:30:03,990 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 15:30:03,990 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-07-23 15:30:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-23 15:30:03,991 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:03,991 INFO L353 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-07-23 15:30:03,991 INFO L414 AbstractCegarLoop]: === Iteration 51 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:03,992 INFO L82 PathProgramCache]: Analyzing trace with hash 147097459, now seen corresponding path program 50 times [2018-07-23 15:30:03,992 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:04,281 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 15:30:04,281 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:04,281 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-07-23 15:30:04,282 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 15:30:04,282 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 15:30:04,283 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:30:04,283 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-07-23 15:30:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:04,322 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-07-23 15:30:04,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-23 15:30:04,323 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-07-23 15:30:04,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:04,323 INFO L225 Difference]: With dead ends: 55 [2018-07-23 15:30:04,323 INFO L226 Difference]: Without dead ends: 54 [2018-07-23 15:30:04,325 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:30:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-07-23 15:30:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-07-23 15:30:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-07-23 15:30:04,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-07-23 15:30:04,327 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-07-23 15:30:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:04,328 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-07-23 15:30:04,328 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 15:30:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-07-23 15:30:04,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-07-23 15:30:04,329 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:04,329 INFO L353 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-07-23 15:30:04,329 INFO L414 AbstractCegarLoop]: === Iteration 52 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:04,329 INFO L82 PathProgramCache]: Analyzing trace with hash 265054168, now seen corresponding path program 51 times [2018-07-23 15:30:04,329 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:04,650 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 15:30:04,650 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:04,650 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-07-23 15:30:04,651 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 15:30:04,651 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 15:30:04,652 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:30:04,653 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-07-23 15:30:04,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:04,691 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-07-23 15:30:04,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 15:30:04,691 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-07-23 15:30:04,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:04,692 INFO L225 Difference]: With dead ends: 56 [2018-07-23 15:30:04,692 INFO L226 Difference]: Without dead ends: 55 [2018-07-23 15:30:04,693 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:30:04,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-07-23 15:30:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-07-23 15:30:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-07-23 15:30:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-07-23 15:30:04,697 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-07-23 15:30:04,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:04,698 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-07-23 15:30:04,698 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 15:30:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-07-23 15:30:04,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-07-23 15:30:04,702 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:04,702 INFO L353 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-07-23 15:30:04,702 INFO L414 AbstractCegarLoop]: === Iteration 53 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:04,702 INFO L82 PathProgramCache]: Analyzing trace with hash -373255149, now seen corresponding path program 52 times [2018-07-23 15:30:04,703 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:05,038 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 15:30:05,038 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:05,038 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-07-23 15:30:05,039 INFO L450 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-23 15:30:05,039 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-23 15:30:05,040 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:30:05,040 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-07-23 15:30:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:05,080 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-07-23 15:30:05,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-23 15:30:05,080 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-07-23 15:30:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:05,081 INFO L225 Difference]: With dead ends: 57 [2018-07-23 15:30:05,081 INFO L226 Difference]: Without dead ends: 56 [2018-07-23 15:30:05,082 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:30:05,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-07-23 15:30:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-07-23 15:30:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-07-23 15:30:05,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-07-23 15:30:05,084 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-07-23 15:30:05,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:05,085 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-07-23 15:30:05,085 INFO L472 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-23 15:30:05,085 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-07-23 15:30:05,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-23 15:30:05,085 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:05,086 INFO L353 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-07-23 15:30:05,086 INFO L414 AbstractCegarLoop]: === Iteration 54 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:05,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1313992504, now seen corresponding path program 53 times [2018-07-23 15:30:05,086 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:05,400 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 15:30:05,400 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:05,400 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-07-23 15:30:05,401 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 15:30:05,401 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 15:30:05,402 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:30:05,402 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-07-23 15:30:05,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:05,437 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-07-23 15:30:05,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 15:30:05,437 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-07-23 15:30:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:05,438 INFO L225 Difference]: With dead ends: 58 [2018-07-23 15:30:05,438 INFO L226 Difference]: Without dead ends: 57 [2018-07-23 15:30:05,439 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:30:05,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-23 15:30:05,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-07-23 15:30:05,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-07-23 15:30:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-07-23 15:30:05,441 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-07-23 15:30:05,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:05,442 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-07-23 15:30:05,442 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 15:30:05,442 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-07-23 15:30:05,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 15:30:05,443 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:05,443 INFO L353 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-07-23 15:30:05,444 INFO L414 AbstractCegarLoop]: === Iteration 55 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:05,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2079062195, now seen corresponding path program 54 times [2018-07-23 15:30:05,444 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:05,775 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 15:30:05,776 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:05,776 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-07-23 15:30:05,776 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 15:30:05,777 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 15:30:05,777 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:30:05,778 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-07-23 15:30:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:05,811 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-07-23 15:30:05,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-23 15:30:05,811 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-07-23 15:30:05,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:05,812 INFO L225 Difference]: With dead ends: 59 [2018-07-23 15:30:05,812 INFO L226 Difference]: Without dead ends: 58 [2018-07-23 15:30:05,813 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:30:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-07-23 15:30:05,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-07-23 15:30:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-07-23 15:30:05,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-07-23 15:30:05,816 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-07-23 15:30:05,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:05,816 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-07-23 15:30:05,817 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 15:30:05,817 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-07-23 15:30:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-07-23 15:30:05,817 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:05,817 INFO L353 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-07-23 15:30:05,817 INFO L414 AbstractCegarLoop]: === Iteration 56 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:05,818 INFO L82 PathProgramCache]: Analyzing trace with hash 26418840, now seen corresponding path program 55 times [2018-07-23 15:30:05,818 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:06,083 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 15:30:06,084 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:06,084 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-07-23 15:30:06,084 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 15:30:06,085 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 15:30:06,086 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:30:06,086 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-07-23 15:30:06,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:06,134 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-07-23 15:30:06,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 15:30:06,134 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-07-23 15:30:06,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:06,135 INFO L225 Difference]: With dead ends: 60 [2018-07-23 15:30:06,135 INFO L226 Difference]: Without dead ends: 59 [2018-07-23 15:30:06,136 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:30:06,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-07-23 15:30:06,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-07-23 15:30:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-07-23 15:30:06,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-07-23 15:30:06,140 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-07-23 15:30:06,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:06,140 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-07-23 15:30:06,140 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 15:30:06,141 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-07-23 15:30:06,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-23 15:30:06,141 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:06,141 INFO L353 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-07-23 15:30:06,141 INFO L414 AbstractCegarLoop]: === Iteration 57 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:06,142 INFO L82 PathProgramCache]: Analyzing trace with hash 818984275, now seen corresponding path program 56 times [2018-07-23 15:30:06,142 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:06,412 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 15:30:06,412 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:06,412 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-07-23 15:30:06,412 INFO L450 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-23 15:30:06,413 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-23 15:30:06,414 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:30:06,414 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-07-23 15:30:06,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:06,460 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-07-23 15:30:06,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 15:30:06,461 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-07-23 15:30:06,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:06,461 INFO L225 Difference]: With dead ends: 61 [2018-07-23 15:30:06,461 INFO L226 Difference]: Without dead ends: 60 [2018-07-23 15:30:06,463 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:30:06,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-07-23 15:30:06,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-07-23 15:30:06,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-07-23 15:30:06,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-07-23 15:30:06,465 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-07-23 15:30:06,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:06,466 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-07-23 15:30:06,466 INFO L472 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-23 15:30:06,466 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-07-23 15:30:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-07-23 15:30:06,466 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:06,467 INFO L353 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-07-23 15:30:06,467 INFO L414 AbstractCegarLoop]: === Iteration 58 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:06,467 INFO L82 PathProgramCache]: Analyzing trace with hash -381291016, now seen corresponding path program 57 times [2018-07-23 15:30:06,467 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:06,744 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 15:30:06,744 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:06,744 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-07-23 15:30:06,745 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-23 15:30:06,745 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-23 15:30:06,746 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:30:06,747 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-07-23 15:30:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:06,779 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-07-23 15:30:06,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 15:30:06,779 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-07-23 15:30:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:06,780 INFO L225 Difference]: With dead ends: 62 [2018-07-23 15:30:06,780 INFO L226 Difference]: Without dead ends: 61 [2018-07-23 15:30:06,781 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:30:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-07-23 15:30:06,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-07-23 15:30:06,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-07-23 15:30:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-07-23 15:30:06,784 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-07-23 15:30:06,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:06,784 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-07-23 15:30:06,785 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-23 15:30:06,785 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-07-23 15:30:06,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-07-23 15:30:06,785 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:06,785 INFO L353 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-07-23 15:30:06,786 INFO L414 AbstractCegarLoop]: === Iteration 59 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:06,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1064880627, now seen corresponding path program 58 times [2018-07-23 15:30:06,786 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:07,067 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 15:30:07,068 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:07,068 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-07-23 15:30:07,068 INFO L450 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-23 15:30:07,069 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-23 15:30:07,070 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:30:07,070 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-07-23 15:30:07,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:07,113 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-07-23 15:30:07,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-23 15:30:07,113 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-07-23 15:30:07,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:07,114 INFO L225 Difference]: With dead ends: 63 [2018-07-23 15:30:07,114 INFO L226 Difference]: Without dead ends: 62 [2018-07-23 15:30:07,115 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:30:07,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-07-23 15:30:07,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-07-23 15:30:07,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-07-23 15:30:07,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-07-23 15:30:07,119 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-07-23 15:30:07,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:07,119 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-07-23 15:30:07,119 INFO L472 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-23 15:30:07,120 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-07-23 15:30:07,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-07-23 15:30:07,120 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:07,120 INFO L353 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-07-23 15:30:07,121 INFO L414 AbstractCegarLoop]: === Iteration 60 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:07,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1348438696, now seen corresponding path program 59 times [2018-07-23 15:30:07,121 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:07,399 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 15:30:07,399 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:07,400 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-07-23 15:30:07,400 INFO L450 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-23 15:30:07,401 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-23 15:30:07,402 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:30:07,402 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-07-23 15:30:07,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:07,437 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-07-23 15:30:07,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 15:30:07,437 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-07-23 15:30:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:07,438 INFO L225 Difference]: With dead ends: 64 [2018-07-23 15:30:07,438 INFO L226 Difference]: Without dead ends: 63 [2018-07-23 15:30:07,439 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:30:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-07-23 15:30:07,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-07-23 15:30:07,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-07-23 15:30:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-07-23 15:30:07,442 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-07-23 15:30:07,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:07,442 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-07-23 15:30:07,442 INFO L472 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-23 15:30:07,443 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-07-23 15:30:07,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 15:30:07,443 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:07,443 INFO L353 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-07-23 15:30:07,443 INFO L414 AbstractCegarLoop]: === Iteration 61 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:07,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1148073619, now seen corresponding path program 60 times [2018-07-23 15:30:07,444 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:07,757 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 15:30:07,757 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:07,758 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-07-23 15:30:07,758 INFO L450 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-23 15:30:07,759 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-23 15:30:07,760 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:30:07,760 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-07-23 15:30:07,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:07,814 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-07-23 15:30:07,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-23 15:30:07,814 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-07-23 15:30:07,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:07,815 INFO L225 Difference]: With dead ends: 65 [2018-07-23 15:30:07,815 INFO L226 Difference]: Without dead ends: 64 [2018-07-23 15:30:07,817 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:30:07,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-07-23 15:30:07,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-07-23 15:30:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-07-23 15:30:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-07-23 15:30:07,820 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-07-23 15:30:07,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:07,821 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-07-23 15:30:07,821 INFO L472 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-23 15:30:07,821 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-07-23 15:30:07,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-07-23 15:30:07,821 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:07,822 INFO L353 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-07-23 15:30:07,822 INFO L414 AbstractCegarLoop]: === Iteration 62 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:07,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1230544056, now seen corresponding path program 61 times [2018-07-23 15:30:07,822 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:08,166 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 15:30:08,166 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:08,166 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-07-23 15:30:08,167 INFO L450 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-23 15:30:08,167 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-23 15:30:08,168 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:30:08,168 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-07-23 15:30:08,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:08,206 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-07-23 15:30:08,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 15:30:08,206 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-07-23 15:30:08,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:08,207 INFO L225 Difference]: With dead ends: 66 [2018-07-23 15:30:08,207 INFO L226 Difference]: Without dead ends: 65 [2018-07-23 15:30:08,208 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:30:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-07-23 15:30:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-07-23 15:30:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-07-23 15:30:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-07-23 15:30:08,210 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-07-23 15:30:08,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:08,211 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-07-23 15:30:08,211 INFO L472 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-23 15:30:08,211 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-07-23 15:30:08,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-23 15:30:08,211 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:08,211 INFO L353 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-07-23 15:30:08,212 INFO L414 AbstractCegarLoop]: === Iteration 63 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:08,212 INFO L82 PathProgramCache]: Analyzing trace with hash -507839693, now seen corresponding path program 62 times [2018-07-23 15:30:08,212 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:08,465 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 15:30:08,465 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:08,466 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-07-23 15:30:08,466 INFO L450 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-23 15:30:08,467 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-23 15:30:08,467 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:30:08,467 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-07-23 15:30:08,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:08,518 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-07-23 15:30:08,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-23 15:30:08,518 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-07-23 15:30:08,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:08,519 INFO L225 Difference]: With dead ends: 67 [2018-07-23 15:30:08,519 INFO L226 Difference]: Without dead ends: 66 [2018-07-23 15:30:08,520 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:30:08,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-07-23 15:30:08,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-07-23 15:30:08,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-07-23 15:30:08,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-07-23 15:30:08,523 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-07-23 15:30:08,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:08,523 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-07-23 15:30:08,523 INFO L472 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-23 15:30:08,523 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-07-23 15:30:08,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-07-23 15:30:08,524 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:08,524 INFO L353 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-07-23 15:30:08,524 INFO L414 AbstractCegarLoop]: === Iteration 64 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:08,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1436838936, now seen corresponding path program 63 times [2018-07-23 15:30:08,524 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:08,789 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 15:30:08,790 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:08,790 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-07-23 15:30:08,790 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-23 15:30:08,791 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-23 15:30:08,791 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:30:08,791 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-07-23 15:30:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:08,831 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-07-23 15:30:08,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 15:30:08,831 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-07-23 15:30:08,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:08,832 INFO L225 Difference]: With dead ends: 68 [2018-07-23 15:30:08,832 INFO L226 Difference]: Without dead ends: 67 [2018-07-23 15:30:08,833 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:30:08,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-07-23 15:30:08,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-07-23 15:30:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-07-23 15:30:08,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-07-23 15:30:08,837 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-07-23 15:30:08,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:08,837 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-07-23 15:30:08,837 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-23 15:30:08,838 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-07-23 15:30:08,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-07-23 15:30:08,838 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:08,838 INFO L353 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-07-23 15:30:08,838 INFO L414 AbstractCegarLoop]: === Iteration 65 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:08,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1592334291, now seen corresponding path program 64 times [2018-07-23 15:30:08,839 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:09,112 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 15:30:09,113 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:09,113 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-07-23 15:30:09,113 INFO L450 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-23 15:30:09,114 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-23 15:30:09,114 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:30:09,114 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-07-23 15:30:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:09,163 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-07-23 15:30:09,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-07-23 15:30:09,163 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-07-23 15:30:09,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:09,164 INFO L225 Difference]: With dead ends: 69 [2018-07-23 15:30:09,164 INFO L226 Difference]: Without dead ends: 68 [2018-07-23 15:30:09,165 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:30:09,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-07-23 15:30:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-07-23 15:30:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-07-23 15:30:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-07-23 15:30:09,168 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-07-23 15:30:09,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:09,168 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-07-23 15:30:09,168 INFO L472 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-23 15:30:09,168 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-07-23 15:30:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-07-23 15:30:09,169 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:09,169 INFO L353 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-07-23 15:30:09,170 INFO L414 AbstractCegarLoop]: === Iteration 66 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:09,170 INFO L82 PathProgramCache]: Analyzing trace with hash 2117723000, now seen corresponding path program 65 times [2018-07-23 15:30:09,170 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:09,445 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 15:30:09,445 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:09,445 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-07-23 15:30:09,446 INFO L450 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-23 15:30:09,446 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-23 15:30:09,447 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:30:09,447 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-07-23 15:30:09,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:09,510 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-07-23 15:30:09,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 15:30:09,510 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-07-23 15:30:09,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:09,511 INFO L225 Difference]: With dead ends: 70 [2018-07-23 15:30:09,511 INFO L226 Difference]: Without dead ends: 69 [2018-07-23 15:30:09,512 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:30:09,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-07-23 15:30:09,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-07-23 15:30:09,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-07-23 15:30:09,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-07-23 15:30:09,515 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-07-23 15:30:09,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:09,515 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-07-23 15:30:09,515 INFO L472 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-23 15:30:09,515 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-07-23 15:30:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 15:30:09,516 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:09,516 INFO L353 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-07-23 15:30:09,516 INFO L414 AbstractCegarLoop]: === Iteration 67 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:09,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1224903795, now seen corresponding path program 66 times [2018-07-23 15:30:09,516 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:09,812 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 15:30:09,813 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:09,813 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-07-23 15:30:09,813 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-23 15:30:09,814 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-23 15:30:09,814 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:30:09,815 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-07-23 15:30:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:09,851 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-07-23 15:30:09,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-23 15:30:09,852 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-07-23 15:30:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:09,852 INFO L225 Difference]: With dead ends: 71 [2018-07-23 15:30:09,852 INFO L226 Difference]: Without dead ends: 70 [2018-07-23 15:30:09,853 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:30:09,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-07-23 15:30:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-07-23 15:30:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-07-23 15:30:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-07-23 15:30:09,856 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-07-23 15:30:09,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:09,856 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-07-23 15:30:09,856 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-23 15:30:09,857 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-07-23 15:30:09,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-07-23 15:30:09,857 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:09,857 INFO L353 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-07-23 15:30:09,857 INFO L414 AbstractCegarLoop]: === Iteration 68 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:09,858 INFO L82 PathProgramCache]: Analyzing trace with hash -682687784, now seen corresponding path program 67 times [2018-07-23 15:30:09,858 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 15:30:10,164 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 15:30:10,165 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:10,165 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-07-23 15:30:10,165 INFO L450 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-23 15:30:10,166 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-23 15:30:10,167 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:30:10,167 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-07-23 15:30:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:10,230 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-07-23 15:30:10,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 15:30:10,230 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-07-23 15:30:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:10,231 INFO L225 Difference]: With dead ends: 72 [2018-07-23 15:30:10,231 INFO L226 Difference]: Without dead ends: 71 [2018-07-23 15:30:10,232 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:30:10,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-07-23 15:30:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-07-23 15:30:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 15:30:10,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-07-23 15:30:10,235 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-07-23 15:30:10,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:10,235 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-07-23 15:30:10,235 INFO L472 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-23 15:30:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-07-23 15:30:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-07-23 15:30:10,236 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:10,236 INFO L353 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-07-23 15:30:10,236 INFO L414 AbstractCegarLoop]: === Iteration 69 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:10,236 INFO L82 PathProgramCache]: Analyzing trace with hash 311515411, now seen corresponding path program 68 times [2018-07-23 15:30:10,236 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:10,594 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 15:30:10,595 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:10,595 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-07-23 15:30:10,595 INFO L450 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-23 15:30:10,596 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-23 15:30:10,597 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:30:10,597 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-07-23 15:30:10,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:10,662 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-07-23 15:30:10,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-23 15:30:10,662 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-07-23 15:30:10,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:10,663 INFO L225 Difference]: With dead ends: 73 [2018-07-23 15:30:10,663 INFO L226 Difference]: Without dead ends: 72 [2018-07-23 15:30:10,664 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:30:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-07-23 15:30:10,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-07-23 15:30:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-07-23 15:30:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-07-23 15:30:10,667 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-07-23 15:30:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:10,667 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-07-23 15:30:10,668 INFO L472 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-23 15:30:10,668 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-07-23 15:30:10,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-07-23 15:30:10,668 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:10,668 INFO L353 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-07-23 15:30:10,669 INFO L414 AbstractCegarLoop]: === Iteration 70 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:10,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1067043384, now seen corresponding path program 69 times [2018-07-23 15:30:10,669 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:10,977 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 15:30:10,978 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:10,978 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-07-23 15:30:10,978 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 15:30:10,979 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 15:30:10,980 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:30:10,980 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-07-23 15:30:11,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:11,048 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-07-23 15:30:11,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 15:30:11,049 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-07-23 15:30:11,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:11,049 INFO L225 Difference]: With dead ends: 74 [2018-07-23 15:30:11,050 INFO L226 Difference]: Without dead ends: 73 [2018-07-23 15:30:11,050 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:30:11,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-07-23 15:30:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-07-23 15:30:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-07-23 15:30:11,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-07-23 15:30:11,053 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-07-23 15:30:11,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:11,054 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-07-23 15:30:11,054 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 15:30:11,054 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-07-23 15:30:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-07-23 15:30:11,055 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:11,055 INFO L353 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-07-23 15:30:11,055 INFO L414 AbstractCegarLoop]: === Iteration 71 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:11,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1281393229, now seen corresponding path program 70 times [2018-07-23 15:30:11,055 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:11,368 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 15:30:11,368 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:11,368 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-07-23 15:30:11,369 INFO L450 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-23 15:30:11,370 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-23 15:30:11,370 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:30:11,370 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-07-23 15:30:11,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:11,434 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-07-23 15:30:11,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-07-23 15:30:11,434 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-07-23 15:30:11,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:11,435 INFO L225 Difference]: With dead ends: 75 [2018-07-23 15:30:11,435 INFO L226 Difference]: Without dead ends: 74 [2018-07-23 15:30:11,436 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:30:11,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-07-23 15:30:11,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-07-23 15:30:11,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-07-23 15:30:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-07-23 15:30:11,439 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-07-23 15:30:11,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:11,439 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-07-23 15:30:11,439 INFO L472 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-23 15:30:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-07-23 15:30:11,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-07-23 15:30:11,440 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:11,440 INFO L353 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-07-23 15:30:11,440 INFO L414 AbstractCegarLoop]: === Iteration 72 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:11,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1068484200, now seen corresponding path program 71 times [2018-07-23 15:30:11,441 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:11,759 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 15:30:11,760 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:11,760 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-07-23 15:30:11,764 INFO L450 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-23 15:30:11,765 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-23 15:30:11,766 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:30:11,766 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-07-23 15:30:11,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:11,820 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-07-23 15:30:11,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 15:30:11,820 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-07-23 15:30:11,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:11,821 INFO L225 Difference]: With dead ends: 76 [2018-07-23 15:30:11,821 INFO L226 Difference]: Without dead ends: 75 [2018-07-23 15:30:11,822 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:30:11,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-07-23 15:30:11,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-07-23 15:30:11,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-07-23 15:30:11,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-07-23 15:30:11,825 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-07-23 15:30:11,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:11,825 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-07-23 15:30:11,825 INFO L472 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-23 15:30:11,825 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-07-23 15:30:11,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 15:30:11,826 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:11,826 INFO L353 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-07-23 15:30:11,826 INFO L414 AbstractCegarLoop]: === Iteration 73 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:11,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1236728403, now seen corresponding path program 72 times [2018-07-23 15:30:11,827 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:12,131 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 15:30:12,131 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:12,131 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-07-23 15:30:12,132 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-23 15:30:12,133 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-23 15:30:12,133 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:30:12,133 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-07-23 15:30:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:12,178 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-07-23 15:30:12,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-23 15:30:12,178 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-07-23 15:30:12,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:12,179 INFO L225 Difference]: With dead ends: 77 [2018-07-23 15:30:12,179 INFO L226 Difference]: Without dead ends: 76 [2018-07-23 15:30:12,180 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:30:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-07-23 15:30:12,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-07-23 15:30:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-07-23 15:30:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-07-23 15:30:12,183 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-07-23 15:30:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:12,183 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-07-23 15:30:12,183 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-23 15:30:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-07-23 15:30:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-07-23 15:30:12,184 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:12,184 INFO L353 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-07-23 15:30:12,184 INFO L414 AbstractCegarLoop]: === Iteration 74 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:12,184 INFO L82 PathProgramCache]: Analyzing trace with hash -316124936, now seen corresponding path program 73 times [2018-07-23 15:30:12,184 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:12,496 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 15:30:12,496 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:12,496 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-07-23 15:30:12,497 INFO L450 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-23 15:30:12,498 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-23 15:30:12,498 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:30:12,498 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-07-23 15:30:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:12,543 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-07-23 15:30:12,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 15:30:12,543 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-07-23 15:30:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:12,544 INFO L225 Difference]: With dead ends: 78 [2018-07-23 15:30:12,544 INFO L226 Difference]: Without dead ends: 77 [2018-07-23 15:30:12,545 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:30:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-07-23 15:30:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-07-23 15:30:12,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-07-23 15:30:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-07-23 15:30:12,548 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-07-23 15:30:12,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:12,548 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-07-23 15:30:12,548 INFO L472 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-23 15:30:12,548 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-07-23 15:30:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-07-23 15:30:12,549 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:12,549 INFO L353 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-07-23 15:30:12,549 INFO L414 AbstractCegarLoop]: === Iteration 75 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:12,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1209938189, now seen corresponding path program 74 times [2018-07-23 15:30:12,550 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:12,894 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 15:30:12,895 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:12,895 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-07-23 15:30:12,896 INFO L450 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-23 15:30:12,897 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-23 15:30:12,897 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:30:12,898 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-07-23 15:30:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:12,950 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-07-23 15:30:12,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-07-23 15:30:12,951 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-07-23 15:30:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:12,952 INFO L225 Difference]: With dead ends: 79 [2018-07-23 15:30:12,952 INFO L226 Difference]: Without dead ends: 78 [2018-07-23 15:30:12,953 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:30:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-07-23 15:30:12,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-07-23 15:30:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-07-23 15:30:12,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-07-23 15:30:12,957 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-07-23 15:30:12,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:12,957 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-07-23 15:30:12,957 INFO L472 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-23 15:30:12,957 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-07-23 15:30:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-07-23 15:30:12,958 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:12,958 INFO L353 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-07-23 15:30:12,959 INFO L414 AbstractCegarLoop]: === Iteration 76 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:12,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1146622040, now seen corresponding path program 75 times [2018-07-23 15:30:12,959 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:13,378 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 15:30:13,379 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:13,379 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-07-23 15:30:13,379 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-23 15:30:13,381 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-23 15:30:13,382 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:30:13,382 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-07-23 15:30:13,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:13,438 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-07-23 15:30:13,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 15:30:13,439 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-07-23 15:30:13,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:13,439 INFO L225 Difference]: With dead ends: 80 [2018-07-23 15:30:13,440 INFO L226 Difference]: Without dead ends: 79 [2018-07-23 15:30:13,441 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:30:13,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-07-23 15:30:13,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-07-23 15:30:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-07-23 15:30:13,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-07-23 15:30:13,444 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-07-23 15:30:13,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:13,444 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-07-23 15:30:13,444 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-23 15:30:13,445 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-07-23 15:30:13,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-07-23 15:30:13,445 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:13,445 INFO L353 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-07-23 15:30:13,446 INFO L414 AbstractCegarLoop]: === Iteration 77 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:13,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1185545107, now seen corresponding path program 76 times [2018-07-23 15:30:13,446 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:13,815 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 15:30:13,816 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:13,816 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-07-23 15:30:13,816 INFO L450 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-23 15:30:13,817 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-23 15:30:13,818 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:30:13,818 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-07-23 15:30:13,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:13,902 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-07-23 15:30:13,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-23 15:30:13,902 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-07-23 15:30:13,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:13,903 INFO L225 Difference]: With dead ends: 81 [2018-07-23 15:30:13,903 INFO L226 Difference]: Without dead ends: 80 [2018-07-23 15:30:13,904 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:30:13,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-07-23 15:30:13,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-07-23 15:30:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 15:30:13,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-07-23 15:30:13,907 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-07-23 15:30:13,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:13,907 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-07-23 15:30:13,907 INFO L472 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-23 15:30:13,907 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-07-23 15:30:13,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-07-23 15:30:13,908 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:13,908 INFO L353 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-07-23 15:30:13,908 INFO L414 AbstractCegarLoop]: === Iteration 78 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:13,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1902807112, now seen corresponding path program 77 times [2018-07-23 15:30:13,909 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:14,257 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 15:30:14,258 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:14,258 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-07-23 15:30:14,258 INFO L450 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-23 15:30:14,259 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-23 15:30:14,260 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:30:14,260 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-07-23 15:30:14,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:14,344 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-07-23 15:30:14,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 15:30:14,345 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-07-23 15:30:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:14,345 INFO L225 Difference]: With dead ends: 82 [2018-07-23 15:30:14,346 INFO L226 Difference]: Without dead ends: 81 [2018-07-23 15:30:14,346 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:30:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-07-23 15:30:14,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-07-23 15:30:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-07-23 15:30:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-07-23 15:30:14,349 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-07-23 15:30:14,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:14,349 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-07-23 15:30:14,349 INFO L472 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-23 15:30:14,350 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-07-23 15:30:14,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 15:30:14,350 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:14,350 INFO L353 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-07-23 15:30:14,350 INFO L414 AbstractCegarLoop]: === Iteration 79 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:14,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1142521907, now seen corresponding path program 78 times [2018-07-23 15:30:14,351 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:14,688 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 15:30:14,688 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:14,688 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-07-23 15:30:14,689 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-23 15:30:14,689 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-23 15:30:14,690 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:30:14,690 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-07-23 15:30:14,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:14,789 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-07-23 15:30:14,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-23 15:30:14,789 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-07-23 15:30:14,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:14,790 INFO L225 Difference]: With dead ends: 83 [2018-07-23 15:30:14,790 INFO L226 Difference]: Without dead ends: 82 [2018-07-23 15:30:14,791 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:30:14,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-07-23 15:30:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-07-23 15:30:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-07-23 15:30:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-07-23 15:30:14,794 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-07-23 15:30:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:14,794 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-07-23 15:30:14,794 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-23 15:30:14,794 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-07-23 15:30:14,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-07-23 15:30:14,795 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:14,795 INFO L353 BasicCegarLoop]: trace histogram [79, 1, 1] [2018-07-23 15:30:14,795 INFO L414 AbstractCegarLoop]: === Iteration 80 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:14,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1058440984, now seen corresponding path program 79 times [2018-07-23 15:30:14,796 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:15,160 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 15:30:15,160 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:15,160 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-07-23 15:30:15,160 INFO L450 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-23 15:30:15,161 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-23 15:30:15,162 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:30:15,162 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-07-23 15:30:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:15,237 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-07-23 15:30:15,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 15:30:15,238 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-07-23 15:30:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:15,238 INFO L225 Difference]: With dead ends: 84 [2018-07-23 15:30:15,238 INFO L226 Difference]: Without dead ends: 83 [2018-07-23 15:30:15,239 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:30:15,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-07-23 15:30:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-07-23 15:30:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-07-23 15:30:15,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-07-23 15:30:15,242 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-07-23 15:30:15,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:15,242 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-07-23 15:30:15,242 INFO L472 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-23 15:30:15,243 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-07-23 15:30:15,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-07-23 15:30:15,243 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:15,243 INFO L353 BasicCegarLoop]: trace histogram [80, 1, 1] [2018-07-23 15:30:15,243 INFO L414 AbstractCegarLoop]: === Iteration 81 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:15,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1548067629, now seen corresponding path program 80 times [2018-07-23 15:30:15,244 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:15,598 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 15:30:15,599 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:15,599 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-07-23 15:30:15,599 INFO L450 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-07-23 15:30:15,600 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-07-23 15:30:15,601 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:30:15,601 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-07-23 15:30:15,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:15,653 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-07-23 15:30:15,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-23 15:30:15,653 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-07-23 15:30:15,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:15,654 INFO L225 Difference]: With dead ends: 85 [2018-07-23 15:30:15,654 INFO L226 Difference]: Without dead ends: 84 [2018-07-23 15:30:15,655 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:30:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-07-23 15:30:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-07-23 15:30:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-07-23 15:30:15,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-07-23 15:30:15,658 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-07-23 15:30:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:15,658 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-07-23 15:30:15,658 INFO L472 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-07-23 15:30:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-07-23 15:30:15,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-07-23 15:30:15,659 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:15,659 INFO L353 BasicCegarLoop]: trace histogram [81, 1, 1] [2018-07-23 15:30:15,659 INFO L414 AbstractCegarLoop]: === Iteration 82 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:15,659 INFO L82 PathProgramCache]: Analyzing trace with hash -745456008, now seen corresponding path program 81 times [2018-07-23 15:30:15,660 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:15,999 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 15:30:15,999 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:15,999 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-07-23 15:30:15,999 INFO L450 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-23 15:30:16,000 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-23 15:30:16,001 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:30:16,001 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-07-23 15:30:16,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:16,090 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-07-23 15:30:16,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 15:30:16,090 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-07-23 15:30:16,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:16,091 INFO L225 Difference]: With dead ends: 86 [2018-07-23 15:30:16,091 INFO L226 Difference]: Without dead ends: 85 [2018-07-23 15:30:16,092 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:30:16,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-07-23 15:30:16,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-07-23 15:30:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-07-23 15:30:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-07-23 15:30:16,094 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-07-23 15:30:16,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:16,095 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-07-23 15:30:16,095 INFO L472 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-23 15:30:16,095 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-07-23 15:30:16,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-07-23 15:30:16,096 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:16,096 INFO L353 BasicCegarLoop]: trace histogram [82, 1, 1] [2018-07-23 15:30:16,096 INFO L414 AbstractCegarLoop]: === Iteration 83 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:16,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1634299533, now seen corresponding path program 82 times [2018-07-23 15:30:16,096 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:16,431 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 15:30:16,431 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:16,432 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-07-23 15:30:16,432 INFO L450 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-07-23 15:30:16,432 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-07-23 15:30:16,433 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:30:16,433 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-07-23 15:30:16,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:16,524 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-07-23 15:30:16,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-23 15:30:16,525 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-07-23 15:30:16,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:16,525 INFO L225 Difference]: With dead ends: 87 [2018-07-23 15:30:16,526 INFO L226 Difference]: Without dead ends: 86 [2018-07-23 15:30:16,526 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:30:16,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-07-23 15:30:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-07-23 15:30:16,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-07-23 15:30:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-07-23 15:30:16,529 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-07-23 15:30:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:16,530 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-07-23 15:30:16,530 INFO L472 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-07-23 15:30:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-07-23 15:30:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-07-23 15:30:16,530 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:16,530 INFO L353 BasicCegarLoop]: trace histogram [83, 1, 1] [2018-07-23 15:30:16,531 INFO L414 AbstractCegarLoop]: === Iteration 84 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:16,531 INFO L82 PathProgramCache]: Analyzing trace with hash 876322264, now seen corresponding path program 83 times [2018-07-23 15:30:16,531 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:16,847 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 15:30:16,848 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:16,848 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-07-23 15:30:16,848 INFO L450 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-23 15:30:16,849 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-23 15:30:16,849 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:30:16,849 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-07-23 15:30:16,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:16,896 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-07-23 15:30:16,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 15:30:16,896 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-07-23 15:30:16,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:16,897 INFO L225 Difference]: With dead ends: 88 [2018-07-23 15:30:16,897 INFO L226 Difference]: Without dead ends: 87 [2018-07-23 15:30:16,898 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:30:16,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-07-23 15:30:16,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-07-23 15:30:16,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-07-23 15:30:16,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-07-23 15:30:16,901 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-07-23 15:30:16,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:16,901 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-07-23 15:30:16,901 INFO L472 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-23 15:30:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-07-23 15:30:16,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-23 15:30:16,902 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:16,902 INFO L353 BasicCegarLoop]: trace histogram [84, 1, 1] [2018-07-23 15:30:16,902 INFO L414 AbstractCegarLoop]: === Iteration 85 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:16,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1396186643, now seen corresponding path program 84 times [2018-07-23 15:30:16,902 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:17,169 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 15:30:17,169 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:17,169 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-07-23 15:30:17,170 INFO L450 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-23 15:30:17,170 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-23 15:30:17,171 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:30:17,171 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-07-23 15:30:17,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:17,278 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-07-23 15:30:17,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-23 15:30:17,278 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-07-23 15:30:17,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:17,279 INFO L225 Difference]: With dead ends: 89 [2018-07-23 15:30:17,279 INFO L226 Difference]: Without dead ends: 88 [2018-07-23 15:30:17,280 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:30:17,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-07-23 15:30:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-07-23 15:30:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-07-23 15:30:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-07-23 15:30:17,284 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-07-23 15:30:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:17,284 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-07-23 15:30:17,284 INFO L472 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-23 15:30:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-07-23 15:30:17,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-07-23 15:30:17,286 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:17,286 INFO L353 BasicCegarLoop]: trace histogram [85, 1, 1] [2018-07-23 15:30:17,286 INFO L414 AbstractCegarLoop]: === Iteration 86 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:17,287 INFO L82 PathProgramCache]: Analyzing trace with hash 332113208, now seen corresponding path program 85 times [2018-07-23 15:30:17,287 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:17,544 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 15:30:17,545 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:17,545 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-07-23 15:30:17,545 INFO L450 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-23 15:30:17,546 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-23 15:30:17,546 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:30:17,546 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-07-23 15:30:17,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:17,591 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-07-23 15:30:17,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 15:30:17,591 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-07-23 15:30:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:17,592 INFO L225 Difference]: With dead ends: 90 [2018-07-23 15:30:17,592 INFO L226 Difference]: Without dead ends: 89 [2018-07-23 15:30:17,593 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:30:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-07-23 15:30:17,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-07-23 15:30:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 15:30:17,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-07-23 15:30:17,596 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-07-23 15:30:17,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:17,596 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-07-23 15:30:17,596 INFO L472 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-23 15:30:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-07-23 15:30:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-07-23 15:30:17,597 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:17,597 INFO L353 BasicCegarLoop]: trace histogram [86, 1, 1] [2018-07-23 15:30:17,597 INFO L414 AbstractCegarLoop]: === Iteration 87 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:17,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1705575091, now seen corresponding path program 86 times [2018-07-23 15:30:17,597 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:17,850 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 15:30:17,850 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:17,850 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-07-23 15:30:17,851 INFO L450 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-07-23 15:30:17,852 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-07-23 15:30:17,852 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:30:17,852 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-07-23 15:30:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:17,961 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-07-23 15:30:17,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-07-23 15:30:17,961 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-07-23 15:30:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:17,962 INFO L225 Difference]: With dead ends: 91 [2018-07-23 15:30:17,962 INFO L226 Difference]: Without dead ends: 90 [2018-07-23 15:30:17,963 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:30:17,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-07-23 15:30:17,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-07-23 15:30:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-07-23 15:30:17,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-07-23 15:30:17,966 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-07-23 15:30:17,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:17,966 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-07-23 15:30:17,966 INFO L472 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-07-23 15:30:17,966 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-07-23 15:30:17,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-07-23 15:30:17,967 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:17,967 INFO L353 BasicCegarLoop]: trace histogram [87, 1, 1] [2018-07-23 15:30:17,967 INFO L414 AbstractCegarLoop]: === Iteration 88 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:17,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1333220504, now seen corresponding path program 87 times [2018-07-23 15:30:17,968 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:18,366 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 15:30:18,367 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:18,367 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-07-23 15:30:18,367 INFO L450 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-23 15:30:18,368 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-23 15:30:18,369 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:30:18,369 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-07-23 15:30:18,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:18,436 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-07-23 15:30:18,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 15:30:18,437 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-07-23 15:30:18,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:18,437 INFO L225 Difference]: With dead ends: 92 [2018-07-23 15:30:18,438 INFO L226 Difference]: Without dead ends: 91 [2018-07-23 15:30:18,438 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:30:18,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-07-23 15:30:18,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-07-23 15:30:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-07-23 15:30:18,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-07-23 15:30:18,441 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-07-23 15:30:18,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:18,442 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-07-23 15:30:18,442 INFO L472 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-23 15:30:18,442 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-07-23 15:30:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-07-23 15:30:18,444 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:18,445 INFO L353 BasicCegarLoop]: trace histogram [88, 1, 1] [2018-07-23 15:30:18,445 INFO L414 AbstractCegarLoop]: === Iteration 89 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:18,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1619837101, now seen corresponding path program 88 times [2018-07-23 15:30:18,445 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:18,988 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 15:30:18,989 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:18,989 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-07-23 15:30:18,989 INFO L450 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-07-23 15:30:18,990 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-07-23 15:30:18,991 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:30:18,991 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-07-23 15:30:19,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:19,128 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-07-23 15:30:19,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-07-23 15:30:19,129 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-07-23 15:30:19,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:19,130 INFO L225 Difference]: With dead ends: 93 [2018-07-23 15:30:19,130 INFO L226 Difference]: Without dead ends: 92 [2018-07-23 15:30:19,131 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:30:19,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-07-23 15:30:19,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-07-23 15:30:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-07-23 15:30:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-07-23 15:30:19,134 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-07-23 15:30:19,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:19,135 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-07-23 15:30:19,135 INFO L472 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-07-23 15:30:19,135 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-07-23 15:30:19,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-07-23 15:30:19,136 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:19,136 INFO L353 BasicCegarLoop]: trace histogram [89, 1, 1] [2018-07-23 15:30:19,136 INFO L414 AbstractCegarLoop]: === Iteration 90 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:19,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1324657656, now seen corresponding path program 89 times [2018-07-23 15:30:19,137 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:19,504 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 15:30:19,504 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:19,504 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2018-07-23 15:30:19,505 INFO L450 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-23 15:30:19,505 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-23 15:30:19,506 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:30:19,506 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-07-23 15:30:19,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:19,574 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-07-23 15:30:19,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 15:30:19,575 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-07-23 15:30:19,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:19,576 INFO L225 Difference]: With dead ends: 94 [2018-07-23 15:30:19,576 INFO L226 Difference]: Without dead ends: 93 [2018-07-23 15:30:19,576 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:30:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-07-23 15:30:19,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-07-23 15:30:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-07-23 15:30:19,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-07-23 15:30:19,586 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-07-23 15:30:19,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:19,586 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-07-23 15:30:19,587 INFO L472 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-23 15:30:19,587 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-07-23 15:30:19,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-07-23 15:30:19,587 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:19,590 INFO L353 BasicCegarLoop]: trace histogram [90, 1, 1] [2018-07-23 15:30:19,590 INFO L414 AbstractCegarLoop]: === Iteration 91 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:19,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1885285389, now seen corresponding path program 90 times [2018-07-23 15:30:19,590 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:20,023 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 15:30:20,023 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:20,024 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-07-23 15:30:20,024 INFO L450 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-23 15:30:20,025 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-23 15:30:20,026 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:30:20,026 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-07-23 15:30:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:20,135 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-07-23 15:30:20,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-07-23 15:30:20,135 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-07-23 15:30:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:20,136 INFO L225 Difference]: With dead ends: 95 [2018-07-23 15:30:20,136 INFO L226 Difference]: Without dead ends: 94 [2018-07-23 15:30:20,137 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:30:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-07-23 15:30:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-07-23 15:30:20,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-07-23 15:30:20,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-07-23 15:30:20,140 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-07-23 15:30:20,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:20,140 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-07-23 15:30:20,140 INFO L472 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-23 15:30:20,140 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-07-23 15:30:20,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-07-23 15:30:20,141 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:20,141 INFO L353 BasicCegarLoop]: trace histogram [91, 1, 1] [2018-07-23 15:30:20,141 INFO L414 AbstractCegarLoop]: === Iteration 92 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:20,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1685695320, now seen corresponding path program 91 times [2018-07-23 15:30:20,142 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:20,442 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 15:30:20,442 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:20,442 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-07-23 15:30:20,443 INFO L450 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-23 15:30:20,444 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-23 15:30:20,444 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:30:20,444 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-07-23 15:30:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:20,529 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-07-23 15:30:20,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 15:30:20,529 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-07-23 15:30:20,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:20,530 INFO L225 Difference]: With dead ends: 96 [2018-07-23 15:30:20,530 INFO L226 Difference]: Without dead ends: 95 [2018-07-23 15:30:20,531 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:30:20,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-07-23 15:30:20,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-07-23 15:30:20,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-07-23 15:30:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-07-23 15:30:20,534 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-07-23 15:30:20,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:20,534 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-07-23 15:30:20,534 INFO L472 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-23 15:30:20,535 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-07-23 15:30:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-07-23 15:30:20,535 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:20,535 INFO L353 BasicCegarLoop]: trace histogram [92, 1, 1] [2018-07-23 15:30:20,536 INFO L414 AbstractCegarLoop]: === Iteration 93 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:20,536 INFO L82 PathProgramCache]: Analyzing trace with hash 716947603, now seen corresponding path program 92 times [2018-07-23 15:30:20,536 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:20,826 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 15:30:20,826 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:20,827 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-07-23 15:30:20,827 INFO L450 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-07-23 15:30:20,828 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-07-23 15:30:20,828 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:30:20,828 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-07-23 15:30:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:20,880 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-07-23 15:30:20,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-07-23 15:30:20,881 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-07-23 15:30:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:20,881 INFO L225 Difference]: With dead ends: 97 [2018-07-23 15:30:20,882 INFO L226 Difference]: Without dead ends: 96 [2018-07-23 15:30:20,882 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:30:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-07-23 15:30:20,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-07-23 15:30:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-07-23 15:30:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-07-23 15:30:20,885 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-07-23 15:30:20,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:20,885 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-07-23 15:30:20,886 INFO L472 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-07-23 15:30:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-07-23 15:30:20,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-07-23 15:30:20,886 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:20,886 INFO L353 BasicCegarLoop]: trace histogram [93, 1, 1] [2018-07-23 15:30:20,887 INFO L414 AbstractCegarLoop]: === Iteration 94 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:20,887 INFO L82 PathProgramCache]: Analyzing trace with hash 750539448, now seen corresponding path program 93 times [2018-07-23 15:30:20,887 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:21,225 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 15:30:21,226 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:21,226 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2018-07-23 15:30:21,226 INFO L450 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-23 15:30:21,227 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-23 15:30:21,227 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:30:21,227 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-07-23 15:30:21,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:21,292 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-07-23 15:30:21,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-23 15:30:21,293 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-07-23 15:30:21,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:21,294 INFO L225 Difference]: With dead ends: 98 [2018-07-23 15:30:21,294 INFO L226 Difference]: Without dead ends: 97 [2018-07-23 15:30:21,294 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:30:21,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-07-23 15:30:21,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-07-23 15:30:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-07-23 15:30:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-07-23 15:30:21,297 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-07-23 15:30:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:21,298 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-07-23 15:30:21,298 INFO L472 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-23 15:30:21,298 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-07-23 15:30:21,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-07-23 15:30:21,298 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:21,299 INFO L353 BasicCegarLoop]: trace histogram [94, 1, 1] [2018-07-23 15:30:21,299 INFO L414 AbstractCegarLoop]: === Iteration 95 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:21,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1791886643, now seen corresponding path program 94 times [2018-07-23 15:30:21,299 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:21,639 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 15:30:21,639 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:21,640 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-07-23 15:30:21,640 INFO L450 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-07-23 15:30:21,641 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-07-23 15:30:21,641 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:30:21,642 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-07-23 15:30:21,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:21,731 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-07-23 15:30:21,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-23 15:30:21,731 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-07-23 15:30:21,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:21,732 INFO L225 Difference]: With dead ends: 99 [2018-07-23 15:30:21,732 INFO L226 Difference]: Without dead ends: 98 [2018-07-23 15:30:21,733 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:30:21,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-07-23 15:30:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-07-23 15:30:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 15:30:21,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-07-23 15:30:21,736 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-07-23 15:30:21,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:21,736 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-07-23 15:30:21,736 INFO L472 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-07-23 15:30:21,736 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-07-23 15:30:21,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-07-23 15:30:21,737 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:21,737 INFO L353 BasicCegarLoop]: trace histogram [95, 1, 1] [2018-07-23 15:30:21,737 INFO L414 AbstractCegarLoop]: === Iteration 96 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:21,737 INFO L82 PathProgramCache]: Analyzing trace with hash -286088680, now seen corresponding path program 95 times [2018-07-23 15:30:21,737 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:22,138 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 15:30:22,138 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:22,139 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-07-23 15:30:22,139 INFO L450 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-07-23 15:30:22,140 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-07-23 15:30:22,140 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:30:22,141 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-07-23 15:30:22,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:22,247 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-07-23 15:30:22,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-23 15:30:22,247 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-07-23 15:30:22,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:22,248 INFO L225 Difference]: With dead ends: 100 [2018-07-23 15:30:22,248 INFO L226 Difference]: Without dead ends: 99 [2018-07-23 15:30:22,249 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:30:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-07-23 15:30:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-07-23 15:30:22,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-07-23 15:30:22,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-07-23 15:30:22,252 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-07-23 15:30:22,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:22,252 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-07-23 15:30:22,252 INFO L472 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-07-23 15:30:22,252 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-07-23 15:30:22,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-07-23 15:30:22,253 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:22,253 INFO L353 BasicCegarLoop]: trace histogram [96, 1, 1] [2018-07-23 15:30:22,253 INFO L414 AbstractCegarLoop]: === Iteration 97 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:22,253 INFO L82 PathProgramCache]: Analyzing trace with hash -278814253, now seen corresponding path program 96 times [2018-07-23 15:30:22,253 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:22,554 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 15:30:22,554 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:22,554 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-07-23 15:30:22,555 INFO L450 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-07-23 15:30:22,555 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-07-23 15:30:22,556 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:30:22,556 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-07-23 15:30:22,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:22,650 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-07-23 15:30:22,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-07-23 15:30:22,650 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-07-23 15:30:22,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:22,651 INFO L225 Difference]: With dead ends: 101 [2018-07-23 15:30:22,651 INFO L226 Difference]: Without dead ends: 100 [2018-07-23 15:30:22,651 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:30:22,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-07-23 15:30:22,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-07-23 15:30:22,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-07-23 15:30:22,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-07-23 15:30:22,654 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-07-23 15:30:22,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:22,654 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-07-23 15:30:22,654 INFO L472 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-07-23 15:30:22,654 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-07-23 15:30:22,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-07-23 15:30:22,654 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:22,654 INFO L353 BasicCegarLoop]: trace histogram [97, 1, 1] [2018-07-23 15:30:22,655 INFO L414 AbstractCegarLoop]: === Iteration 98 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:22,655 INFO L82 PathProgramCache]: Analyzing trace with hash -53307016, now seen corresponding path program 97 times [2018-07-23 15:30:22,655 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:22,942 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 15:30:22,942 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:22,942 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2018-07-23 15:30:22,943 INFO L450 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-07-23 15:30:22,943 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-07-23 15:30:22,944 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:30:22,944 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-07-23 15:30:23,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:23,032 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-07-23 15:30:23,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-23 15:30:23,032 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-07-23 15:30:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:23,033 INFO L225 Difference]: With dead ends: 102 [2018-07-23 15:30:23,033 INFO L226 Difference]: Without dead ends: 101 [2018-07-23 15:30:23,033 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:30:23,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-07-23 15:30:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-07-23 15:30:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-07-23 15:30:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-07-23 15:30:23,036 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-07-23 15:30:23,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:23,037 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-07-23 15:30:23,037 INFO L472 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-07-23 15:30:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-07-23 15:30:23,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-07-23 15:30:23,037 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:23,038 INFO L353 BasicCegarLoop]: trace histogram [98, 1, 1] [2018-07-23 15:30:23,038 INFO L414 AbstractCegarLoop]: === Iteration 99 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:23,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1652517261, now seen corresponding path program 98 times [2018-07-23 15:30:23,038 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:23,330 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 15:30:23,330 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:23,330 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-07-23 15:30:23,331 INFO L450 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-07-23 15:30:23,331 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-07-23 15:30:23,332 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:30:23,332 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-07-23 15:30:23,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:23,411 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-07-23 15:30:23,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-07-23 15:30:23,411 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-07-23 15:30:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:23,411 INFO L225 Difference]: With dead ends: 103 [2018-07-23 15:30:23,411 INFO L226 Difference]: Without dead ends: 102 [2018-07-23 15:30:23,412 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:30:23,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-07-23 15:30:23,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-07-23 15:30:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-07-23 15:30:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-07-23 15:30:23,415 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-07-23 15:30:23,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:23,415 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-07-23 15:30:23,415 INFO L472 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-07-23 15:30:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-07-23 15:30:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-07-23 15:30:23,415 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:23,416 INFO L353 BasicCegarLoop]: trace histogram [99, 1, 1] [2018-07-23 15:30:23,416 INFO L414 AbstractCegarLoop]: === Iteration 100 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:23,416 INFO L82 PathProgramCache]: Analyzing trace with hash 311572696, now seen corresponding path program 99 times [2018-07-23 15:30:23,416 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:23,724 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 15:30:23,724 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:23,724 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2018-07-23 15:30:23,725 INFO L450 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-07-23 15:30:23,726 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-07-23 15:30:23,726 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:30:23,726 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-07-23 15:30:23,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:23,805 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-07-23 15:30:23,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-23 15:30:23,805 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-07-23 15:30:23,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:23,806 INFO L225 Difference]: With dead ends: 104 [2018-07-23 15:30:23,806 INFO L226 Difference]: Without dead ends: 103 [2018-07-23 15:30:23,807 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:30:23,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-07-23 15:30:23,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-07-23 15:30:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-07-23 15:30:23,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-07-23 15:30:23,810 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-07-23 15:30:23,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:23,810 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-07-23 15:30:23,810 INFO L472 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-07-23 15:30:23,810 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-07-23 15:30:23,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-07-23 15:30:23,810 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:23,810 INFO L353 BasicCegarLoop]: trace histogram [100, 1, 1] [2018-07-23 15:30:23,811 INFO L414 AbstractCegarLoop]: === Iteration 101 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:23,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1068819219, now seen corresponding path program 100 times [2018-07-23 15:30:23,811 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:25,169 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 15:30:25,169 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:25,169 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2018-07-23 15:30:25,170 INFO L450 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-07-23 15:30:25,170 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-07-23 15:30:25,171 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:30:25,171 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-07-23 15:30:26,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:26,548 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-07-23 15:30:26,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-07-23 15:30:26,548 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-07-23 15:30:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:26,549 INFO L225 Difference]: With dead ends: 105 [2018-07-23 15:30:26,549 INFO L226 Difference]: Without dead ends: 104 [2018-07-23 15:30:26,550 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:30:26,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-07-23 15:30:26,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-07-23 15:30:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-07-23 15:30:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-07-23 15:30:26,557 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-07-23 15:30:26,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:26,557 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-07-23 15:30:26,557 INFO L472 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-07-23 15:30:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-07-23 15:30:26,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-07-23 15:30:26,558 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:26,558 INFO L353 BasicCegarLoop]: trace histogram [101, 1, 1] [2018-07-23 15:30:26,558 INFO L414 AbstractCegarLoop]: === Iteration 102 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:26,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1226342344, now seen corresponding path program 101 times [2018-07-23 15:30:26,558 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:27,437 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 15:30:27,437 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:27,437 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2018-07-23 15:30:27,438 INFO L450 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-07-23 15:30:27,438 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-07-23 15:30:27,439 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=10507, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:30:27,440 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-07-23 15:30:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:28,648 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-07-23 15:30:28,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-07-23 15:30:28,648 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-07-23 15:30:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:28,649 INFO L225 Difference]: With dead ends: 106 [2018-07-23 15:30:28,649 INFO L226 Difference]: Without dead ends: 105 [2018-07-23 15:30:28,651 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=10507, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:30:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-07-23 15:30:28,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-07-23 15:30:28,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-07-23 15:30:28,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-07-23 15:30:28,658 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-07-23 15:30:28,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:28,658 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-07-23 15:30:28,659 INFO L472 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-07-23 15:30:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-07-23 15:30:28,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-07-23 15:30:28,659 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:28,659 INFO L353 BasicCegarLoop]: trace histogram [102, 1, 1] [2018-07-23 15:30:28,660 INFO L414 AbstractCegarLoop]: === Iteration 103 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:28,660 INFO L82 PathProgramCache]: Analyzing trace with hash 638093235, now seen corresponding path program 102 times [2018-07-23 15:30:28,660 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:29,673 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 15:30:29,673 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:29,674 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2018-07-23 15:30:29,674 INFO L450 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-07-23 15:30:29,674 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-07-23 15:30:29,675 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=10713, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:30:29,675 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 105 states. [2018-07-23 15:30:30,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:30,798 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-07-23 15:30:30,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-07-23 15:30:30,798 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 104 [2018-07-23 15:30:30,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:30,799 INFO L225 Difference]: With dead ends: 107 [2018-07-23 15:30:30,800 INFO L226 Difference]: Without dead ends: 106 [2018-07-23 15:30:30,800 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=10713, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:30:30,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-07-23 15:30:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-07-23 15:30:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-07-23 15:30:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-07-23 15:30:30,808 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-07-23 15:30:30,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:30,808 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-07-23 15:30:30,808 INFO L472 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-07-23 15:30:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-07-23 15:30:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-07-23 15:30:30,809 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:30,809 INFO L353 BasicCegarLoop]: trace histogram [103, 1, 1] [2018-07-23 15:30:30,809 INFO L414 AbstractCegarLoop]: === Iteration 104 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:30,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1693945960, now seen corresponding path program 103 times [2018-07-23 15:30:30,809 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:31,712 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 15:30:31,713 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:31,713 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2018-07-23 15:30:31,713 INFO L450 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-07-23 15:30:31,714 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-07-23 15:30:31,714 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=10921, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:30:31,715 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-07-23 15:30:32,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:32,721 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-07-23 15:30:32,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-07-23 15:30:32,721 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-07-23 15:30:32,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:32,722 INFO L225 Difference]: With dead ends: 108 [2018-07-23 15:30:32,722 INFO L226 Difference]: Without dead ends: 107 [2018-07-23 15:30:32,723 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=10921, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:30:32,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-07-23 15:30:32,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-07-23 15:30:32,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 15:30:32,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-07-23 15:30:32,731 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-07-23 15:30:32,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:32,731 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-07-23 15:30:32,732 INFO L472 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-07-23 15:30:32,732 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-07-23 15:30:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-07-23 15:30:32,732 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:32,733 INFO L353 BasicCegarLoop]: trace histogram [104, 1, 1] [2018-07-23 15:30:32,733 INFO L414 AbstractCegarLoop]: === Iteration 105 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash -972716973, now seen corresponding path program 104 times [2018-07-23 15:30:32,733 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:33,609 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 15:30:33,609 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:33,610 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2018-07-23 15:30:33,610 INFO L450 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-07-23 15:30:33,610 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-07-23 15:30:33,611 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=11131, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:30:33,611 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 107 states. [2018-07-23 15:30:34,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:34,713 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-07-23 15:30:34,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-07-23 15:30:34,713 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 106 [2018-07-23 15:30:34,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:34,714 INFO L225 Difference]: With dead ends: 109 [2018-07-23 15:30:34,714 INFO L226 Difference]: Without dead ends: 108 [2018-07-23 15:30:34,715 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=11131, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:30:34,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-07-23 15:30:34,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-07-23 15:30:34,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-07-23 15:30:34,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-07-23 15:30:34,723 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-07-23 15:30:34,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:34,723 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-07-23 15:30:34,724 INFO L472 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-07-23 15:30:34,724 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-07-23 15:30:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-07-23 15:30:34,724 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:34,724 INFO L353 BasicCegarLoop]: trace histogram [105, 1, 1] [2018-07-23 15:30:34,725 INFO L414 AbstractCegarLoop]: === Iteration 106 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:34,725 INFO L82 PathProgramCache]: Analyzing trace with hash -89454856, now seen corresponding path program 105 times [2018-07-23 15:30:34,725 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:35,768 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 15:30:35,769 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:35,769 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2018-07-23 15:30:35,769 INFO L450 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-07-23 15:30:35,769 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-07-23 15:30:35,770 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=11343, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:30:35,770 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-07-23 15:30:36,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:36,523 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-07-23 15:30:36,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-07-23 15:30:36,523 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-07-23 15:30:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:36,523 INFO L225 Difference]: With dead ends: 110 [2018-07-23 15:30:36,524 INFO L226 Difference]: Without dead ends: 109 [2018-07-23 15:30:36,524 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=11343, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:30:36,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-07-23 15:30:36,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-07-23 15:30:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-07-23 15:30:36,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-07-23 15:30:36,531 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-07-23 15:30:36,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:36,531 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-07-23 15:30:36,532 INFO L472 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-07-23 15:30:36,532 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-07-23 15:30:36,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-07-23 15:30:36,532 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:36,532 INFO L353 BasicCegarLoop]: trace histogram [106, 1, 1] [2018-07-23 15:30:36,533 INFO L414 AbstractCegarLoop]: === Iteration 107 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:36,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1521866995, now seen corresponding path program 106 times [2018-07-23 15:30:36,533 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:37,245 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 15:30:37,246 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:37,246 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2018-07-23 15:30:37,246 INFO L450 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-07-23 15:30:37,246 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-07-23 15:30:37,247 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=11557, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:30:37,247 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 109 states. [2018-07-23 15:30:38,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:38,038 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-07-23 15:30:38,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-07-23 15:30:38,038 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 108 [2018-07-23 15:30:38,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:38,039 INFO L225 Difference]: With dead ends: 111 [2018-07-23 15:30:38,039 INFO L226 Difference]: Without dead ends: 110 [2018-07-23 15:30:38,040 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=11557, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:30:38,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-07-23 15:30:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-07-23 15:30:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-07-23 15:30:38,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-07-23 15:30:38,047 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-07-23 15:30:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:38,047 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-07-23 15:30:38,047 INFO L472 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-07-23 15:30:38,047 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-07-23 15:30:38,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-07-23 15:30:38,048 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:38,048 INFO L353 BasicCegarLoop]: trace histogram [107, 1, 1] [2018-07-23 15:30:38,048 INFO L414 AbstractCegarLoop]: === Iteration 108 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:38,048 INFO L82 PathProgramCache]: Analyzing trace with hash -66763176, now seen corresponding path program 107 times [2018-07-23 15:30:38,049 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:38,834 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 15:30:38,835 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:38,835 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2018-07-23 15:30:38,835 INFO L450 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-07-23 15:30:38,835 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-07-23 15:30:38,836 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=11773, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:30:38,836 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-07-23 15:30:39,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:39,695 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-07-23 15:30:39,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-23 15:30:39,695 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-07-23 15:30:39,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:39,696 INFO L225 Difference]: With dead ends: 112 [2018-07-23 15:30:39,696 INFO L226 Difference]: Without dead ends: 111 [2018-07-23 15:30:39,697 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=11773, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:30:39,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-07-23 15:30:39,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-07-23 15:30:39,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-07-23 15:30:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-07-23 15:30:39,704 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-07-23 15:30:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:39,704 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-07-23 15:30:39,704 INFO L472 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-07-23 15:30:39,704 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-07-23 15:30:39,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-07-23 15:30:39,705 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:39,705 INFO L353 BasicCegarLoop]: trace histogram [108, 1, 1] [2018-07-23 15:30:39,705 INFO L414 AbstractCegarLoop]: === Iteration 109 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:39,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2069658221, now seen corresponding path program 108 times [2018-07-23 15:30:39,706 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:40,316 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 15:30:40,317 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:40,317 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2018-07-23 15:30:40,317 INFO L450 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-07-23 15:30:40,317 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-07-23 15:30:40,318 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=11991, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:30:40,319 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 111 states. [2018-07-23 15:30:41,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:41,134 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-07-23 15:30:41,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-07-23 15:30:41,134 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 110 [2018-07-23 15:30:41,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:41,135 INFO L225 Difference]: With dead ends: 113 [2018-07-23 15:30:41,135 INFO L226 Difference]: Without dead ends: 112 [2018-07-23 15:30:41,136 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=11991, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:30:41,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-07-23 15:30:41,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-07-23 15:30:41,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-07-23 15:30:41,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-07-23 15:30:41,144 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-07-23 15:30:41,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:41,144 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-07-23 15:30:41,144 INFO L472 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-07-23 15:30:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-07-23 15:30:41,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-07-23 15:30:41,145 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:41,145 INFO L353 BasicCegarLoop]: trace histogram [109, 1, 1] [2018-07-23 15:30:41,145 INFO L414 AbstractCegarLoop]: === Iteration 110 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:41,146 INFO L82 PathProgramCache]: Analyzing trace with hash 265104824, now seen corresponding path program 109 times [2018-07-23 15:30:41,146 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:41,874 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 15:30:41,874 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:41,874 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2018-07-23 15:30:41,874 INFO L450 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-07-23 15:30:41,875 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-07-23 15:30:41,875 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=12211, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:30:41,875 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-07-23 15:30:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:42,710 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-07-23 15:30:42,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-07-23 15:30:42,710 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-07-23 15:30:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:42,711 INFO L225 Difference]: With dead ends: 114 [2018-07-23 15:30:42,711 INFO L226 Difference]: Without dead ends: 113 [2018-07-23 15:30:42,712 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=12211, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:30:42,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-07-23 15:30:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-07-23 15:30:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-07-23 15:30:42,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-07-23 15:30:42,719 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-07-23 15:30:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:42,719 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-07-23 15:30:42,719 INFO L472 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-07-23 15:30:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-07-23 15:30:42,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-07-23 15:30:42,720 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:42,720 INFO L353 BasicCegarLoop]: trace histogram [110, 1, 1] [2018-07-23 15:30:42,720 INFO L414 AbstractCegarLoop]: === Iteration 111 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:42,721 INFO L82 PathProgramCache]: Analyzing trace with hash -371684813, now seen corresponding path program 110 times [2018-07-23 15:30:42,721 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:43,538 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 15:30:43,539 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:43,539 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2018-07-23 15:30:43,539 INFO L450 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-07-23 15:30:43,539 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-07-23 15:30:43,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=12433, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:30:43,540 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 113 states. [2018-07-23 15:30:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:44,366 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-07-23 15:30:44,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-07-23 15:30:44,367 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 112 [2018-07-23 15:30:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:44,367 INFO L225 Difference]: With dead ends: 115 [2018-07-23 15:30:44,368 INFO L226 Difference]: Without dead ends: 114 [2018-07-23 15:30:44,368 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=12433, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:30:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-07-23 15:30:44,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-07-23 15:30:44,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-07-23 15:30:44,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-07-23 15:30:44,375 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-07-23 15:30:44,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:44,376 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-07-23 15:30:44,376 INFO L472 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-07-23 15:30:44,376 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-07-23 15:30:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-07-23 15:30:44,377 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:44,377 INFO L353 BasicCegarLoop]: trace histogram [111, 1, 1] [2018-07-23 15:30:44,377 INFO L414 AbstractCegarLoop]: === Iteration 112 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:44,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1362672920, now seen corresponding path program 111 times [2018-07-23 15:30:44,377 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:45,090 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 15:30:45,090 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:45,090 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2018-07-23 15:30:45,090 INFO L450 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-07-23 15:30:45,091 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-07-23 15:30:45,091 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=12657, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:30:45,092 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-07-23 15:30:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:45,955 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-07-23 15:30:45,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-07-23 15:30:45,955 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-07-23 15:30:45,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:45,956 INFO L225 Difference]: With dead ends: 116 [2018-07-23 15:30:45,956 INFO L226 Difference]: Without dead ends: 115 [2018-07-23 15:30:45,957 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=12657, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:30:45,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-07-23 15:30:45,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-07-23 15:30:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-07-23 15:30:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-07-23 15:30:45,964 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-07-23 15:30:45,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:45,965 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-07-23 15:30:45,965 INFO L472 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-07-23 15:30:45,965 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-07-23 15:30:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-07-23 15:30:45,966 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:45,966 INFO L353 BasicCegarLoop]: trace histogram [112, 1, 1] [2018-07-23 15:30:45,966 INFO L414 AbstractCegarLoop]: === Iteration 113 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:45,966 INFO L82 PathProgramCache]: Analyzing trace with hash -706812205, now seen corresponding path program 112 times [2018-07-23 15:30:45,966 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:46,639 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 15:30:46,639 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:46,639 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2018-07-23 15:30:46,640 INFO L450 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-07-23 15:30:46,640 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-07-23 15:30:46,640 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=12883, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:30:46,641 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 115 states. [2018-07-23 15:30:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:47,560 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-07-23 15:30:47,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-07-23 15:30:47,560 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 114 [2018-07-23 15:30:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:47,561 INFO L225 Difference]: With dead ends: 117 [2018-07-23 15:30:47,561 INFO L226 Difference]: Without dead ends: 116 [2018-07-23 15:30:47,561 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=12883, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:30:47,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-07-23 15:30:47,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-07-23 15:30:47,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 15:30:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-07-23 15:30:47,568 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-07-23 15:30:47,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:47,568 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-07-23 15:30:47,569 INFO L472 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-07-23 15:30:47,569 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-07-23 15:30:47,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-07-23 15:30:47,569 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:47,569 INFO L353 BasicCegarLoop]: trace histogram [113, 1, 1] [2018-07-23 15:30:47,569 INFO L414 AbstractCegarLoop]: === Iteration 114 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:47,569 INFO L82 PathProgramCache]: Analyzing trace with hash -436341640, now seen corresponding path program 113 times [2018-07-23 15:30:47,570 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:48,154 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 15:30:48,154 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:48,155 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2018-07-23 15:30:48,155 INFO L450 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-07-23 15:30:48,155 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-07-23 15:30:48,156 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=13111, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:30:48,156 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-07-23 15:30:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:49,001 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-07-23 15:30:49,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-07-23 15:30:49,002 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-07-23 15:30:49,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:49,002 INFO L225 Difference]: With dead ends: 118 [2018-07-23 15:30:49,002 INFO L226 Difference]: Without dead ends: 117 [2018-07-23 15:30:49,003 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=13111, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:30:49,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-07-23 15:30:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-07-23 15:30:49,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-07-23 15:30:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-07-23 15:30:49,011 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-07-23 15:30:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:49,011 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-07-23 15:30:49,011 INFO L472 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-07-23 15:30:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-07-23 15:30:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-07-23 15:30:49,012 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:49,012 INFO L353 BasicCegarLoop]: trace histogram [114, 1, 1] [2018-07-23 15:30:49,012 INFO L414 AbstractCegarLoop]: === Iteration 115 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:49,012 INFO L82 PathProgramCache]: Analyzing trace with hash -641688717, now seen corresponding path program 114 times [2018-07-23 15:30:49,012 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:49,763 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 15:30:49,763 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:49,764 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115] total 115 [2018-07-23 15:30:49,764 INFO L450 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-07-23 15:30:49,764 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-07-23 15:30:49,765 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=13341, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:30:49,765 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 117 states. [2018-07-23 15:30:50,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:50,684 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-07-23 15:30:50,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-07-23 15:30:50,685 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 116 [2018-07-23 15:30:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:50,685 INFO L225 Difference]: With dead ends: 119 [2018-07-23 15:30:50,686 INFO L226 Difference]: Without dead ends: 118 [2018-07-23 15:30:50,687 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=13341, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:30:50,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-07-23 15:30:50,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-07-23 15:30:50,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-07-23 15:30:50,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-07-23 15:30:50,695 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-07-23 15:30:50,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:50,695 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-07-23 15:30:50,695 INFO L472 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-07-23 15:30:50,695 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-07-23 15:30:50,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-07-23 15:30:50,696 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:50,696 INFO L353 BasicCegarLoop]: trace histogram [115, 1, 1] [2018-07-23 15:30:50,696 INFO L414 AbstractCegarLoop]: === Iteration 116 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:50,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1582486488, now seen corresponding path program 115 times [2018-07-23 15:30:50,697 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:50,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:51,599 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 15:30:51,599 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:51,599 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2018-07-23 15:30:51,600 INFO L450 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-07-23 15:30:51,600 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-07-23 15:30:51,600 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=13573, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:30:51,600 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-07-23 15:30:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:52,504 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-07-23 15:30:52,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-07-23 15:30:52,505 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-07-23 15:30:52,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:52,505 INFO L225 Difference]: With dead ends: 120 [2018-07-23 15:30:52,505 INFO L226 Difference]: Without dead ends: 119 [2018-07-23 15:30:52,506 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=13573, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:30:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-07-23 15:30:52,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-07-23 15:30:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-07-23 15:30:52,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-07-23 15:30:52,512 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-07-23 15:30:52,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:52,512 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-07-23 15:30:52,512 INFO L472 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-07-23 15:30:52,512 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-07-23 15:30:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-07-23 15:30:52,513 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:52,513 INFO L353 BasicCegarLoop]: trace histogram [116, 1, 1] [2018-07-23 15:30:52,513 INFO L414 AbstractCegarLoop]: === Iteration 117 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:52,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1812441107, now seen corresponding path program 116 times [2018-07-23 15:30:52,514 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:53,195 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 15:30:53,196 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:53,196 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117] total 117 [2018-07-23 15:30:53,196 INFO L450 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-07-23 15:30:53,196 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-07-23 15:30:53,197 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=13807, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:30:53,197 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 119 states. [2018-07-23 15:30:54,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:54,153 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-07-23 15:30:54,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-07-23 15:30:54,153 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 118 [2018-07-23 15:30:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:54,154 INFO L225 Difference]: With dead ends: 121 [2018-07-23 15:30:54,154 INFO L226 Difference]: Without dead ends: 120 [2018-07-23 15:30:54,155 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=13807, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:30:54,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-07-23 15:30:54,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-07-23 15:30:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-07-23 15:30:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-07-23 15:30:54,162 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-07-23 15:30:54,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:54,163 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-07-23 15:30:54,163 INFO L472 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-07-23 15:30:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-07-23 15:30:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-07-23 15:30:54,164 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:54,164 INFO L353 BasicCegarLoop]: trace histogram [117, 1, 1] [2018-07-23 15:30:54,164 INFO L414 AbstractCegarLoop]: === Iteration 118 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:54,164 INFO L82 PathProgramCache]: Analyzing trace with hash 351099704, now seen corresponding path program 117 times [2018-07-23 15:30:54,164 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:54,877 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 15:30:54,877 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:54,878 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2018-07-23 15:30:54,878 INFO L450 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-07-23 15:30:54,878 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-07-23 15:30:54,879 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=14043, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:30:54,879 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-07-23 15:30:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:55,850 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-07-23 15:30:55,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-07-23 15:30:55,850 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-07-23 15:30:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:55,851 INFO L225 Difference]: With dead ends: 122 [2018-07-23 15:30:55,851 INFO L226 Difference]: Without dead ends: 121 [2018-07-23 15:30:55,852 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=237, Invalid=14043, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:30:55,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-07-23 15:30:55,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-07-23 15:30:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-07-23 15:30:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-07-23 15:30:55,891 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-07-23 15:30:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:55,891 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-07-23 15:30:55,891 INFO L472 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-07-23 15:30:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-07-23 15:30:55,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-07-23 15:30:55,893 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:55,893 INFO L353 BasicCegarLoop]: trace histogram [118, 1, 1] [2018-07-23 15:30:55,893 INFO L414 AbstractCegarLoop]: === Iteration 119 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:55,894 INFO L82 PathProgramCache]: Analyzing trace with hash -2000810829, now seen corresponding path program 118 times [2018-07-23 15:30:55,894 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:56,587 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 15:30:56,587 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:56,588 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119] total 119 [2018-07-23 15:30:56,588 INFO L450 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-07-23 15:30:56,588 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-07-23 15:30:56,589 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=14281, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:30:56,589 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 121 states. [2018-07-23 15:30:57,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:57,569 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-07-23 15:30:57,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-07-23 15:30:57,569 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 120 [2018-07-23 15:30:57,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:57,570 INFO L225 Difference]: With dead ends: 123 [2018-07-23 15:30:57,570 INFO L226 Difference]: Without dead ends: 122 [2018-07-23 15:30:57,571 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=14281, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:30:57,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-07-23 15:30:57,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-07-23 15:30:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-07-23 15:30:57,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-07-23 15:30:57,578 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-07-23 15:30:57,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:57,578 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-07-23 15:30:57,578 INFO L472 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-07-23 15:30:57,578 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-07-23 15:30:57,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-07-23 15:30:57,579 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:57,579 INFO L353 BasicCegarLoop]: trace histogram [119, 1, 1] [2018-07-23 15:30:57,579 INFO L414 AbstractCegarLoop]: === Iteration 120 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:57,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1895593320, now seen corresponding path program 119 times [2018-07-23 15:30:57,580 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:58,343 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 15:30:58,343 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:58,344 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2018-07-23 15:30:58,344 INFO L450 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-07-23 15:30:58,344 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-07-23 15:30:58,345 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=14521, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:30:58,345 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-07-23 15:30:59,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:59,338 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-07-23 15:30:59,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-07-23 15:30:59,339 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-07-23 15:30:59,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:59,339 INFO L225 Difference]: With dead ends: 124 [2018-07-23 15:30:59,339 INFO L226 Difference]: Without dead ends: 123 [2018-07-23 15:30:59,340 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=14521, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:30:59,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-07-23 15:30:59,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-07-23 15:30:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-07-23 15:30:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-07-23 15:30:59,345 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-07-23 15:30:59,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:59,346 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-07-23 15:30:59,346 INFO L472 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-07-23 15:30:59,346 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-07-23 15:30:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-07-23 15:30:59,346 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:59,347 INFO L353 BasicCegarLoop]: trace histogram [120, 1, 1] [2018-07-23 15:30:59,347 INFO L414 AbstractCegarLoop]: === Iteration 121 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:59,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1366149459, now seen corresponding path program 120 times [2018-07-23 15:30:59,347 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:00,588 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 15:31:00,588 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:00,589 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121] total 121 [2018-07-23 15:31:00,589 INFO L450 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-07-23 15:31:00,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-07-23 15:31:00,590 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=14763, Unknown=0, NotChecked=0, Total=15006 [2018-07-23 15:31:00,590 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 123 states. [2018-07-23 15:31:01,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:01,704 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-07-23 15:31:01,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-07-23 15:31:01,705 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 122 [2018-07-23 15:31:01,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:01,705 INFO L225 Difference]: With dead ends: 125 [2018-07-23 15:31:01,705 INFO L226 Difference]: Without dead ends: 124 [2018-07-23 15:31:01,706 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=14763, Unknown=0, NotChecked=0, Total=15006 [2018-07-23 15:31:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-07-23 15:31:01,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-07-23 15:31:01,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-07-23 15:31:01,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-07-23 15:31:01,714 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-07-23 15:31:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:01,714 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-07-23 15:31:01,714 INFO L472 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-07-23 15:31:01,715 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-07-23 15:31:01,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-07-23 15:31:01,715 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:01,715 INFO L353 BasicCegarLoop]: trace histogram [121, 1, 1] [2018-07-23 15:31:01,715 INFO L414 AbstractCegarLoop]: === Iteration 122 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:01,716 INFO L82 PathProgramCache]: Analyzing trace with hash -599039496, now seen corresponding path program 121 times [2018-07-23 15:31:01,716 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:02,498 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 15:31:02,498 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:02,498 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2018-07-23 15:31:02,499 INFO L450 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-07-23 15:31:02,499 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-07-23 15:31:02,500 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=15007, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:31:02,500 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-07-23 15:31:03,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:03,526 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-07-23 15:31:03,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-07-23 15:31:03,526 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-07-23 15:31:03,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:03,526 INFO L225 Difference]: With dead ends: 126 [2018-07-23 15:31:03,526 INFO L226 Difference]: Without dead ends: 125 [2018-07-23 15:31:03,527 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=15007, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:31:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-07-23 15:31:03,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-07-23 15:31:03,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 15:31:03,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-07-23 15:31:03,534 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-07-23 15:31:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:03,535 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-07-23 15:31:03,535 INFO L472 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-07-23 15:31:03,535 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-07-23 15:31:03,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-07-23 15:31:03,536 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:03,536 INFO L353 BasicCegarLoop]: trace histogram [122, 1, 1] [2018-07-23 15:31:03,536 INFO L414 AbstractCegarLoop]: === Iteration 123 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:03,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1390354957, now seen corresponding path program 122 times [2018-07-23 15:31:03,536 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:04,313 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 15:31:04,314 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:04,314 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123] total 123 [2018-07-23 15:31:04,314 INFO L450 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-07-23 15:31:04,315 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-07-23 15:31:04,316 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=15253, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:31:04,316 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 125 states. [2018-07-23 15:31:05,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:05,381 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-07-23 15:31:05,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-07-23 15:31:05,382 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 124 [2018-07-23 15:31:05,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:05,382 INFO L225 Difference]: With dead ends: 127 [2018-07-23 15:31:05,382 INFO L226 Difference]: Without dead ends: 126 [2018-07-23 15:31:05,383 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=15253, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:31:05,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-07-23 15:31:05,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-07-23 15:31:05,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-07-23 15:31:05,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-07-23 15:31:05,390 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-07-23 15:31:05,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:05,390 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-07-23 15:31:05,390 INFO L472 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-07-23 15:31:05,390 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-07-23 15:31:05,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-07-23 15:31:05,391 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:05,391 INFO L353 BasicCegarLoop]: trace histogram [123, 1, 1] [2018-07-23 15:31:05,391 INFO L414 AbstractCegarLoop]: === Iteration 124 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:05,391 INFO L82 PathProgramCache]: Analyzing trace with hash -151330472, now seen corresponding path program 123 times [2018-07-23 15:31:05,392 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:06,377 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 15:31:06,378 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:06,378 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2018-07-23 15:31:06,378 INFO L450 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-07-23 15:31:06,378 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-07-23 15:31:06,379 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=15501, Unknown=0, NotChecked=0, Total=15750 [2018-07-23 15:31:06,379 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-07-23 15:31:07,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:07,431 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-07-23 15:31:07,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-07-23 15:31:07,431 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-07-23 15:31:07,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:07,431 INFO L225 Difference]: With dead ends: 128 [2018-07-23 15:31:07,431 INFO L226 Difference]: Without dead ends: 127 [2018-07-23 15:31:07,433 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=15501, Unknown=0, NotChecked=0, Total=15750 [2018-07-23 15:31:07,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-07-23 15:31:07,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-07-23 15:31:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-07-23 15:31:07,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-07-23 15:31:07,438 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-07-23 15:31:07,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:07,438 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-07-23 15:31:07,438 INFO L472 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-07-23 15:31:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-07-23 15:31:07,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-07-23 15:31:07,439 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:07,439 INFO L353 BasicCegarLoop]: trace histogram [124, 1, 1] [2018-07-23 15:31:07,439 INFO L414 AbstractCegarLoop]: === Iteration 125 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:07,439 INFO L82 PathProgramCache]: Analyzing trace with hash -396277101, now seen corresponding path program 124 times [2018-07-23 15:31:07,439 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:08,233 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 15:31:08,233 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:08,233 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125] total 125 [2018-07-23 15:31:08,233 INFO L450 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-07-23 15:31:08,234 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-07-23 15:31:08,234 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=15751, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:31:08,234 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 127 states. [2018-07-23 15:31:09,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:09,382 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-07-23 15:31:09,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-07-23 15:31:09,382 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 126 [2018-07-23 15:31:09,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:09,382 INFO L225 Difference]: With dead ends: 129 [2018-07-23 15:31:09,383 INFO L226 Difference]: Without dead ends: 128 [2018-07-23 15:31:09,383 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=251, Invalid=15751, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:31:09,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-07-23 15:31:09,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-07-23 15:31:09,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-07-23 15:31:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-07-23 15:31:09,390 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-07-23 15:31:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:09,390 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-07-23 15:31:09,391 INFO L472 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-07-23 15:31:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-07-23 15:31:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-07-23 15:31:09,391 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:09,391 INFO L353 BasicCegarLoop]: trace histogram [125, 1, 1] [2018-07-23 15:31:09,392 INFO L414 AbstractCegarLoop]: === Iteration 126 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:09,392 INFO L82 PathProgramCache]: Analyzing trace with hash 600311992, now seen corresponding path program 125 times [2018-07-23 15:31:09,392 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:10,088 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 15:31:10,089 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:10,089 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126] total 126 [2018-07-23 15:31:10,089 INFO L450 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-07-23 15:31:10,089 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-07-23 15:31:10,090 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=16003, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:31:10,090 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-07-23 15:31:11,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:11,179 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-07-23 15:31:11,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-07-23 15:31:11,179 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-07-23 15:31:11,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:11,180 INFO L225 Difference]: With dead ends: 130 [2018-07-23 15:31:11,180 INFO L226 Difference]: Without dead ends: 129 [2018-07-23 15:31:11,181 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=16003, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:31:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-07-23 15:31:11,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-07-23 15:31:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-07-23 15:31:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-07-23 15:31:11,188 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-07-23 15:31:11,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:11,188 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-07-23 15:31:11,188 INFO L472 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-07-23 15:31:11,188 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-07-23 15:31:11,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-07-23 15:31:11,188 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:11,188 INFO L353 BasicCegarLoop]: trace histogram [126, 1, 1] [2018-07-23 15:31:11,189 INFO L414 AbstractCegarLoop]: === Iteration 127 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:11,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1429802803, now seen corresponding path program 126 times [2018-07-23 15:31:11,189 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:12,046 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 15:31:12,047 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:12,047 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127] total 127 [2018-07-23 15:31:12,047 INFO L450 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-07-23 15:31:12,047 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-07-23 15:31:12,048 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=16257, Unknown=0, NotChecked=0, Total=16512 [2018-07-23 15:31:12,049 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 129 states. [2018-07-23 15:31:13,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:13,186 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-07-23 15:31:13,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-07-23 15:31:13,186 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 128 [2018-07-23 15:31:13,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:13,187 INFO L225 Difference]: With dead ends: 131 [2018-07-23 15:31:13,187 INFO L226 Difference]: Without dead ends: 130 [2018-07-23 15:31:13,188 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=16257, Unknown=0, NotChecked=0, Total=16512 [2018-07-23 15:31:13,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-07-23 15:31:13,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-07-23 15:31:13,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-07-23 15:31:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-07-23 15:31:13,195 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-07-23 15:31:13,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:13,196 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-07-23 15:31:13,196 INFO L472 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-07-23 15:31:13,196 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-07-23 15:31:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-07-23 15:31:13,197 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:13,197 INFO L353 BasicCegarLoop]: trace histogram [127, 1, 1] [2018-07-23 15:31:13,197 INFO L414 AbstractCegarLoop]: === Iteration 128 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:13,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1374214168, now seen corresponding path program 127 times [2018-07-23 15:31:13,197 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:14,350 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 15:31:14,350 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:14,350 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128] total 128 [2018-07-23 15:31:14,351 INFO L450 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-07-23 15:31:14,351 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-07-23 15:31:14,352 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=16513, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:31:14,358 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-07-23 15:31:15,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:15,687 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-07-23 15:31:15,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-07-23 15:31:15,687 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-07-23 15:31:15,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:15,688 INFO L225 Difference]: With dead ends: 132 [2018-07-23 15:31:15,688 INFO L226 Difference]: Without dead ends: 131 [2018-07-23 15:31:15,689 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=257, Invalid=16513, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:31:15,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-07-23 15:31:15,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-07-23 15:31:15,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-07-23 15:31:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-07-23 15:31:15,696 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-07-23 15:31:15,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:15,696 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-07-23 15:31:15,696 INFO L472 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-07-23 15:31:15,696 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-07-23 15:31:15,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-07-23 15:31:15,697 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:15,697 INFO L353 BasicCegarLoop]: trace histogram [128, 1, 1] [2018-07-23 15:31:15,697 INFO L414 AbstractCegarLoop]: === Iteration 129 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:15,697 INFO L82 PathProgramCache]: Analyzing trace with hash -349033517, now seen corresponding path program 128 times [2018-07-23 15:31:15,697 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:16,546 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 15:31:16,547 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:16,547 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129] total 129 [2018-07-23 15:31:16,547 INFO L450 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-07-23 15:31:16,548 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-07-23 15:31:16,549 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=16771, Unknown=0, NotChecked=0, Total=17030 [2018-07-23 15:31:16,549 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 131 states. [2018-07-23 15:31:17,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:17,697 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-07-23 15:31:17,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-07-23 15:31:17,697 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 130 [2018-07-23 15:31:17,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:17,697 INFO L225 Difference]: With dead ends: 133 [2018-07-23 15:31:17,697 INFO L226 Difference]: Without dead ends: 132 [2018-07-23 15:31:17,699 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=16771, Unknown=0, NotChecked=0, Total=17030 [2018-07-23 15:31:17,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-07-23 15:31:17,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-07-23 15:31:17,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-07-23 15:31:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-07-23 15:31:17,704 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-07-23 15:31:17,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:17,705 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-07-23 15:31:17,705 INFO L472 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-07-23 15:31:17,705 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-07-23 15:31:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-07-23 15:31:17,705 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:17,705 INFO L353 BasicCegarLoop]: trace histogram [129, 1, 1] [2018-07-23 15:31:17,705 INFO L414 AbstractCegarLoop]: === Iteration 130 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:17,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2064863096, now seen corresponding path program 129 times [2018-07-23 15:31:17,706 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:18,597 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 15:31:18,597 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:18,597 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130] total 130 [2018-07-23 15:31:18,598 INFO L450 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-07-23 15:31:18,598 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-07-23 15:31:18,599 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=17031, Unknown=0, NotChecked=0, Total=17292 [2018-07-23 15:31:18,599 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-07-23 15:31:19,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:19,762 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-07-23 15:31:19,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-07-23 15:31:19,762 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-07-23 15:31:19,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:19,763 INFO L225 Difference]: With dead ends: 134 [2018-07-23 15:31:19,763 INFO L226 Difference]: Without dead ends: 133 [2018-07-23 15:31:19,764 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=17031, Unknown=0, NotChecked=0, Total=17292 [2018-07-23 15:31:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-07-23 15:31:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-07-23 15:31:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-07-23 15:31:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-07-23 15:31:19,771 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-07-23 15:31:19,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:19,771 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-07-23 15:31:19,771 INFO L472 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-07-23 15:31:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-07-23 15:31:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-07-23 15:31:19,772 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:19,772 INFO L353 BasicCegarLoop]: trace histogram [130, 1, 1] [2018-07-23 15:31:19,772 INFO L414 AbstractCegarLoop]: === Iteration 131 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:19,772 INFO L82 PathProgramCache]: Analyzing trace with hash -413753229, now seen corresponding path program 130 times [2018-07-23 15:31:19,772 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:20,654 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 15:31:20,655 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:20,655 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131] total 131 [2018-07-23 15:31:20,655 INFO L450 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-07-23 15:31:20,656 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-07-23 15:31:20,656 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=17293, Unknown=0, NotChecked=0, Total=17556 [2018-07-23 15:31:20,657 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 133 states. [2018-07-23 15:31:21,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:21,848 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-07-23 15:31:21,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-07-23 15:31:21,849 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 132 [2018-07-23 15:31:21,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:21,849 INFO L225 Difference]: With dead ends: 135 [2018-07-23 15:31:21,849 INFO L226 Difference]: Without dead ends: 134 [2018-07-23 15:31:21,851 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=17293, Unknown=0, NotChecked=0, Total=17556 [2018-07-23 15:31:21,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-07-23 15:31:21,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-07-23 15:31:21,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-07-23 15:31:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-07-23 15:31:21,858 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-07-23 15:31:21,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:21,858 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-07-23 15:31:21,858 INFO L472 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-07-23 15:31:21,859 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-07-23 15:31:21,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-07-23 15:31:21,859 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:21,859 INFO L353 BasicCegarLoop]: trace histogram [131, 1, 1] [2018-07-23 15:31:21,859 INFO L414 AbstractCegarLoop]: === Iteration 132 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:21,860 INFO L82 PathProgramCache]: Analyzing trace with hash 58552024, now seen corresponding path program 131 times [2018-07-23 15:31:21,860 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:22,771 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 15:31:22,771 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:22,772 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132] total 132 [2018-07-23 15:31:22,772 INFO L450 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-07-23 15:31:22,772 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-07-23 15:31:22,773 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=17557, Unknown=0, NotChecked=0, Total=17822 [2018-07-23 15:31:22,773 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-07-23 15:31:23,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:23,985 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-07-23 15:31:23,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-07-23 15:31:23,986 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-07-23 15:31:23,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:23,986 INFO L225 Difference]: With dead ends: 136 [2018-07-23 15:31:23,986 INFO L226 Difference]: Without dead ends: 135 [2018-07-23 15:31:23,988 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=17557, Unknown=0, NotChecked=0, Total=17822 [2018-07-23 15:31:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-07-23 15:31:23,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-07-23 15:31:23,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-07-23 15:31:23,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-07-23 15:31:23,993 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-07-23 15:31:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:23,993 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-07-23 15:31:23,993 INFO L472 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-07-23 15:31:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-07-23 15:31:23,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-07-23 15:31:23,994 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:23,994 INFO L353 BasicCegarLoop]: trace histogram [132, 1, 1] [2018-07-23 15:31:23,994 INFO L414 AbstractCegarLoop]: === Iteration 133 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:23,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1815112979, now seen corresponding path program 132 times [2018-07-23 15:31:23,995 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:24,788 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 15:31:24,788 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:24,788 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133] total 133 [2018-07-23 15:31:24,788 INFO L450 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-07-23 15:31:24,789 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-07-23 15:31:24,789 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=17823, Unknown=0, NotChecked=0, Total=18090 [2018-07-23 15:31:24,790 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 135 states. [2018-07-23 15:31:26,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:26,024 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-07-23 15:31:26,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-07-23 15:31:26,024 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 134 [2018-07-23 15:31:26,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:26,025 INFO L225 Difference]: With dead ends: 137 [2018-07-23 15:31:26,025 INFO L226 Difference]: Without dead ends: 136 [2018-07-23 15:31:26,026 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=17823, Unknown=0, NotChecked=0, Total=18090 [2018-07-23 15:31:26,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-07-23 15:31:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-07-23 15:31:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-07-23 15:31:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-07-23 15:31:26,031 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-07-23 15:31:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:26,032 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-07-23 15:31:26,032 INFO L472 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-07-23 15:31:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-07-23 15:31:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-07-23 15:31:26,032 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:26,032 INFO L353 BasicCegarLoop]: trace histogram [133, 1, 1] [2018-07-23 15:31:26,032 INFO L414 AbstractCegarLoop]: === Iteration 134 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:26,032 INFO L82 PathProgramCache]: Analyzing trace with hash 433927736, now seen corresponding path program 133 times [2018-07-23 15:31:26,032 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:26,904 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 15:31:26,904 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:26,905 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134] total 134 [2018-07-23 15:31:26,905 INFO L450 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-07-23 15:31:26,905 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-07-23 15:31:26,906 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=18091, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:31:26,906 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-07-23 15:31:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:28,130 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-07-23 15:31:28,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-07-23 15:31:28,131 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-07-23 15:31:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:28,131 INFO L225 Difference]: With dead ends: 138 [2018-07-23 15:31:28,131 INFO L226 Difference]: Without dead ends: 137 [2018-07-23 15:31:28,133 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=269, Invalid=18091, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:31:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-07-23 15:31:28,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-07-23 15:31:28,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-07-23 15:31:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-07-23 15:31:28,140 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-07-23 15:31:28,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:28,140 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-07-23 15:31:28,140 INFO L472 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-07-23 15:31:28,140 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-07-23 15:31:28,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-07-23 15:31:28,141 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:28,141 INFO L353 BasicCegarLoop]: trace histogram [134, 1, 1] [2018-07-23 15:31:28,141 INFO L414 AbstractCegarLoop]: === Iteration 135 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:28,142 INFO L82 PathProgramCache]: Analyzing trace with hash 566858163, now seen corresponding path program 134 times [2018-07-23 15:31:28,142 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:28,975 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 15:31:28,975 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:28,976 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135] total 135 [2018-07-23 15:31:28,976 INFO L450 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-07-23 15:31:28,976 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-07-23 15:31:28,977 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=18361, Unknown=0, NotChecked=0, Total=18632 [2018-07-23 15:31:28,978 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 137 states. [2018-07-23 15:31:30,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:30,267 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-07-23 15:31:30,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-07-23 15:31:30,267 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 136 [2018-07-23 15:31:30,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:30,268 INFO L225 Difference]: With dead ends: 139 [2018-07-23 15:31:30,268 INFO L226 Difference]: Without dead ends: 138 [2018-07-23 15:31:30,269 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=271, Invalid=18361, Unknown=0, NotChecked=0, Total=18632 [2018-07-23 15:31:30,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-07-23 15:31:30,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-07-23 15:31:30,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-07-23 15:31:30,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-07-23 15:31:30,275 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-07-23 15:31:30,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:30,275 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-07-23 15:31:30,275 INFO L472 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-07-23 15:31:30,275 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-07-23 15:31:30,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-07-23 15:31:30,276 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:30,276 INFO L353 BasicCegarLoop]: trace histogram [135, 1, 1] [2018-07-23 15:31:30,276 INFO L414 AbstractCegarLoop]: === Iteration 136 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:30,276 INFO L82 PathProgramCache]: Analyzing trace with hash 392734104, now seen corresponding path program 135 times [2018-07-23 15:31:30,276 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:31,238 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 15:31:31,239 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:31,239 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136] total 136 [2018-07-23 15:31:31,239 INFO L450 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-07-23 15:31:31,239 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-07-23 15:31:31,240 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=18633, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:31:31,240 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-07-23 15:31:32,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:32,501 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-07-23 15:31:32,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-07-23 15:31:32,501 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-07-23 15:31:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:32,502 INFO L225 Difference]: With dead ends: 140 [2018-07-23 15:31:32,502 INFO L226 Difference]: Without dead ends: 139 [2018-07-23 15:31:32,503 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=18633, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:31:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-07-23 15:31:32,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-07-23 15:31:32,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-07-23 15:31:32,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-07-23 15:31:32,509 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-07-23 15:31:32,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:32,509 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-07-23 15:31:32,509 INFO L472 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-07-23 15:31:32,509 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-07-23 15:31:32,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-07-23 15:31:32,509 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:32,509 INFO L353 BasicCegarLoop]: trace histogram [136, 1, 1] [2018-07-23 15:31:32,510 INFO L414 AbstractCegarLoop]: === Iteration 137 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:32,510 INFO L82 PathProgramCache]: Analyzing trace with hash -710144429, now seen corresponding path program 136 times [2018-07-23 15:31:32,510 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:33,478 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 15:31:33,478 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:33,478 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137] total 137 [2018-07-23 15:31:33,478 INFO L450 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-07-23 15:31:33,479 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-07-23 15:31:33,479 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=18907, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 15:31:33,480 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 139 states. [2018-07-23 15:31:34,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:34,831 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-07-23 15:31:34,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-07-23 15:31:34,831 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 138 [2018-07-23 15:31:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:34,831 INFO L225 Difference]: With dead ends: 141 [2018-07-23 15:31:34,831 INFO L226 Difference]: Without dead ends: 140 [2018-07-23 15:31:34,832 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=18907, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 15:31:34,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-07-23 15:31:34,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-07-23 15:31:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-07-23 15:31:34,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-07-23 15:31:34,837 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-07-23 15:31:34,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:34,837 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-07-23 15:31:34,837 INFO L472 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-07-23 15:31:34,837 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-07-23 15:31:34,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-07-23 15:31:34,838 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:34,838 INFO L353 BasicCegarLoop]: trace histogram [137, 1, 1] [2018-07-23 15:31:34,838 INFO L414 AbstractCegarLoop]: === Iteration 138 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:34,838 INFO L82 PathProgramCache]: Analyzing trace with hash -539640584, now seen corresponding path program 137 times [2018-07-23 15:31:34,839 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:35,790 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 15:31:35,791 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:35,791 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138] total 138 [2018-07-23 15:31:35,791 INFO L450 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-07-23 15:31:35,791 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-07-23 15:31:35,793 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=19183, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:31:35,793 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-07-23 15:31:37,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:37,116 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-07-23 15:31:37,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-07-23 15:31:37,116 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-07-23 15:31:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:37,117 INFO L225 Difference]: With dead ends: 142 [2018-07-23 15:31:37,117 INFO L226 Difference]: Without dead ends: 141 [2018-07-23 15:31:37,118 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=19183, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:31:37,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-07-23 15:31:37,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-07-23 15:31:37,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-07-23 15:31:37,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-07-23 15:31:37,124 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-07-23 15:31:37,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:37,124 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-07-23 15:31:37,124 INFO L472 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-07-23 15:31:37,124 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-07-23 15:31:37,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-07-23 15:31:37,124 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:37,124 INFO L353 BasicCegarLoop]: trace histogram [138, 1, 1] [2018-07-23 15:31:37,125 INFO L414 AbstractCegarLoop]: === Iteration 139 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:37,125 INFO L82 PathProgramCache]: Analyzing trace with hash 451011315, now seen corresponding path program 138 times [2018-07-23 15:31:37,125 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:38,114 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 15:31:38,115 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:38,115 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139] total 139 [2018-07-23 15:31:38,115 INFO L450 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-07-23 15:31:38,115 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-07-23 15:31:38,116 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=19461, Unknown=0, NotChecked=0, Total=19740 [2018-07-23 15:31:38,116 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 141 states. [2018-07-23 15:31:39,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:39,462 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-07-23 15:31:39,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-07-23 15:31:39,462 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 140 [2018-07-23 15:31:39,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:39,463 INFO L225 Difference]: With dead ends: 143 [2018-07-23 15:31:39,463 INFO L226 Difference]: Without dead ends: 142 [2018-07-23 15:31:39,463 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=19461, Unknown=0, NotChecked=0, Total=19740 [2018-07-23 15:31:39,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-07-23 15:31:39,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-07-23 15:31:39,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-07-23 15:31:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-07-23 15:31:39,468 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2018-07-23 15:31:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:39,469 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-07-23 15:31:39,469 INFO L472 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-07-23 15:31:39,469 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-07-23 15:31:39,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-07-23 15:31:39,469 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:39,469 INFO L353 BasicCegarLoop]: trace histogram [139, 1, 1] [2018-07-23 15:31:39,469 INFO L414 AbstractCegarLoop]: === Iteration 140 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:39,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1096449112, now seen corresponding path program 139 times [2018-07-23 15:31:39,470 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:40,443 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 15:31:40,443 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:40,443 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140] total 140 [2018-07-23 15:31:40,444 INFO L450 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-07-23 15:31:40,444 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-07-23 15:31:40,445 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=19741, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:31:40,445 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-07-23 15:31:41,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:41,799 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-07-23 15:31:41,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-07-23 15:31:41,799 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-07-23 15:31:41,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:41,800 INFO L225 Difference]: With dead ends: 144 [2018-07-23 15:31:41,800 INFO L226 Difference]: Without dead ends: 143 [2018-07-23 15:31:41,801 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=19741, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:31:41,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-07-23 15:31:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-07-23 15:31:41,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-07-23 15:31:41,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-07-23 15:31:41,806 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2018-07-23 15:31:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:41,807 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-07-23 15:31:41,807 INFO L472 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-07-23 15:31:41,807 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-07-23 15:31:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-07-23 15:31:41,807 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:41,807 INFO L353 BasicCegarLoop]: trace histogram [140, 1, 1] [2018-07-23 15:31:41,807 INFO L414 AbstractCegarLoop]: === Iteration 141 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:41,808 INFO L82 PathProgramCache]: Analyzing trace with hash -369815661, now seen corresponding path program 140 times [2018-07-23 15:31:41,808 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:42,848 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 15:31:42,848 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:42,848 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141] total 141 [2018-07-23 15:31:42,849 INFO L450 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-07-23 15:31:42,849 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-07-23 15:31:42,849 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=20023, Unknown=0, NotChecked=0, Total=20306 [2018-07-23 15:31:42,849 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 143 states. [2018-07-23 15:31:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:44,201 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-07-23 15:31:44,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-07-23 15:31:44,201 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 142 [2018-07-23 15:31:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:44,202 INFO L225 Difference]: With dead ends: 145 [2018-07-23 15:31:44,202 INFO L226 Difference]: Without dead ends: 144 [2018-07-23 15:31:44,203 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=283, Invalid=20023, Unknown=0, NotChecked=0, Total=20306 [2018-07-23 15:31:44,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-07-23 15:31:44,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-07-23 15:31:44,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-07-23 15:31:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-07-23 15:31:44,208 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2018-07-23 15:31:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:44,208 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-07-23 15:31:44,208 INFO L472 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-07-23 15:31:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-07-23 15:31:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-07-23 15:31:44,209 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:44,209 INFO L353 BasicCegarLoop]: trace histogram [141, 1, 1] [2018-07-23 15:31:44,209 INFO L414 AbstractCegarLoop]: === Iteration 142 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:44,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1420616632, now seen corresponding path program 141 times [2018-07-23 15:31:44,210 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:45,226 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 15:31:45,227 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:45,227 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142] total 142 [2018-07-23 15:31:45,227 INFO L450 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-07-23 15:31:45,227 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-07-23 15:31:45,228 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=20307, Unknown=0, NotChecked=0, Total=20592 [2018-07-23 15:31:45,228 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-07-23 15:31:46,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:46,637 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-07-23 15:31:46,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-07-23 15:31:46,637 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-07-23 15:31:46,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:46,638 INFO L225 Difference]: With dead ends: 146 [2018-07-23 15:31:46,638 INFO L226 Difference]: Without dead ends: 145 [2018-07-23 15:31:46,639 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=285, Invalid=20307, Unknown=0, NotChecked=0, Total=20592 [2018-07-23 15:31:46,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-07-23 15:31:46,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-07-23 15:31:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-07-23 15:31:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-07-23 15:31:46,645 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2018-07-23 15:31:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:46,645 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-07-23 15:31:46,645 INFO L472 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-07-23 15:31:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-07-23 15:31:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-07-23 15:31:46,645 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:46,645 INFO L353 BasicCegarLoop]: trace histogram [142, 1, 1] [2018-07-23 15:31:46,646 INFO L414 AbstractCegarLoop]: === Iteration 143 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:46,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1089442867, now seen corresponding path program 142 times [2018-07-23 15:31:46,646 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:47,753 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 15:31:47,754 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:47,754 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143] total 143 [2018-07-23 15:31:47,754 INFO L450 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-07-23 15:31:47,755 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-07-23 15:31:47,756 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=20593, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 15:31:47,756 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 145 states. [2018-07-23 15:31:49,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:49,172 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-07-23 15:31:49,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-07-23 15:31:49,172 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 144 [2018-07-23 15:31:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:49,172 INFO L225 Difference]: With dead ends: 147 [2018-07-23 15:31:49,172 INFO L226 Difference]: Without dead ends: 146 [2018-07-23 15:31:49,173 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=287, Invalid=20593, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 15:31:49,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-07-23 15:31:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-07-23 15:31:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-07-23 15:31:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-07-23 15:31:49,179 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2018-07-23 15:31:49,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:49,179 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-07-23 15:31:49,179 INFO L472 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-07-23 15:31:49,179 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-07-23 15:31:49,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-07-23 15:31:49,180 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:49,180 INFO L353 BasicCegarLoop]: trace histogram [143, 1, 1] [2018-07-23 15:31:49,180 INFO L414 AbstractCegarLoop]: === Iteration 144 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:49,180 INFO L82 PathProgramCache]: Analyzing trace with hash -587009256, now seen corresponding path program 143 times [2018-07-23 15:31:49,180 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:50,251 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 15:31:50,251 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:50,251 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144] total 144 [2018-07-23 15:31:50,252 INFO L450 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-07-23 15:31:50,252 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-07-23 15:31:50,253 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=20881, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:31:50,253 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-07-23 15:31:51,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:51,695 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-07-23 15:31:51,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-07-23 15:31:51,695 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-07-23 15:31:51,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:51,695 INFO L225 Difference]: With dead ends: 148 [2018-07-23 15:31:51,695 INFO L226 Difference]: Without dead ends: 147 [2018-07-23 15:31:51,696 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=20881, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:31:51,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-07-23 15:31:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-07-23 15:31:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-07-23 15:31:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-07-23 15:31:51,702 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2018-07-23 15:31:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:51,703 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-07-23 15:31:51,703 INFO L472 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-07-23 15:31:51,703 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-07-23 15:31:51,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-07-23 15:31:51,703 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:51,703 INFO L353 BasicCegarLoop]: trace histogram [144, 1, 1] [2018-07-23 15:31:51,703 INFO L414 AbstractCegarLoop]: === Iteration 145 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:51,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1017417517, now seen corresponding path program 144 times [2018-07-23 15:31:51,704 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:52,762 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 15:31:52,762 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:52,762 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145] total 145 [2018-07-23 15:31:52,762 INFO L450 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-07-23 15:31:52,763 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-07-23 15:31:52,764 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=21171, Unknown=0, NotChecked=0, Total=21462 [2018-07-23 15:31:52,764 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 147 states. [2018-07-23 15:31:54,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:54,227 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-07-23 15:31:54,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-07-23 15:31:54,227 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 146 [2018-07-23 15:31:54,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:54,227 INFO L225 Difference]: With dead ends: 149 [2018-07-23 15:31:54,227 INFO L226 Difference]: Without dead ends: 148 [2018-07-23 15:31:54,229 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=291, Invalid=21171, Unknown=0, NotChecked=0, Total=21462 [2018-07-23 15:31:54,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-07-23 15:31:54,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-07-23 15:31:54,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-07-23 15:31:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-07-23 15:31:54,234 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2018-07-23 15:31:54,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:54,234 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-07-23 15:31:54,234 INFO L472 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-07-23 15:31:54,234 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-07-23 15:31:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-07-23 15:31:54,235 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:54,235 INFO L353 BasicCegarLoop]: trace histogram [145, 1, 1] [2018-07-23 15:31:54,235 INFO L414 AbstractCegarLoop]: === Iteration 146 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:54,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1475171720, now seen corresponding path program 145 times [2018-07-23 15:31:54,235 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:55,362 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 15:31:55,363 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:55,363 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146] total 146 [2018-07-23 15:31:55,363 INFO L450 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-07-23 15:31:55,363 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-07-23 15:31:55,364 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=21463, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:31:55,364 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-07-23 15:31:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:56,808 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-07-23 15:31:56,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-07-23 15:31:56,809 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-07-23 15:31:56,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:56,809 INFO L225 Difference]: With dead ends: 150 [2018-07-23 15:31:56,809 INFO L226 Difference]: Without dead ends: 149 [2018-07-23 15:31:56,810 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=293, Invalid=21463, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:31:56,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-07-23 15:31:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-07-23 15:31:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-07-23 15:31:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-07-23 15:31:56,816 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2018-07-23 15:31:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:56,816 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-07-23 15:31:56,816 INFO L472 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-07-23 15:31:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-07-23 15:31:56,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-07-23 15:31:56,816 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:56,816 INFO L353 BasicCegarLoop]: trace histogram [146, 1, 1] [2018-07-23 15:31:56,817 INFO L414 AbstractCegarLoop]: === Iteration 147 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:56,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1514317171, now seen corresponding path program 146 times [2018-07-23 15:31:56,817 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:57,902 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 15:31:57,903 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:57,903 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147] total 147 [2018-07-23 15:31:57,903 INFO L450 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-07-23 15:31:57,903 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-07-23 15:31:57,904 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=21757, Unknown=0, NotChecked=0, Total=22052 [2018-07-23 15:31:57,905 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 149 states. [2018-07-23 15:31:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:59,444 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-07-23 15:31:59,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-07-23 15:31:59,445 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 148 [2018-07-23 15:31:59,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:59,445 INFO L225 Difference]: With dead ends: 151 [2018-07-23 15:31:59,445 INFO L226 Difference]: Without dead ends: 150 [2018-07-23 15:31:59,446 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=295, Invalid=21757, Unknown=0, NotChecked=0, Total=22052 [2018-07-23 15:31:59,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-07-23 15:31:59,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-07-23 15:31:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-07-23 15:31:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-07-23 15:31:59,453 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 148 [2018-07-23 15:31:59,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:59,454 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-07-23 15:31:59,454 INFO L472 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-07-23 15:31:59,454 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-07-23 15:31:59,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-07-23 15:31:59,455 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:59,455 INFO L353 BasicCegarLoop]: trace histogram [147, 1, 1] [2018-07-23 15:31:59,455 INFO L414 AbstractCegarLoop]: === Iteration 148 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:59,455 INFO L82 PathProgramCache]: Analyzing trace with hash -300807720, now seen corresponding path program 147 times [2018-07-23 15:31:59,455 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:00,567 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 15:32:00,568 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:00,568 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148] total 148 [2018-07-23 15:32:00,568 INFO L450 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-07-23 15:32:00,568 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-07-23 15:32:00,569 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=22053, Unknown=0, NotChecked=0, Total=22350 [2018-07-23 15:32:00,569 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-07-23 15:32:02,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:02,098 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-07-23 15:32:02,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-07-23 15:32:02,098 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-07-23 15:32:02,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:02,099 INFO L225 Difference]: With dead ends: 152 [2018-07-23 15:32:02,099 INFO L226 Difference]: Without dead ends: 151 [2018-07-23 15:32:02,101 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=297, Invalid=22053, Unknown=0, NotChecked=0, Total=22350 [2018-07-23 15:32:02,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-07-23 15:32:02,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-07-23 15:32:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-07-23 15:32:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-07-23 15:32:02,109 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 149 [2018-07-23 15:32:02,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:02,109 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-07-23 15:32:02,109 INFO L472 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-07-23 15:32:02,109 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-07-23 15:32:02,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-07-23 15:32:02,110 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:02,110 INFO L353 BasicCegarLoop]: trace histogram [148, 1, 1] [2018-07-23 15:32:02,110 INFO L414 AbstractCegarLoop]: === Iteration 149 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:02,110 INFO L82 PathProgramCache]: Analyzing trace with hash -735104493, now seen corresponding path program 148 times [2018-07-23 15:32:02,110 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:03,270 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 15:32:03,271 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:03,271 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149] total 149 [2018-07-23 15:32:03,271 INFO L450 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-07-23 15:32:03,271 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-07-23 15:32:03,272 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=22351, Unknown=0, NotChecked=0, Total=22650 [2018-07-23 15:32:03,272 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 151 states. [2018-07-23 15:32:04,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:04,778 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-07-23 15:32:04,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-07-23 15:32:04,778 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 150 [2018-07-23 15:32:04,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:04,779 INFO L225 Difference]: With dead ends: 153 [2018-07-23 15:32:04,779 INFO L226 Difference]: Without dead ends: 152 [2018-07-23 15:32:04,780 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=22351, Unknown=0, NotChecked=0, Total=22650 [2018-07-23 15:32:04,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-07-23 15:32:04,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-07-23 15:32:04,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-07-23 15:32:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-07-23 15:32:04,788 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 150 [2018-07-23 15:32:04,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:04,788 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-07-23 15:32:04,788 INFO L472 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-07-23 15:32:04,788 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-07-23 15:32:04,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-07-23 15:32:04,789 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:04,789 INFO L353 BasicCegarLoop]: trace histogram [149, 1, 1] [2018-07-23 15:32:04,789 INFO L414 AbstractCegarLoop]: === Iteration 150 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:04,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1313402568, now seen corresponding path program 149 times [2018-07-23 15:32:04,790 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:05,946 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 15:32:05,947 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:05,947 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150] total 150 [2018-07-23 15:32:05,947 INFO L450 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-07-23 15:32:05,947 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-07-23 15:32:05,948 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=22651, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:32:05,948 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-07-23 15:32:07,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:07,519 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-07-23 15:32:07,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-07-23 15:32:07,519 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-07-23 15:32:07,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:07,519 INFO L225 Difference]: With dead ends: 154 [2018-07-23 15:32:07,520 INFO L226 Difference]: Without dead ends: 153 [2018-07-23 15:32:07,521 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=22651, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:32:07,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-07-23 15:32:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-07-23 15:32:07,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-07-23 15:32:07,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-07-23 15:32:07,529 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 151 [2018-07-23 15:32:07,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:07,530 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-07-23 15:32:07,530 INFO L472 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-07-23 15:32:07,530 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-07-23 15:32:07,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-07-23 15:32:07,530 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:07,531 INFO L353 BasicCegarLoop]: trace histogram [150, 1, 1] [2018-07-23 15:32:07,531 INFO L414 AbstractCegarLoop]: === Iteration 151 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:07,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2060773709, now seen corresponding path program 150 times [2018-07-23 15:32:07,531 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:08,748 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 15:32:08,748 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:08,749 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151] total 151 [2018-07-23 15:32:08,749 INFO L450 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-07-23 15:32:08,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-07-23 15:32:08,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=22953, Unknown=0, NotChecked=0, Total=23256 [2018-07-23 15:32:08,750 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 153 states. [2018-07-23 15:32:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:10,343 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-07-23 15:32:10,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-07-23 15:32:10,343 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 152 [2018-07-23 15:32:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:10,343 INFO L225 Difference]: With dead ends: 155 [2018-07-23 15:32:10,344 INFO L226 Difference]: Without dead ends: 154 [2018-07-23 15:32:10,345 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=22953, Unknown=0, NotChecked=0, Total=23256 [2018-07-23 15:32:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-07-23 15:32:10,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-07-23 15:32:10,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-07-23 15:32:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-07-23 15:32:10,351 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 152 [2018-07-23 15:32:10,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:10,351 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-07-23 15:32:10,351 INFO L472 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-07-23 15:32:10,351 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-07-23 15:32:10,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-07-23 15:32:10,351 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:10,351 INFO L353 BasicCegarLoop]: trace histogram [151, 1, 1] [2018-07-23 15:32:10,352 INFO L414 AbstractCegarLoop]: === Iteration 152 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:10,352 INFO L82 PathProgramCache]: Analyzing trace with hash 540524696, now seen corresponding path program 151 times [2018-07-23 15:32:10,352 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:11,598 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 15:32:11,598 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:11,599 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152] total 152 [2018-07-23 15:32:11,599 INFO L450 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-07-23 15:32:11,599 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-07-23 15:32:11,600 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=23257, Unknown=0, NotChecked=0, Total=23562 [2018-07-23 15:32:11,600 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-07-23 15:32:13,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:13,168 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2018-07-23 15:32:13,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-07-23 15:32:13,168 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-07-23 15:32:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:13,168 INFO L225 Difference]: With dead ends: 156 [2018-07-23 15:32:13,168 INFO L226 Difference]: Without dead ends: 155 [2018-07-23 15:32:13,169 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=305, Invalid=23257, Unknown=0, NotChecked=0, Total=23562 [2018-07-23 15:32:13,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-07-23 15:32:13,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-07-23 15:32:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-07-23 15:32:13,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-07-23 15:32:13,175 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 153 [2018-07-23 15:32:13,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:13,175 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-07-23 15:32:13,175 INFO L472 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-07-23 15:32:13,175 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-07-23 15:32:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-07-23 15:32:13,175 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:13,176 INFO L353 BasicCegarLoop]: trace histogram [152, 1, 1] [2018-07-23 15:32:13,176 INFO L414 AbstractCegarLoop]: === Iteration 153 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:13,176 INFO L82 PathProgramCache]: Analyzing trace with hash -423603373, now seen corresponding path program 152 times [2018-07-23 15:32:13,176 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:14,359 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 15:32:14,359 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:14,360 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153] total 153 [2018-07-23 15:32:14,360 INFO L450 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-07-23 15:32:14,360 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-07-23 15:32:14,361 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=23563, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:32:14,361 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 155 states. [2018-07-23 15:32:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:16,040 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-07-23 15:32:16,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-07-23 15:32:16,040 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 154 [2018-07-23 15:32:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:16,040 INFO L225 Difference]: With dead ends: 157 [2018-07-23 15:32:16,040 INFO L226 Difference]: Without dead ends: 156 [2018-07-23 15:32:16,041 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=307, Invalid=23563, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:32:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-07-23 15:32:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-07-23 15:32:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-07-23 15:32:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-07-23 15:32:16,047 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 154 [2018-07-23 15:32:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:16,047 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-07-23 15:32:16,047 INFO L472 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-07-23 15:32:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-07-23 15:32:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-07-23 15:32:16,047 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:16,047 INFO L353 BasicCegarLoop]: trace histogram [153, 1, 1] [2018-07-23 15:32:16,048 INFO L414 AbstractCegarLoop]: === Iteration 154 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:16,048 INFO L82 PathProgramCache]: Analyzing trace with hash -246802440, now seen corresponding path program 153 times [2018-07-23 15:32:16,048 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:17,255 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 15:32:17,255 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:17,255 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154] total 154 [2018-07-23 15:32:17,255 INFO L450 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-07-23 15:32:17,256 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-07-23 15:32:17,257 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=23871, Unknown=0, NotChecked=0, Total=24180 [2018-07-23 15:32:17,257 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-07-23 15:32:18,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:18,935 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-07-23 15:32:18,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-07-23 15:32:18,935 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-07-23 15:32:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:18,936 INFO L225 Difference]: With dead ends: 158 [2018-07-23 15:32:18,936 INFO L226 Difference]: Without dead ends: 157 [2018-07-23 15:32:18,937 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=309, Invalid=23871, Unknown=0, NotChecked=0, Total=24180 [2018-07-23 15:32:18,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-07-23 15:32:18,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-07-23 15:32:18,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-07-23 15:32:18,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-07-23 15:32:18,945 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 155 [2018-07-23 15:32:18,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:18,945 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-07-23 15:32:18,945 INFO L472 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-07-23 15:32:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-07-23 15:32:18,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-07-23 15:32:18,946 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:18,946 INFO L353 BasicCegarLoop]: trace histogram [154, 1, 1] [2018-07-23 15:32:18,946 INFO L414 AbstractCegarLoop]: === Iteration 155 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:18,947 INFO L82 PathProgramCache]: Analyzing trace with hash 939059187, now seen corresponding path program 154 times [2018-07-23 15:32:18,947 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:20,205 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 15:32:20,205 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:20,206 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155] total 155 [2018-07-23 15:32:20,206 INFO L450 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-07-23 15:32:20,206 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-07-23 15:32:20,207 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=24181, Unknown=0, NotChecked=0, Total=24492 [2018-07-23 15:32:20,207 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 157 states. [2018-07-23 15:32:21,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:21,862 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-07-23 15:32:21,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-07-23 15:32:21,862 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 156 [2018-07-23 15:32:21,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:21,863 INFO L225 Difference]: With dead ends: 159 [2018-07-23 15:32:21,863 INFO L226 Difference]: Without dead ends: 158 [2018-07-23 15:32:21,864 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=24181, Unknown=0, NotChecked=0, Total=24492 [2018-07-23 15:32:21,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-07-23 15:32:21,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-07-23 15:32:21,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-07-23 15:32:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-07-23 15:32:21,870 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 156 [2018-07-23 15:32:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:21,870 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-07-23 15:32:21,870 INFO L472 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-07-23 15:32:21,870 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-07-23 15:32:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-07-23 15:32:21,871 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:21,871 INFO L353 BasicCegarLoop]: trace histogram [155, 1, 1] [2018-07-23 15:32:21,871 INFO L414 AbstractCegarLoop]: === Iteration 156 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:21,871 INFO L82 PathProgramCache]: Analyzing trace with hash -953936040, now seen corresponding path program 155 times [2018-07-23 15:32:21,872 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:23,143 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 15:32:23,144 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:23,144 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156] total 156 [2018-07-23 15:32:23,144 INFO L450 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-07-23 15:32:23,144 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-07-23 15:32:23,145 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=24493, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:32:23,145 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-07-23 15:32:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:24,884 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-07-23 15:32:24,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-07-23 15:32:24,884 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-07-23 15:32:24,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:24,885 INFO L225 Difference]: With dead ends: 160 [2018-07-23 15:32:24,885 INFO L226 Difference]: Without dead ends: 159 [2018-07-23 15:32:24,885 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=24493, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:32:24,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-07-23 15:32:24,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-07-23 15:32:24,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-07-23 15:32:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-07-23 15:32:24,891 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 157 [2018-07-23 15:32:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:24,891 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-07-23 15:32:24,891 INFO L472 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-07-23 15:32:24,892 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-07-23 15:32:24,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-07-23 15:32:24,892 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:24,892 INFO L353 BasicCegarLoop]: trace histogram [156, 1, 1] [2018-07-23 15:32:24,892 INFO L414 AbstractCegarLoop]: === Iteration 157 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:24,892 INFO L82 PathProgramCache]: Analyzing trace with hash 492754067, now seen corresponding path program 156 times [2018-07-23 15:32:24,892 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:26,156 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 15:32:26,157 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:26,157 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157] total 157 [2018-07-23 15:32:26,157 INFO L450 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-07-23 15:32:26,157 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-07-23 15:32:26,158 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=24807, Unknown=0, NotChecked=0, Total=25122 [2018-07-23 15:32:26,159 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 159 states. [2018-07-23 15:32:27,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:27,898 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-07-23 15:32:27,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-07-23 15:32:27,898 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 158 [2018-07-23 15:32:27,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:27,899 INFO L225 Difference]: With dead ends: 161 [2018-07-23 15:32:27,899 INFO L226 Difference]: Without dead ends: 160 [2018-07-23 15:32:27,900 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=315, Invalid=24807, Unknown=0, NotChecked=0, Total=25122 [2018-07-23 15:32:27,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-07-23 15:32:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-07-23 15:32:27,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-07-23 15:32:27,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-07-23 15:32:27,906 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 158 [2018-07-23 15:32:27,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:27,906 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-07-23 15:32:27,906 INFO L472 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-07-23 15:32:27,906 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-07-23 15:32:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-07-23 15:32:27,907 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:27,907 INFO L353 BasicCegarLoop]: trace histogram [157, 1, 1] [2018-07-23 15:32:27,907 INFO L414 AbstractCegarLoop]: === Iteration 158 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:27,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1904492872, now seen corresponding path program 157 times [2018-07-23 15:32:27,907 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:29,194 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 15:32:29,194 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:29,195 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158] total 158 [2018-07-23 15:32:29,195 INFO L450 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-07-23 15:32:29,195 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-07-23 15:32:29,196 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=25123, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:32:29,196 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-07-23 15:32:30,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:30,919 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-07-23 15:32:30,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-07-23 15:32:30,919 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-07-23 15:32:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:30,920 INFO L225 Difference]: With dead ends: 162 [2018-07-23 15:32:30,920 INFO L226 Difference]: Without dead ends: 161 [2018-07-23 15:32:30,921 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=317, Invalid=25123, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:32:30,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-07-23 15:32:30,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-07-23 15:32:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-07-23 15:32:30,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-07-23 15:32:30,928 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 159 [2018-07-23 15:32:30,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:30,928 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-07-23 15:32:30,928 INFO L472 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-07-23 15:32:30,928 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-07-23 15:32:30,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-07-23 15:32:30,928 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:30,928 INFO L353 BasicCegarLoop]: trace histogram [158, 1, 1] [2018-07-23 15:32:30,928 INFO L414 AbstractCegarLoop]: === Iteration 159 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:30,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1090263347, now seen corresponding path program 158 times [2018-07-23 15:32:30,929 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:32,288 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 15:32:32,288 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:32,288 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159] total 159 [2018-07-23 15:32:32,288 INFO L450 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-07-23 15:32:32,289 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-07-23 15:32:32,289 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=25441, Unknown=0, NotChecked=0, Total=25760 [2018-07-23 15:32:32,289 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 161 states. [2018-07-23 15:32:34,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:34,008 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-07-23 15:32:34,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-07-23 15:32:34,008 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 160 [2018-07-23 15:32:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:34,009 INFO L225 Difference]: With dead ends: 163 [2018-07-23 15:32:34,009 INFO L226 Difference]: Without dead ends: 162 [2018-07-23 15:32:34,010 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=319, Invalid=25441, Unknown=0, NotChecked=0, Total=25760 [2018-07-23 15:32:34,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-07-23 15:32:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-07-23 15:32:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-07-23 15:32:34,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-07-23 15:32:34,016 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 160 [2018-07-23 15:32:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:34,016 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-07-23 15:32:34,016 INFO L472 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-07-23 15:32:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-07-23 15:32:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-07-23 15:32:34,017 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:34,017 INFO L353 BasicCegarLoop]: trace histogram [159, 1, 1] [2018-07-23 15:32:34,017 INFO L414 AbstractCegarLoop]: === Iteration 160 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:34,017 INFO L82 PathProgramCache]: Analyzing trace with hash -561574376, now seen corresponding path program 159 times [2018-07-23 15:32:34,017 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:35,191 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 15:32:35,191 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:35,192 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160] total 160 [2018-07-23 15:32:35,192 INFO L450 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-07-23 15:32:35,192 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-07-23 15:32:35,193 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=25761, Unknown=0, NotChecked=0, Total=26082 [2018-07-23 15:32:35,193 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-07-23 15:32:37,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:37,038 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2018-07-23 15:32:37,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-07-23 15:32:37,039 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-07-23 15:32:37,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:37,039 INFO L225 Difference]: With dead ends: 164 [2018-07-23 15:32:37,039 INFO L226 Difference]: Without dead ends: 163 [2018-07-23 15:32:37,040 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=321, Invalid=25761, Unknown=0, NotChecked=0, Total=26082 [2018-07-23 15:32:37,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-07-23 15:32:37,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-07-23 15:32:37,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-07-23 15:32:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-07-23 15:32:37,047 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 161 [2018-07-23 15:32:37,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:37,047 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-07-23 15:32:37,047 INFO L472 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-07-23 15:32:37,047 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-07-23 15:32:37,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-07-23 15:32:37,047 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:37,048 INFO L353 BasicCegarLoop]: trace histogram [160, 1, 1] [2018-07-23 15:32:37,048 INFO L414 AbstractCegarLoop]: === Iteration 161 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:37,048 INFO L82 PathProgramCache]: Analyzing trace with hash -228936237, now seen corresponding path program 160 times [2018-07-23 15:32:37,048 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:38,346 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 15:32:38,347 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:38,347 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161] total 161 [2018-07-23 15:32:38,347 INFO L450 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-07-23 15:32:38,347 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-07-23 15:32:38,349 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=26083, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:32:38,349 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 163 states. [2018-07-23 15:32:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:40,207 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-07-23 15:32:40,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-07-23 15:32:40,208 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 162 [2018-07-23 15:32:40,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:40,208 INFO L225 Difference]: With dead ends: 165 [2018-07-23 15:32:40,208 INFO L226 Difference]: Without dead ends: 164 [2018-07-23 15:32:40,210 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=323, Invalid=26083, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:32:40,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-07-23 15:32:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-07-23 15:32:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-07-23 15:32:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-07-23 15:32:40,219 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 162 [2018-07-23 15:32:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:40,219 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-07-23 15:32:40,219 INFO L472 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-07-23 15:32:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-07-23 15:32:40,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-07-23 15:32:40,220 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:40,220 INFO L353 BasicCegarLoop]: trace histogram [161, 1, 1] [2018-07-23 15:32:40,220 INFO L414 AbstractCegarLoop]: === Iteration 162 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:40,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1492911480, now seen corresponding path program 161 times [2018-07-23 15:32:40,220 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:41,620 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 15:32:41,620 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:41,620 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [162] total 162 [2018-07-23 15:32:41,621 INFO L450 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-07-23 15:32:41,621 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-07-23 15:32:41,622 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=26407, Unknown=0, NotChecked=0, Total=26732 [2018-07-23 15:32:41,622 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 164 states. [2018-07-23 15:32:43,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:43,472 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-07-23 15:32:43,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-07-23 15:32:43,472 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 163 [2018-07-23 15:32:43,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:43,472 INFO L225 Difference]: With dead ends: 166 [2018-07-23 15:32:43,472 INFO L226 Difference]: Without dead ends: 165 [2018-07-23 15:32:43,475 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=26407, Unknown=0, NotChecked=0, Total=26732 [2018-07-23 15:32:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-07-23 15:32:43,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-07-23 15:32:43,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-07-23 15:32:43,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-07-23 15:32:43,481 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 163 [2018-07-23 15:32:43,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:43,481 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-07-23 15:32:43,481 INFO L472 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-07-23 15:32:43,481 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-07-23 15:32:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-07-23 15:32:43,482 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:43,482 INFO L353 BasicCegarLoop]: trace histogram [162, 1, 1] [2018-07-23 15:32:43,482 INFO L414 AbstractCegarLoop]: === Iteration 163 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:43,482 INFO L82 PathProgramCache]: Analyzing trace with hash -964384141, now seen corresponding path program 162 times [2018-07-23 15:32:43,483 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:45,005 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 15:32:45,006 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:45,006 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163] total 163 [2018-07-23 15:32:45,006 INFO L450 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-07-23 15:32:45,006 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-07-23 15:32:45,007 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=26733, Unknown=0, NotChecked=0, Total=27060 [2018-07-23 15:32:45,007 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 165 states. [2018-07-23 15:32:46,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:46,861 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-07-23 15:32:46,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-07-23 15:32:46,862 INFO L78 Accepts]: Start accepts. Automaton has 165 states. Word has length 164 [2018-07-23 15:32:46,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:46,862 INFO L225 Difference]: With dead ends: 167 [2018-07-23 15:32:46,862 INFO L226 Difference]: Without dead ends: 166 [2018-07-23 15:32:46,863 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=327, Invalid=26733, Unknown=0, NotChecked=0, Total=27060 [2018-07-23 15:32:46,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-07-23 15:32:46,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-07-23 15:32:46,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-07-23 15:32:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-07-23 15:32:46,873 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 164 [2018-07-23 15:32:46,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:46,873 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-07-23 15:32:46,873 INFO L472 AbstractCegarLoop]: Interpolant automaton has 165 states. [2018-07-23 15:32:46,874 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-07-23 15:32:46,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-07-23 15:32:46,874 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:46,874 INFO L353 BasicCegarLoop]: trace histogram [163, 1, 1] [2018-07-23 15:32:46,874 INFO L414 AbstractCegarLoop]: === Iteration 164 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:46,875 INFO L82 PathProgramCache]: Analyzing trace with hash 168862936, now seen corresponding path program 163 times [2018-07-23 15:32:46,875 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:48,116 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 15:32:48,116 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:48,116 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164] total 164 [2018-07-23 15:32:48,117 INFO L450 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-07-23 15:32:48,117 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-07-23 15:32:48,118 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=27061, Unknown=0, NotChecked=0, Total=27390 [2018-07-23 15:32:48,118 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 166 states. [2018-07-23 15:32:50,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:50,032 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2018-07-23 15:32:50,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-07-23 15:32:50,032 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 165 [2018-07-23 15:32:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:50,032 INFO L225 Difference]: With dead ends: 168 [2018-07-23 15:32:50,032 INFO L226 Difference]: Without dead ends: 167 [2018-07-23 15:32:50,033 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=329, Invalid=27061, Unknown=0, NotChecked=0, Total=27390 [2018-07-23 15:32:50,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-07-23 15:32:50,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-07-23 15:32:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-07-23 15:32:50,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-07-23 15:32:50,039 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 165 [2018-07-23 15:32:50,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:50,039 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-07-23 15:32:50,039 INFO L472 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-07-23 15:32:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-07-23 15:32:50,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-07-23 15:32:50,040 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:50,040 INFO L353 BasicCegarLoop]: trace histogram [164, 1, 1] [2018-07-23 15:32:50,040 INFO L414 AbstractCegarLoop]: === Iteration 165 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:50,040 INFO L82 PathProgramCache]: Analyzing trace with hash 939783955, now seen corresponding path program 164 times [2018-07-23 15:32:50,040 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:51,432 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 15:32:51,433 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:51,433 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165] total 165 [2018-07-23 15:32:51,433 INFO L450 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-07-23 15:32:51,433 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-07-23 15:32:51,435 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=27391, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:32:51,435 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 167 states. [2018-07-23 15:32:53,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:53,423 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-07-23 15:32:53,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-07-23 15:32:53,423 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 166 [2018-07-23 15:32:53,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:53,424 INFO L225 Difference]: With dead ends: 169 [2018-07-23 15:32:53,424 INFO L226 Difference]: Without dead ends: 168 [2018-07-23 15:32:53,425 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=331, Invalid=27391, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:32:53,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-07-23 15:32:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-07-23 15:32:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-07-23 15:32:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-07-23 15:32:53,431 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 166 [2018-07-23 15:32:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:53,431 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-07-23 15:32:53,431 INFO L472 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-07-23 15:32:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-07-23 15:32:53,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-07-23 15:32:53,432 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:53,432 INFO L353 BasicCegarLoop]: trace histogram [165, 1, 1] [2018-07-23 15:32:53,432 INFO L414 AbstractCegarLoop]: === Iteration 166 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:53,432 INFO L82 PathProgramCache]: Analyzing trace with hash -931468232, now seen corresponding path program 165 times [2018-07-23 15:32:53,432 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:54,851 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 15:32:54,852 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:54,852 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [166] total 166 [2018-07-23 15:32:54,852 INFO L450 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-07-23 15:32:54,852 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-07-23 15:32:54,854 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=27723, Unknown=0, NotChecked=0, Total=28056 [2018-07-23 15:32:54,854 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 168 states. [2018-07-23 15:32:56,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:56,849 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-07-23 15:32:56,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-07-23 15:32:56,849 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 167 [2018-07-23 15:32:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:56,850 INFO L225 Difference]: With dead ends: 170 [2018-07-23 15:32:56,850 INFO L226 Difference]: Without dead ends: 169 [2018-07-23 15:32:56,852 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=333, Invalid=27723, Unknown=0, NotChecked=0, Total=28056 [2018-07-23 15:32:56,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-07-23 15:32:56,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-07-23 15:32:56,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-07-23 15:32:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-07-23 15:32:56,858 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 167 [2018-07-23 15:32:56,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:56,858 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-07-23 15:32:56,859 INFO L472 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-07-23 15:32:56,859 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-07-23 15:32:56,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-07-23 15:32:56,859 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:56,859 INFO L353 BasicCegarLoop]: trace histogram [166, 1, 1] [2018-07-23 15:32:56,859 INFO L414 AbstractCegarLoop]: === Iteration 167 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:56,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1189256115, now seen corresponding path program 166 times [2018-07-23 15:32:56,859 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:58,334 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 15:32:58,335 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:58,335 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167] total 167 [2018-07-23 15:32:58,335 INFO L450 AbstractCegarLoop]: Interpolant automaton has 169 states [2018-07-23 15:32:58,335 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2018-07-23 15:32:58,337 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=28057, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:32:58,337 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 169 states. [2018-07-23 15:33:00,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:00,294 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-07-23 15:33:00,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2018-07-23 15:33:00,294 INFO L78 Accepts]: Start accepts. Automaton has 169 states. Word has length 168 [2018-07-23 15:33:00,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:00,294 INFO L225 Difference]: With dead ends: 171 [2018-07-23 15:33:00,294 INFO L226 Difference]: Without dead ends: 170 [2018-07-23 15:33:00,296 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=335, Invalid=28057, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:33:00,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-07-23 15:33:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-07-23 15:33:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-07-23 15:33:00,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-07-23 15:33:00,305 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 168 [2018-07-23 15:33:00,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:00,305 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-07-23 15:33:00,305 INFO L472 AbstractCegarLoop]: Interpolant automaton has 169 states. [2018-07-23 15:33:00,305 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-07-23 15:33:00,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-07-23 15:33:00,306 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:00,306 INFO L353 BasicCegarLoop]: trace histogram [167, 1, 1] [2018-07-23 15:33:00,306 INFO L414 AbstractCegarLoop]: === Iteration 168 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:00,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1787765864, now seen corresponding path program 167 times [2018-07-23 15:33:00,306 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:01,650 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 15:33:01,650 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:01,650 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [168] total 168 [2018-07-23 15:33:01,650 INFO L450 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-07-23 15:33:01,651 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-07-23 15:33:01,651 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=28393, Unknown=0, NotChecked=0, Total=28730 [2018-07-23 15:33:01,651 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 170 states. [2018-07-23 15:33:03,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:03,592 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-07-23 15:33:03,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2018-07-23 15:33:03,592 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 169 [2018-07-23 15:33:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:03,593 INFO L225 Difference]: With dead ends: 172 [2018-07-23 15:33:03,593 INFO L226 Difference]: Without dead ends: 171 [2018-07-23 15:33:03,594 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=337, Invalid=28393, Unknown=0, NotChecked=0, Total=28730 [2018-07-23 15:33:03,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-07-23 15:33:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-07-23 15:33:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-07-23 15:33:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-07-23 15:33:03,601 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 169 [2018-07-23 15:33:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:03,602 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-07-23 15:33:03,602 INFO L472 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-07-23 15:33:03,602 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-07-23 15:33:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-07-23 15:33:03,602 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:03,602 INFO L353 BasicCegarLoop]: trace histogram [168, 1, 1] [2018-07-23 15:33:03,602 INFO L414 AbstractCegarLoop]: === Iteration 169 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:03,602 INFO L82 PathProgramCache]: Analyzing trace with hash 413833299, now seen corresponding path program 168 times [2018-07-23 15:33:03,603 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:05,072 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 15:33:05,072 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:05,072 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [169] total 169 [2018-07-23 15:33:05,073 INFO L450 AbstractCegarLoop]: Interpolant automaton has 171 states [2018-07-23 15:33:05,073 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2018-07-23 15:33:05,074 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=28731, Unknown=0, NotChecked=0, Total=29070 [2018-07-23 15:33:05,074 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 171 states. [2018-07-23 15:33:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:07,051 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-07-23 15:33:07,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2018-07-23 15:33:07,051 INFO L78 Accepts]: Start accepts. Automaton has 171 states. Word has length 170 [2018-07-23 15:33:07,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:07,052 INFO L225 Difference]: With dead ends: 173 [2018-07-23 15:33:07,052 INFO L226 Difference]: Without dead ends: 172 [2018-07-23 15:33:07,052 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=339, Invalid=28731, Unknown=0, NotChecked=0, Total=29070 [2018-07-23 15:33:07,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-07-23 15:33:07,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-07-23 15:33:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-07-23 15:33:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-07-23 15:33:07,059 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 170 [2018-07-23 15:33:07,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:07,059 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-07-23 15:33:07,059 INFO L472 AbstractCegarLoop]: Interpolant automaton has 171 states. [2018-07-23 15:33:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-07-23 15:33:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-07-23 15:33:07,059 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:07,060 INFO L353 BasicCegarLoop]: trace histogram [169, 1, 1] [2018-07-23 15:33:07,060 INFO L414 AbstractCegarLoop]: === Iteration 170 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:07,060 INFO L82 PathProgramCache]: Analyzing trace with hash -56069384, now seen corresponding path program 169 times [2018-07-23 15:33:07,060 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:08,545 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 15:33:08,545 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:08,545 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [170] total 170 [2018-07-23 15:33:08,546 INFO L450 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-07-23 15:33:08,546 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-07-23 15:33:08,547 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=29071, Unknown=0, NotChecked=0, Total=29412 [2018-07-23 15:33:08,547 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 172 states. [2018-07-23 15:33:10,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:10,610 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2018-07-23 15:33:10,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2018-07-23 15:33:10,610 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 171 [2018-07-23 15:33:10,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:10,610 INFO L225 Difference]: With dead ends: 174 [2018-07-23 15:33:10,610 INFO L226 Difference]: Without dead ends: 173 [2018-07-23 15:33:10,611 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=341, Invalid=29071, Unknown=0, NotChecked=0, Total=29412 [2018-07-23 15:33:10,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-07-23 15:33:10,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-07-23 15:33:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-07-23 15:33:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-07-23 15:33:10,617 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 171 [2018-07-23 15:33:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:10,618 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-07-23 15:33:10,618 INFO L472 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-07-23 15:33:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-07-23 15:33:10,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-07-23 15:33:10,618 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:10,618 INFO L353 BasicCegarLoop]: trace histogram [170, 1, 1] [2018-07-23 15:33:10,618 INFO L414 AbstractCegarLoop]: === Iteration 171 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:10,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1738150669, now seen corresponding path program 170 times [2018-07-23 15:33:10,619 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:12,111 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 15:33:12,112 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:12,112 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [171] total 171 [2018-07-23 15:33:12,113 INFO L450 AbstractCegarLoop]: Interpolant automaton has 173 states [2018-07-23 15:33:12,113 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2018-07-23 15:33:12,115 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=29413, Unknown=0, NotChecked=0, Total=29756 [2018-07-23 15:33:12,115 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 173 states. [2018-07-23 15:33:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:14,229 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-07-23 15:33:14,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2018-07-23 15:33:14,229 INFO L78 Accepts]: Start accepts. Automaton has 173 states. Word has length 172 [2018-07-23 15:33:14,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:14,230 INFO L225 Difference]: With dead ends: 175 [2018-07-23 15:33:14,230 INFO L226 Difference]: Without dead ends: 174 [2018-07-23 15:33:14,230 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=343, Invalid=29413, Unknown=0, NotChecked=0, Total=29756 [2018-07-23 15:33:14,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-07-23 15:33:14,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-07-23 15:33:14,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-07-23 15:33:14,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-07-23 15:33:14,237 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 172 [2018-07-23 15:33:14,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:14,237 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-07-23 15:33:14,237 INFO L472 AbstractCegarLoop]: Interpolant automaton has 173 states. [2018-07-23 15:33:14,238 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-07-23 15:33:14,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-07-23 15:33:14,238 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:14,238 INFO L353 BasicCegarLoop]: trace histogram [171, 1, 1] [2018-07-23 15:33:14,238 INFO L414 AbstractCegarLoop]: === Iteration 172 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:14,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1951904344, now seen corresponding path program 171 times [2018-07-23 15:33:14,239 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:15,764 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 15:33:15,765 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:15,765 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [172] total 172 [2018-07-23 15:33:15,765 INFO L450 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-07-23 15:33:15,765 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-07-23 15:33:15,767 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=29757, Unknown=0, NotChecked=0, Total=30102 [2018-07-23 15:33:15,767 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 174 states. [2018-07-23 15:33:17,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:17,880 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2018-07-23 15:33:17,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2018-07-23 15:33:17,881 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 173 [2018-07-23 15:33:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:17,881 INFO L225 Difference]: With dead ends: 176 [2018-07-23 15:33:17,881 INFO L226 Difference]: Without dead ends: 175 [2018-07-23 15:33:17,883 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=345, Invalid=29757, Unknown=0, NotChecked=0, Total=30102 [2018-07-23 15:33:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-07-23 15:33:17,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-07-23 15:33:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-07-23 15:33:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-07-23 15:33:17,890 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 173 [2018-07-23 15:33:17,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:17,890 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-07-23 15:33:17,890 INFO L472 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-07-23 15:33:17,890 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-07-23 15:33:17,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-07-23 15:33:17,891 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:17,891 INFO L353 BasicCegarLoop]: trace histogram [172, 1, 1] [2018-07-23 15:33:17,891 INFO L414 AbstractCegarLoop]: === Iteration 173 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:17,891 INFO L82 PathProgramCache]: Analyzing trace with hash 379492755, now seen corresponding path program 172 times [2018-07-23 15:33:17,891 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:19,515 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 15:33:19,516 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:19,516 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [173] total 173 [2018-07-23 15:33:19,516 INFO L450 AbstractCegarLoop]: Interpolant automaton has 175 states [2018-07-23 15:33:19,516 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2018-07-23 15:33:19,518 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=30103, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:33:19,518 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 175 states. [2018-07-23 15:33:21,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:21,713 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-07-23 15:33:21,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2018-07-23 15:33:21,713 INFO L78 Accepts]: Start accepts. Automaton has 175 states. Word has length 174 [2018-07-23 15:33:21,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:21,714 INFO L225 Difference]: With dead ends: 177 [2018-07-23 15:33:21,714 INFO L226 Difference]: Without dead ends: 176 [2018-07-23 15:33:21,716 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=347, Invalid=30103, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:33:21,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-07-23 15:33:21,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-07-23 15:33:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-07-23 15:33:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-07-23 15:33:21,726 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 174 [2018-07-23 15:33:21,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:21,726 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-07-23 15:33:21,726 INFO L472 AbstractCegarLoop]: Interpolant automaton has 175 states. [2018-07-23 15:33:21,726 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-07-23 15:33:21,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-07-23 15:33:21,727 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:21,727 INFO L353 BasicCegarLoop]: trace histogram [173, 1, 1] [2018-07-23 15:33:21,727 INFO L414 AbstractCegarLoop]: === Iteration 174 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:21,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1120626248, now seen corresponding path program 173 times [2018-07-23 15:33:21,727 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:23,371 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 15:33:23,371 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:23,371 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [174] total 174 [2018-07-23 15:33:23,371 INFO L450 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-07-23 15:33:23,372 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-07-23 15:33:23,373 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=30451, Unknown=0, NotChecked=0, Total=30800 [2018-07-23 15:33:23,373 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 176 states. [2018-07-23 15:33:25,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:25,513 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-07-23 15:33:25,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2018-07-23 15:33:25,513 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 175 [2018-07-23 15:33:25,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:25,514 INFO L225 Difference]: With dead ends: 178 [2018-07-23 15:33:25,514 INFO L226 Difference]: Without dead ends: 177 [2018-07-23 15:33:25,515 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=349, Invalid=30451, Unknown=0, NotChecked=0, Total=30800 [2018-07-23 15:33:25,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-07-23 15:33:25,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-07-23 15:33:25,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-07-23 15:33:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-07-23 15:33:25,522 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 175 [2018-07-23 15:33:25,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:25,523 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-07-23 15:33:25,523 INFO L472 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-07-23 15:33:25,523 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-07-23 15:33:25,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-07-23 15:33:25,523 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:25,523 INFO L353 BasicCegarLoop]: trace histogram [174, 1, 1] [2018-07-23 15:33:25,523 INFO L414 AbstractCegarLoop]: === Iteration 175 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:25,524 INFO L82 PathProgramCache]: Analyzing trace with hash -379675085, now seen corresponding path program 174 times [2018-07-23 15:33:25,524 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:27,205 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 15:33:27,206 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:27,206 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [175] total 175 [2018-07-23 15:33:27,206 INFO L450 AbstractCegarLoop]: Interpolant automaton has 177 states [2018-07-23 15:33:27,206 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2018-07-23 15:33:27,207 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=30801, Unknown=0, NotChecked=0, Total=31152 [2018-07-23 15:33:27,207 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 177 states. [2018-07-23 15:33:29,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:29,416 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-07-23 15:33:29,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2018-07-23 15:33:29,416 INFO L78 Accepts]: Start accepts. Automaton has 177 states. Word has length 176 [2018-07-23 15:33:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:29,417 INFO L225 Difference]: With dead ends: 179 [2018-07-23 15:33:29,417 INFO L226 Difference]: Without dead ends: 178 [2018-07-23 15:33:29,419 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=351, Invalid=30801, Unknown=0, NotChecked=0, Total=31152 [2018-07-23 15:33:29,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-07-23 15:33:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-07-23 15:33:29,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-07-23 15:33:29,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-07-23 15:33:29,427 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 176 [2018-07-23 15:33:29,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:29,427 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-07-23 15:33:29,427 INFO L472 AbstractCegarLoop]: Interpolant automaton has 177 states. [2018-07-23 15:33:29,427 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-07-23 15:33:29,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-07-23 15:33:29,427 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:29,428 INFO L353 BasicCegarLoop]: trace histogram [175, 1, 1] [2018-07-23 15:33:29,428 INFO L414 AbstractCegarLoop]: === Iteration 176 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:29,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1114974488, now seen corresponding path program 175 times [2018-07-23 15:33:29,428 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:31,186 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 15:33:31,187 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:31,187 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [176] total 176 [2018-07-23 15:33:31,187 INFO L450 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-07-23 15:33:31,187 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-07-23 15:33:31,188 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=31153, Unknown=0, NotChecked=0, Total=31506 [2018-07-23 15:33:31,188 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 178 states. [2018-07-23 15:33:33,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:33,433 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2018-07-23 15:33:33,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2018-07-23 15:33:33,433 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 177 [2018-07-23 15:33:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:33,434 INFO L225 Difference]: With dead ends: 180 [2018-07-23 15:33:33,434 INFO L226 Difference]: Without dead ends: 179 [2018-07-23 15:33:33,435 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=353, Invalid=31153, Unknown=0, NotChecked=0, Total=31506 [2018-07-23 15:33:33,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-07-23 15:33:33,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-07-23 15:33:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-07-23 15:33:33,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-07-23 15:33:33,442 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 177 [2018-07-23 15:33:33,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:33,442 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-07-23 15:33:33,442 INFO L472 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-07-23 15:33:33,442 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-07-23 15:33:33,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-07-23 15:33:33,443 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:33,443 INFO L353 BasicCegarLoop]: trace histogram [176, 1, 1] [2018-07-23 15:33:33,443 INFO L414 AbstractCegarLoop]: === Iteration 177 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:33,443 INFO L82 PathProgramCache]: Analyzing trace with hash 204470995, now seen corresponding path program 176 times [2018-07-23 15:33:33,443 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:35,227 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 15:33:35,228 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:35,228 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [177] total 177 [2018-07-23 15:33:35,228 INFO L450 AbstractCegarLoop]: Interpolant automaton has 179 states [2018-07-23 15:33:35,228 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2018-07-23 15:33:35,229 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=31507, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:33:35,229 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 179 states. [2018-07-23 15:33:37,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:37,489 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-07-23 15:33:37,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2018-07-23 15:33:37,489 INFO L78 Accepts]: Start accepts. Automaton has 179 states. Word has length 178 [2018-07-23 15:33:37,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:37,490 INFO L225 Difference]: With dead ends: 181 [2018-07-23 15:33:37,490 INFO L226 Difference]: Without dead ends: 180 [2018-07-23 15:33:37,491 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=355, Invalid=31507, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:33:37,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-07-23 15:33:37,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-07-23 15:33:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-07-23 15:33:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2018-07-23 15:33:37,502 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 178 [2018-07-23 15:33:37,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:37,502 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2018-07-23 15:33:37,502 INFO L472 AbstractCegarLoop]: Interpolant automaton has 179 states. [2018-07-23 15:33:37,502 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2018-07-23 15:33:37,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-07-23 15:33:37,503 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:37,503 INFO L353 BasicCegarLoop]: trace histogram [177, 1, 1] [2018-07-23 15:33:37,503 INFO L414 AbstractCegarLoop]: === Iteration 178 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:37,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2043633784, now seen corresponding path program 177 times [2018-07-23 15:33:37,504 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:39,388 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 15:33:39,389 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:39,389 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [178] total 178 [2018-07-23 15:33:39,437 INFO L450 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-07-23 15:33:39,438 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-07-23 15:33:39,438 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=31863, Unknown=0, NotChecked=0, Total=32220 [2018-07-23 15:33:39,439 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand 180 states. [2018-07-23 15:33:41,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:41,703 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-07-23 15:33:41,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2018-07-23 15:33:41,703 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 179 [2018-07-23 15:33:41,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:41,704 INFO L225 Difference]: With dead ends: 182 [2018-07-23 15:33:41,704 INFO L226 Difference]: Without dead ends: 181 [2018-07-23 15:33:41,705 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=357, Invalid=31863, Unknown=0, NotChecked=0, Total=32220 [2018-07-23 15:33:41,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-07-23 15:33:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-07-23 15:33:41,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-07-23 15:33:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-07-23 15:33:41,713 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 179 [2018-07-23 15:33:41,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:41,713 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-07-23 15:33:41,713 INFO L472 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-07-23 15:33:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-07-23 15:33:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-07-23 15:33:41,714 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:41,714 INFO L353 BasicCegarLoop]: trace histogram [178, 1, 1] [2018-07-23 15:33:41,715 INFO L414 AbstractCegarLoop]: === Iteration 179 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:41,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1071861901, now seen corresponding path program 178 times [2018-07-23 15:33:41,715 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15931 backedges. 0 proven. 15931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:43,490 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:43,491 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [179] total 179 [2018-07-23 15:33:43,491 INFO L450 AbstractCegarLoop]: Interpolant automaton has 181 states [2018-07-23 15:33:43,491 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2018-07-23 15:33:43,493 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=32221, Unknown=0, NotChecked=0, Total=32580 [2018-07-23 15:33:43,493 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 181 states. [2018-07-23 15:33:45,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:45,835 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-07-23 15:33:45,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2018-07-23 15:33:45,836 INFO L78 Accepts]: Start accepts. Automaton has 181 states. Word has length 180 [2018-07-23 15:33:45,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:45,836 INFO L225 Difference]: With dead ends: 183 [2018-07-23 15:33:45,836 INFO L226 Difference]: Without dead ends: 182 [2018-07-23 15:33:45,837 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=359, Invalid=32221, Unknown=0, NotChecked=0, Total=32580 [2018-07-23 15:33:45,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-07-23 15:33:45,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-07-23 15:33:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-07-23 15:33:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-07-23 15:33:45,844 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 180 [2018-07-23 15:33:45,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:45,844 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-07-23 15:33:45,844 INFO L472 AbstractCegarLoop]: Interpolant automaton has 181 states. [2018-07-23 15:33:45,845 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-07-23 15:33:45,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-07-23 15:33:45,845 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:45,845 INFO L353 BasicCegarLoop]: trace histogram [179, 1, 1] [2018-07-23 15:33:45,845 INFO L414 AbstractCegarLoop]: === Iteration 180 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:45,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1132019672, now seen corresponding path program 179 times [2018-07-23 15:33:45,845 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:47,611 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:47,611 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [180] total 180 [2018-07-23 15:33:47,611 INFO L450 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-07-23 15:33:47,611 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-07-23 15:33:47,613 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=32581, Unknown=0, NotChecked=0, Total=32942 [2018-07-23 15:33:47,613 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 182 states. [2018-07-23 15:33:50,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:50,005 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2018-07-23 15:33:50,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2018-07-23 15:33:50,006 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 181 [2018-07-23 15:33:50,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:50,006 INFO L225 Difference]: With dead ends: 184 [2018-07-23 15:33:50,007 INFO L226 Difference]: Without dead ends: 183 [2018-07-23 15:33:50,007 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=361, Invalid=32581, Unknown=0, NotChecked=0, Total=32942 [2018-07-23 15:33:50,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-07-23 15:33:50,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-07-23 15:33:50,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-07-23 15:33:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-07-23 15:33:50,014 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 181 [2018-07-23 15:33:50,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:50,014 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-07-23 15:33:50,014 INFO L472 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-07-23 15:33:50,014 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-07-23 15:33:50,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-07-23 15:33:50,015 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:50,015 INFO L353 BasicCegarLoop]: trace histogram [180, 1, 1] [2018-07-23 15:33:50,015 INFO L414 AbstractCegarLoop]: === Iteration 181 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:50,015 INFO L82 PathProgramCache]: Analyzing trace with hash 732871699, now seen corresponding path program 180 times [2018-07-23 15:33:50,015 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16290 backedges. 0 proven. 16290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:51,785 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:51,786 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [181] total 181 [2018-07-23 15:33:51,786 INFO L450 AbstractCegarLoop]: Interpolant automaton has 183 states [2018-07-23 15:33:51,786 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2018-07-23 15:33:51,788 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=32943, Unknown=0, NotChecked=0, Total=33306 [2018-07-23 15:33:51,788 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 183 states. [2018-07-23 15:33:54,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:54,195 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-07-23 15:33:54,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2018-07-23 15:33:54,195 INFO L78 Accepts]: Start accepts. Automaton has 183 states. Word has length 182 [2018-07-23 15:33:54,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:54,196 INFO L225 Difference]: With dead ends: 185 [2018-07-23 15:33:54,196 INFO L226 Difference]: Without dead ends: 184 [2018-07-23 15:33:54,197 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=363, Invalid=32943, Unknown=0, NotChecked=0, Total=33306 [2018-07-23 15:33:54,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-07-23 15:33:54,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-07-23 15:33:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-07-23 15:33:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-07-23 15:33:54,204 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 182 [2018-07-23 15:33:54,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:54,204 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-07-23 15:33:54,204 INFO L472 AbstractCegarLoop]: Interpolant automaton has 183 states. [2018-07-23 15:33:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-07-23 15:33:54,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-07-23 15:33:54,205 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:54,205 INFO L353 BasicCegarLoop]: trace histogram [181, 1, 1] [2018-07-23 15:33:54,205 INFO L414 AbstractCegarLoop]: === Iteration 182 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:54,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1244186424, now seen corresponding path program 181 times [2018-07-23 15:33:54,205 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:55,957 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:55,957 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [182] total 182 [2018-07-23 15:33:55,957 INFO L450 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-07-23 15:33:55,957 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-07-23 15:33:55,959 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=33307, Unknown=0, NotChecked=0, Total=33672 [2018-07-23 15:33:55,959 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 184 states. [2018-07-23 15:33:58,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:58,336 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2018-07-23 15:33:58,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2018-07-23 15:33:58,336 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 183 [2018-07-23 15:33:58,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:58,337 INFO L225 Difference]: With dead ends: 186 [2018-07-23 15:33:58,337 INFO L226 Difference]: Without dead ends: 185 [2018-07-23 15:33:58,338 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=365, Invalid=33307, Unknown=0, NotChecked=0, Total=33672 [2018-07-23 15:33:58,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-07-23 15:33:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-07-23 15:33:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-07-23 15:33:58,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-07-23 15:33:58,349 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 183 [2018-07-23 15:33:58,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:58,349 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-07-23 15:33:58,349 INFO L472 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-07-23 15:33:58,349 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-07-23 15:33:58,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-07-23 15:33:58,350 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:58,350 INFO L353 BasicCegarLoop]: trace histogram [182, 1, 1] [2018-07-23 15:33:58,350 INFO L414 AbstractCegarLoop]: === Iteration 183 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:58,350 INFO L82 PathProgramCache]: Analyzing trace with hash -84926285, now seen corresponding path program 182 times [2018-07-23 15:33:58,351 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16653 backedges. 0 proven. 16653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:00,124 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:00,124 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [183] total 183 [2018-07-23 15:34:00,124 INFO L450 AbstractCegarLoop]: Interpolant automaton has 185 states [2018-07-23 15:34:00,124 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2018-07-23 15:34:00,126 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=33673, Unknown=0, NotChecked=0, Total=34040 [2018-07-23 15:34:00,126 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 185 states. [2018-07-23 15:34:02,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:02,556 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-07-23 15:34:02,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2018-07-23 15:34:02,556 INFO L78 Accepts]: Start accepts. Automaton has 185 states. Word has length 184 [2018-07-23 15:34:02,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:02,556 INFO L225 Difference]: With dead ends: 187 [2018-07-23 15:34:02,557 INFO L226 Difference]: Without dead ends: 186 [2018-07-23 15:34:02,557 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=367, Invalid=33673, Unknown=0, NotChecked=0, Total=34040 [2018-07-23 15:34:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-07-23 15:34:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-07-23 15:34:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-07-23 15:34:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2018-07-23 15:34:02,564 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 184 [2018-07-23 15:34:02,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:02,565 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2018-07-23 15:34:02,565 INFO L472 AbstractCegarLoop]: Interpolant automaton has 185 states. [2018-07-23 15:34:02,565 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2018-07-23 15:34:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-07-23 15:34:02,565 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:02,565 INFO L353 BasicCegarLoop]: trace histogram [183, 1, 1] [2018-07-23 15:34:02,565 INFO L414 AbstractCegarLoop]: === Iteration 184 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:02,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1662252696, now seen corresponding path program 183 times [2018-07-23 15:34:02,566 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-07-23 15:34:03,118 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 15:34:03,123 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 15:34:03,124 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 03:34:03 BoogieIcfgContainer [2018-07-23 15:34:03,124 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 15:34:03,125 INFO L168 Benchmark]: Toolchain (without parser) took 248547.32 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -512.3 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-07-23 15:34:03,127 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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 15:34:03,127 INFO L168 Benchmark]: Boogie Preprocessor took 51.50 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 15:34:03,127 INFO L168 Benchmark]: RCFGBuilder took 310.45 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 15:34:03,128 INFO L168 Benchmark]: TraceAbstraction took 248181.10 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -522.8 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-07-23 15:34:03,130 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 51.50 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 310.45 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 248181.10 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -522.8 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 30). Cancelled while BasicCegarLoop was analyzing trace of length 186 with TraceHistMax 183, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 43 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 248.1s OverallTime, 184 OverallIterations, 183 TraceHistogramMax, 128.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 366 SDtfs, 1 SDslu, 0 SDs, 0 SdLazy, 1753570 SolverSat, 230 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 86.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16836 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16836 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=186occurred in iteration=183, 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: 0.9s AutomataMinimizationTime, 183 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 4.3s SatisfiabilityAnalysisTime, 109.5s InterpolantComputationTime, 17019 NumberOfCodeBlocks, 17019 NumberOfCodeBlocksAsserted, 183 NumberOfCheckSat, 16836 ConstructedInterpolants, 0 QuantifiedInterpolants, 13087198 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 183 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1021384 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/HiddenEqualityWithBranches.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_15-34-03-140.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_15-34-03-140.csv Completed graceful shutdown