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/LargeConstant-ForwardSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 15:30:05,592 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 15:30:05,595 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 15:30:05,607 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 15:30:05,607 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 15:30:05,609 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 15:30:05,610 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 15:30:05,612 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 15:30:05,613 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 15:30:05,614 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 15:30:05,615 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-07-23 15:30:05,644 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/regression/bpl/AutomizerBpl-nestedInterpolants.epf [2018-07-23 15:30:05,665 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 15:30:05,665 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 15:30:05,667 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 15:30:05,667 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 15:30:05,667 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 15:30:05,667 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 15:30:05,667 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 15:30:05,668 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 15:30:05,728 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 15:30:05,744 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 15:30:05,750 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 15:30:05,752 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 15:30:05,752 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 15:30:05,753 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LargeConstant-ForwardSuccess.bpl [2018-07-23 15:30:05,754 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LargeConstant-ForwardSuccess.bpl' [2018-07-23 15:30:05,806 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 15:30:05,808 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 15:30:05,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 15:30:05,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 15:30:05,809 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 15:30:05,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LargeConstant-ForwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:05" (1/1) ... [2018-07-23 15:30:05,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LargeConstant-ForwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:05" (1/1) ... [2018-07-23 15:30:05,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LargeConstant-ForwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:05" (1/1) ... [2018-07-23 15:30:05,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LargeConstant-ForwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:05" (1/1) ... [2018-07-23 15:30:05,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LargeConstant-ForwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:05" (1/1) ... [2018-07-23 15:30:05,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LargeConstant-ForwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:05" (1/1) ... [2018-07-23 15:30:05,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LargeConstant-ForwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:05" (1/1) ... [2018-07-23 15:30:05,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 15:30:05,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 15:30:05,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 15:30:05,867 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 15:30:05,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LargeConstant-ForwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:05" (1/1) ... [2018-07-23 15:30:05,950 INFO L130 BoogieDeclarations]: Found specification of procedure proc [2018-07-23 15:30:05,950 INFO L138 BoogieDeclarations]: Found implementation of procedure proc [2018-07-23 15:30:06,054 INFO L258 CfgBuilder]: Using library mode [2018-07-23 15:30:06,054 INFO L202 PluginConnector]: Adding new model LargeConstant-ForwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:30:06 BoogieIcfgContainer [2018-07-23 15:30:06,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 15:30:06,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 15:30:06,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 15:30:06,061 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 15:30:06,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LargeConstant-ForwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:05" (1/2) ... [2018-07-23 15:30:06,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b600bb and model type LargeConstant-ForwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 03:30:06, skipping insertion in model container [2018-07-23 15:30:06,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LargeConstant-ForwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:30:06" (2/2) ... [2018-07-23 15:30:06,066 INFO L112 eAbstractionObserver]: Analyzing ICFG LargeConstant-ForwardSuccess.bpl [2018-07-23 15:30:06,076 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 15:30:06,085 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 15:30:06,135 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 15:30:06,136 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 15:30:06,136 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 15:30:06,137 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 15:30:06,137 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 15:30:06,137 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 15:30:06,137 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 15:30:06,137 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 15:30:06,138 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 15:30:06,152 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-07-23 15:30:06,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-07-23 15:30:06,160 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:06,161 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-07-23 15:30:06,161 INFO L414 AbstractCegarLoop]: === Iteration 1 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:06,167 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-07-23 15:30:06,173 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:06,235 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:30:06,235 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-07-23 15:30:06,240 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 15:30:06,251 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 15:30:06,252 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:30:06,254 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-07-23 15:30:06,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:06,280 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-07-23 15:30:06,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 15:30:06,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-07-23 15:30:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:06,293 INFO L225 Difference]: With dead ends: 9 [2018-07-23 15:30:06,293 INFO L226 Difference]: Without dead ends: 6 [2018-07-23 15:30:06,297 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 15:30:06,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-07-23 15:30:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-07-23 15:30:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-07-23 15:30:06,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-07-23 15:30:06,338 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-07-23 15:30:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:06,338 INFO L471 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-07-23 15:30:06,338 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 15:30:06,339 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-07-23 15:30:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-07-23 15:30:06,339 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:06,339 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-07-23 15:30:06,340 INFO L414 AbstractCegarLoop]: === Iteration 2 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:06,340 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-07-23 15:30:06,340 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:06,363 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:06,364 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2018-07-23 15:30:06,366 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:30:06,366 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:30:06,367 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:30:06,367 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 4 states. [2018-07-23 15:30:06,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:06,386 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-07-23 15:30:06,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:30:06,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-07-23 15:30:06,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:06,388 INFO L225 Difference]: With dead ends: 9 [2018-07-23 15:30:06,388 INFO L226 Difference]: Without dead ends: 8 [2018-07-23 15:30:06,389 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 15:30:06,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-07-23 15:30:06,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-07-23 15:30:06,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-07-23 15:30:06,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-07-23 15:30:06,393 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-07-23 15:30:06,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:06,394 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-07-23 15:30:06,394 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:30:06,394 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-07-23 15:30:06,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-23 15:30:06,395 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:06,395 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-07-23 15:30:06,395 INFO L414 AbstractCegarLoop]: === Iteration 3 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:06,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-07-23 15:30:06,396 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:06,435 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:06,435 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-23 15:30:06,435 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 15:30:06,436 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 15:30:06,436 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:30:06,437 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2018-07-23 15:30:06,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:06,458 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-07-23 15:30:06,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 15:30:06,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-07-23 15:30:06,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:06,459 INFO L225 Difference]: With dead ends: 11 [2018-07-23 15:30:06,461 INFO L226 Difference]: Without dead ends: 10 [2018-07-23 15:30:06,461 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 15:30:06,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-07-23 15:30:06,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-07-23 15:30:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-07-23 15:30:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-07-23 15:30:06,468 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-07-23 15:30:06,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:06,468 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-07-23 15:30:06,469 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 15:30:06,469 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-07-23 15:30:06,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-07-23 15:30:06,470 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:06,470 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-07-23 15:30:06,470 INFO L414 AbstractCegarLoop]: === Iteration 4 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:06,470 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-07-23 15:30:06,471 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:06,534 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:06,534 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:30:06,535 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:30:06,535 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:30:06,535 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:30:06,536 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-07-23 15:30:06,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:06,555 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-07-23 15:30:06,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:30:06,555 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-07-23 15:30:06,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:06,556 INFO L225 Difference]: With dead ends: 13 [2018-07-23 15:30:06,556 INFO L226 Difference]: Without dead ends: 12 [2018-07-23 15:30:06,557 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 15:30:06,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-23 15:30:06,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-07-23 15:30:06,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-23 15:30:06,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-07-23 15:30:06,561 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-07-23 15:30:06,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:06,561 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-07-23 15:30:06,561 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:30:06,561 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-07-23 15:30:06,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-23 15:30:06,562 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:06,562 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-07-23 15:30:06,562 INFO L414 AbstractCegarLoop]: === Iteration 5 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:06,563 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-07-23 15:30:06,563 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:06,603 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:06,604 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:30:06,604 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 15:30:06,604 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 15:30:06,605 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:30:06,605 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2018-07-23 15:30:06,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:06,638 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-07-23 15:30:06,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 15:30:06,639 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-07-23 15:30:06,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:06,642 INFO L225 Difference]: With dead ends: 15 [2018-07-23 15:30:06,643 INFO L226 Difference]: Without dead ends: 14 [2018-07-23 15:30:06,643 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 15:30:06,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-23 15:30:06,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-23 15:30:06,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-23 15:30:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-07-23 15:30:06,651 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-07-23 15:30:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:06,652 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-07-23 15:30:06,652 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 15:30:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-07-23 15:30:06,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-23 15:30:06,653 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:06,653 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-07-23 15:30:06,653 INFO L414 AbstractCegarLoop]: === Iteration 6 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:06,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-07-23 15:30:06,654 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:06,719 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:06,720 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-23 15:30:06,720 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 15:30:06,720 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 15:30:06,721 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:30:06,721 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2018-07-23 15:30:06,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:06,742 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-07-23 15:30:06,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 15:30:06,743 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-07-23 15:30:06,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:06,743 INFO L225 Difference]: With dead ends: 17 [2018-07-23 15:30:06,743 INFO L226 Difference]: Without dead ends: 16 [2018-07-23 15:30:06,744 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 15:30:06,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-23 15:30:06,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-07-23 15:30:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-23 15:30:06,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-07-23 15:30:06,755 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-07-23 15:30:06,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:06,755 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-07-23 15:30:06,755 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 15:30:06,756 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-07-23 15:30:06,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-23 15:30:06,757 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:06,757 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-07-23 15:30:06,757 INFO L414 AbstractCegarLoop]: === Iteration 7 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:06,757 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-07-23 15:30:06,757 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:06,803 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:06,803 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-23 15:30:06,803 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 15:30:06,804 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 15:30:06,804 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:30:06,805 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2018-07-23 15:30:06,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:06,856 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-07-23 15:30:06,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 15:30:06,857 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-07-23 15:30:06,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:06,858 INFO L225 Difference]: With dead ends: 19 [2018-07-23 15:30:06,858 INFO L226 Difference]: Without dead ends: 18 [2018-07-23 15:30:06,859 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 15:30:06,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-23 15:30:06,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-07-23 15:30:06,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-23 15:30:06,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-07-23 15:30:06,869 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-07-23 15:30:06,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:06,870 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-07-23 15:30:06,870 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 15:30:06,870 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-07-23 15:30:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-23 15:30:06,871 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:06,871 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-07-23 15:30:06,871 INFO L414 AbstractCegarLoop]: === Iteration 8 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:06,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-07-23 15:30:06,872 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:06,935 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:06,935 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-23 15:30:06,936 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 15:30:06,936 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 15:30:06,936 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:30:06,937 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2018-07-23 15:30:06,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:06,973 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-07-23 15:30:06,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 15:30:06,973 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-07-23 15:30:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:06,974 INFO L225 Difference]: With dead ends: 21 [2018-07-23 15:30:06,975 INFO L226 Difference]: Without dead ends: 20 [2018-07-23 15:30:06,975 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 15:30:06,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-07-23 15:30:06,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-07-23 15:30:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-23 15:30:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-07-23 15:30:06,981 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-07-23 15:30:06,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:06,981 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-07-23 15:30:06,981 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 15:30:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-07-23 15:30:06,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-23 15:30:06,982 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:06,983 INFO L353 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-07-23 15:30:06,983 INFO L414 AbstractCegarLoop]: === Iteration 9 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:06,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-07-23 15:30:06,983 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:07,052 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:07,053 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 15:30:07,053 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 15:30:07,053 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 15:30:07,054 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:30:07,054 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2018-07-23 15:30:07,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:07,090 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-07-23 15:30:07,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 15:30:07,091 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-07-23 15:30:07,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:07,092 INFO L225 Difference]: With dead ends: 23 [2018-07-23 15:30:07,092 INFO L226 Difference]: Without dead ends: 22 [2018-07-23 15:30:07,093 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 15:30:07,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-07-23 15:30:07,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-07-23 15:30:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-23 15:30:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-07-23 15:30:07,098 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-07-23 15:30:07,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:07,099 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-07-23 15:30:07,099 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 15:30:07,099 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-07-23 15:30:07,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-23 15:30:07,100 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:07,100 INFO L353 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-07-23 15:30:07,100 INFO L414 AbstractCegarLoop]: === Iteration 10 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:07,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-07-23 15:30:07,101 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:07,170 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:07,170 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-23 15:30:07,171 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 15:30:07,171 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 15:30:07,171 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:30:07,172 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 12 states. [2018-07-23 15:30:07,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:07,214 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-07-23 15:30:07,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 15:30:07,215 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-07-23 15:30:07,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:07,216 INFO L225 Difference]: With dead ends: 25 [2018-07-23 15:30:07,216 INFO L226 Difference]: Without dead ends: 24 [2018-07-23 15:30:07,217 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 15:30:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-23 15:30:07,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-07-23 15:30:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-23 15:30:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-07-23 15:30:07,224 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-07-23 15:30:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:07,225 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-07-23 15:30:07,225 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 15:30:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-07-23 15:30:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-23 15:30:07,226 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:07,226 INFO L353 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-07-23 15:30:07,227 INFO L414 AbstractCegarLoop]: === Iteration 11 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:07,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-07-23 15:30:07,227 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:07,309 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:07,310 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-23 15:30:07,310 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 15:30:07,310 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 15:30:07,311 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:30:07,311 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 13 states. [2018-07-23 15:30:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:07,352 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-07-23 15:30:07,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 15:30:07,353 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2018-07-23 15:30:07,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:07,354 INFO L225 Difference]: With dead ends: 27 [2018-07-23 15:30:07,354 INFO L226 Difference]: Without dead ends: 26 [2018-07-23 15:30:07,355 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 15:30:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-07-23 15:30:07,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-07-23 15:30:07,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-23 15:30:07,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-07-23 15:30:07,360 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-07-23 15:30:07,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:07,361 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-07-23 15:30:07,361 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 15:30:07,361 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-07-23 15:30:07,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-23 15:30:07,362 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:07,362 INFO L353 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-07-23 15:30:07,362 INFO L414 AbstractCegarLoop]: === Iteration 12 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:07,363 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-07-23 15:30:07,363 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:07,417 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:07,417 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-07-23 15:30:07,418 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 15:30:07,418 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 15:30:07,418 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:30:07,419 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 14 states. [2018-07-23 15:30:07,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:07,436 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-07-23 15:30:07,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 15:30:07,437 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [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: 29 [2018-07-23 15:30:07,438 INFO L226 Difference]: Without dead ends: 28 [2018-07-23 15:30:07,439 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 15:30:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-07-23 15:30:07,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-07-23 15:30:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-23 15:30:07,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-07-23 15:30:07,445 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-07-23 15:30:07,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:07,445 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-07-23 15:30:07,445 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 15:30:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-07-23 15:30:07,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-23 15:30:07,446 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:07,447 INFO L353 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-07-23 15:30:07,447 INFO L414 AbstractCegarLoop]: === Iteration 13 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:07,447 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-07-23 15:30:07,448 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:07,500 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:07,500 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-23 15:30:07,501 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 15:30:07,501 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 15:30:07,502 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:30:07,502 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 15 states. [2018-07-23 15:30:07,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:07,521 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-07-23 15:30:07,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 15:30:07,522 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2018-07-23 15:30:07,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:07,523 INFO L225 Difference]: With dead ends: 31 [2018-07-23 15:30:07,523 INFO L226 Difference]: Without dead ends: 30 [2018-07-23 15:30:07,524 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 15:30:07,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-23 15:30:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-07-23 15:30:07,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-07-23 15:30:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-07-23 15:30:07,530 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-07-23 15:30:07,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:07,531 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-07-23 15:30:07,531 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 15:30:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-07-23 15:30:07,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-07-23 15:30:07,532 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:07,532 INFO L353 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-07-23 15:30:07,532 INFO L414 AbstractCegarLoop]: === Iteration 14 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:07,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-07-23 15:30:07,533 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:07,604 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:07,604 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-07-23 15:30:07,604 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 15:30:07,605 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 15:30:07,605 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:30:07,609 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 16 states. [2018-07-23 15:30:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:07,642 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-07-23 15:30:07,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 15:30:07,643 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2018-07-23 15:30:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:07,650 INFO L225 Difference]: With dead ends: 33 [2018-07-23 15:30:07,651 INFO L226 Difference]: Without dead ends: 32 [2018-07-23 15:30:07,652 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 15:30:07,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-07-23 15:30:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-07-23 15:30:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-23 15:30:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-07-23 15:30:07,665 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-07-23 15:30:07,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:07,668 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-07-23 15:30:07,668 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 15:30:07,668 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-07-23 15:30:07,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-23 15:30:07,669 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:07,669 INFO L353 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-07-23 15:30:07,670 INFO L414 AbstractCegarLoop]: === Iteration 15 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:07,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-07-23 15:30:07,670 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:07,762 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:07,762 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-23 15:30:07,763 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 15:30:07,763 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 15:30:07,764 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:30:07,764 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 17 states. [2018-07-23 15:30:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:07,797 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-07-23 15:30:07,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 15:30:07,799 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2018-07-23 15:30:07,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:07,800 INFO L225 Difference]: With dead ends: 35 [2018-07-23 15:30:07,800 INFO L226 Difference]: Without dead ends: 34 [2018-07-23 15:30:07,802 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 15:30:07,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-07-23 15:30:07,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-07-23 15:30:07,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-07-23 15:30:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-07-23 15:30:07,811 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-07-23 15:30:07,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:07,812 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-07-23 15:30:07,812 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 15:30:07,812 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-07-23 15:30:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-07-23 15:30:07,815 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:07,815 INFO L353 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-07-23 15:30:07,815 INFO L414 AbstractCegarLoop]: === Iteration 16 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:07,818 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-07-23 15:30:07,818 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:07,910 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:07,910 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-07-23 15:30:07,910 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 15:30:07,911 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 15:30:07,911 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:30:07,911 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 18 states. [2018-07-23 15:30:07,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:07,927 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-07-23 15:30:07,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 15:30:07,928 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-07-23 15:30:07,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:07,928 INFO L225 Difference]: With dead ends: 37 [2018-07-23 15:30:07,929 INFO L226 Difference]: Without dead ends: 36 [2018-07-23 15:30:07,929 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 15:30:07,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-23 15:30:07,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-07-23 15:30:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-23 15:30:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-07-23 15:30:07,934 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-07-23 15:30:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:07,935 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-07-23 15:30:07,935 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 15:30:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-07-23 15:30:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-23 15:30:07,936 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:07,936 INFO L353 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-07-23 15:30:07,937 INFO L414 AbstractCegarLoop]: === Iteration 17 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:07,937 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-07-23 15:30:07,937 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:08,001 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:08,001 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-07-23 15:30:08,002 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 15:30:08,002 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 15:30:08,003 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:30:08,003 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 19 states. [2018-07-23 15:30:08,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:08,019 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-07-23 15:30:08,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 15:30:08,020 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2018-07-23 15:30:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:08,020 INFO L225 Difference]: With dead ends: 39 [2018-07-23 15:30:08,021 INFO L226 Difference]: Without dead ends: 38 [2018-07-23 15:30:08,021 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 15:30:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-07-23 15:30:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-07-23 15:30:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-07-23 15:30:08,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-07-23 15:30:08,026 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-07-23 15:30:08,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:08,027 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-07-23 15:30:08,027 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 15:30:08,027 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-07-23 15:30:08,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-23 15:30:08,028 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:08,028 INFO L353 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-07-23 15:30:08,028 INFO L414 AbstractCegarLoop]: === Iteration 18 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:08,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-07-23 15:30:08,029 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:08,094 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:08,094 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-07-23 15:30:08,095 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 15:30:08,095 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 15:30:08,095 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:30:08,096 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 20 states. [2018-07-23 15:30:08,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:08,115 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-07-23 15:30:08,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 15:30:08,115 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2018-07-23 15:30:08,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:08,116 INFO L225 Difference]: With dead ends: 41 [2018-07-23 15:30:08,116 INFO L226 Difference]: Without dead ends: 40 [2018-07-23 15:30:08,117 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 15:30:08,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-07-23 15:30:08,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-07-23 15:30:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-23 15:30:08,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-07-23 15:30:08,129 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-07-23 15:30:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:08,130 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-07-23 15:30:08,130 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 15:30:08,132 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-07-23 15:30:08,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-23 15:30:08,133 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:08,133 INFO L353 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-07-23 15:30:08,134 INFO L414 AbstractCegarLoop]: === Iteration 19 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:08,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-07-23 15:30:08,134 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:08,217 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:08,217 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-07-23 15:30:08,217 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 15:30:08,218 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 15:30:08,218 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:30:08,219 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 21 states. [2018-07-23 15:30:08,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:08,243 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-07-23 15:30:08,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 15:30:08,243 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2018-07-23 15:30:08,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:08,244 INFO L225 Difference]: With dead ends: 43 [2018-07-23 15:30:08,244 INFO L226 Difference]: Without dead ends: 42 [2018-07-23 15:30:08,245 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 15:30:08,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-23 15:30:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-07-23 15:30:08,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-07-23 15:30:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-07-23 15:30:08,253 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-07-23 15:30:08,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:08,253 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-07-23 15:30:08,254 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 15:30:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-07-23 15:30:08,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-07-23 15:30:08,254 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:08,255 INFO L353 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-07-23 15:30:08,256 INFO L414 AbstractCegarLoop]: === Iteration 20 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:08,256 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-07-23 15:30:08,256 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:08,346 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:08,346 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-07-23 15:30:08,347 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 15:30:08,347 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 15:30:08,348 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:30:08,348 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 22 states. [2018-07-23 15:30:08,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:08,375 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-07-23 15:30:08,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 15:30:08,375 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 41 [2018-07-23 15:30:08,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:08,376 INFO L225 Difference]: With dead ends: 45 [2018-07-23 15:30:08,376 INFO L226 Difference]: Without dead ends: 44 [2018-07-23 15:30:08,377 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 15:30:08,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-07-23 15:30:08,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-07-23 15:30:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-23 15:30:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-07-23 15:30:08,386 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-07-23 15:30:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:08,387 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-07-23 15:30:08,387 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 15:30:08,387 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-07-23 15:30:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-23 15:30:08,388 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:08,388 INFO L353 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-07-23 15:30:08,388 INFO L414 AbstractCegarLoop]: === Iteration 21 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:08,390 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-07-23 15:30:08,390 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:08,482 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:08,482 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-07-23 15:30:08,483 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 15:30:08,483 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 15:30:08,483 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:30:08,484 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 23 states. [2018-07-23 15:30:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:08,509 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-07-23 15:30:08,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 15:30:08,510 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2018-07-23 15:30:08,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:08,510 INFO L225 Difference]: With dead ends: 47 [2018-07-23 15:30:08,510 INFO L226 Difference]: Without dead ends: 46 [2018-07-23 15:30:08,511 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 15:30:08,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-07-23 15:30:08,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-07-23 15:30:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-07-23 15:30:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-07-23 15:30:08,519 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-07-23 15:30:08,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:08,519 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-07-23 15:30:08,519 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 15:30:08,520 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-07-23 15:30:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-07-23 15:30:08,520 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:08,521 INFO L353 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-07-23 15:30:08,521 INFO L414 AbstractCegarLoop]: === Iteration 22 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:08,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-07-23 15:30:08,521 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:08,625 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:08,625 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-07-23 15:30:08,625 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 15:30:08,626 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 15:30:08,626 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:30:08,627 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 24 states. [2018-07-23 15:30:08,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:08,646 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-07-23 15:30:08,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 15:30:08,646 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2018-07-23 15:30:08,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:08,647 INFO L225 Difference]: With dead ends: 49 [2018-07-23 15:30:08,647 INFO L226 Difference]: Without dead ends: 48 [2018-07-23 15:30:08,648 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 15:30:08,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-07-23 15:30:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-07-23 15:30:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-07-23 15:30:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-07-23 15:30:08,658 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-07-23 15:30:08,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:08,658 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-07-23 15:30:08,658 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 15:30:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-07-23 15:30:08,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-07-23 15:30:08,659 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:08,660 INFO L353 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-07-23 15:30:08,660 INFO L414 AbstractCegarLoop]: === Iteration 23 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:08,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-07-23 15:30:08,660 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:08,771 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:08,771 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-07-23 15:30:08,771 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 15:30:08,772 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 15:30:08,772 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:30:08,772 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 25 states. [2018-07-23 15:30:08,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:08,799 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-07-23 15:30:08,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-23 15:30:08,799 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 47 [2018-07-23 15:30:08,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:08,800 INFO L225 Difference]: With dead ends: 51 [2018-07-23 15:30:08,800 INFO L226 Difference]: Without dead ends: 50 [2018-07-23 15:30:08,803 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 15:30:08,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-07-23 15:30:08,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-07-23 15:30:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-07-23 15:30:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-07-23 15:30:08,816 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-07-23 15:30:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:08,817 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-07-23 15:30:08,817 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 15:30:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-07-23 15:30:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-07-23 15:30:08,818 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:08,818 INFO L353 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-07-23 15:30:08,818 INFO L414 AbstractCegarLoop]: === Iteration 24 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:08,819 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-07-23 15:30:08,819 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:08,935 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:08,936 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-07-23 15:30:08,936 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 15:30:08,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 15:30:08,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:30:08,938 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 26 states. [2018-07-23 15:30:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:08,970 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-07-23 15:30:08,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 15:30:08,970 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 49 [2018-07-23 15:30:08,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:08,971 INFO L225 Difference]: With dead ends: 53 [2018-07-23 15:30:08,971 INFO L226 Difference]: Without dead ends: 52 [2018-07-23 15:30:08,972 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:30:08,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-07-23 15:30:08,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-07-23 15:30:08,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-07-23 15:30:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-07-23 15:30:08,983 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-07-23 15:30:08,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:08,984 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-07-23 15:30:08,984 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 15:30:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-07-23 15:30:08,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-07-23 15:30:08,986 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:08,986 INFO L353 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-07-23 15:30:08,987 INFO L414 AbstractCegarLoop]: === Iteration 25 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:08,989 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-07-23 15:30:08,990 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:09,122 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:09,123 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-07-23 15:30:09,123 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 15:30:09,123 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 15:30:09,124 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:30:09,124 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 27 states. [2018-07-23 15:30:09,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:09,144 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-07-23 15:30:09,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 15:30:09,145 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2018-07-23 15:30:09,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:09,145 INFO L225 Difference]: With dead ends: 55 [2018-07-23 15:30:09,146 INFO L226 Difference]: Without dead ends: 54 [2018-07-23 15:30:09,146 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 15:30:09,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-07-23 15:30:09,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-07-23 15:30:09,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-07-23 15:30:09,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-07-23 15:30:09,151 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-07-23 15:30:09,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:09,151 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-07-23 15:30:09,151 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 15:30:09,152 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-07-23 15:30:09,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-07-23 15:30:09,152 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:09,153 INFO L353 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-07-23 15:30:09,153 INFO L414 AbstractCegarLoop]: === Iteration 26 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:09,153 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-07-23 15:30:09,153 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:09,275 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:09,276 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-07-23 15:30:09,276 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 15:30:09,277 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 15:30:09,278 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:30:09,279 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 28 states. [2018-07-23 15:30:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:09,302 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-07-23 15:30:09,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 15:30:09,302 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 53 [2018-07-23 15:30:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:09,303 INFO L225 Difference]: With dead ends: 57 [2018-07-23 15:30:09,303 INFO L226 Difference]: Without dead ends: 56 [2018-07-23 15:30:09,304 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 15:30:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-07-23 15:30:09,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-07-23 15:30:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-07-23 15:30:09,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-07-23 15:30:09,317 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-07-23 15:30:09,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:09,317 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-07-23 15:30:09,318 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 15:30:09,318 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-07-23 15:30:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-23 15:30:09,318 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:09,319 INFO L353 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-07-23 15:30:09,319 INFO L414 AbstractCegarLoop]: === Iteration 27 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:09,319 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-07-23 15:30:09,319 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:09,452 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:09,452 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-07-23 15:30:09,452 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 15:30:09,453 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 15:30:09,453 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:30:09,454 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 29 states. [2018-07-23 15:30:09,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:09,474 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-07-23 15:30:09,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 15:30:09,474 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 55 [2018-07-23 15:30:09,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:09,475 INFO L225 Difference]: With dead ends: 59 [2018-07-23 15:30:09,475 INFO L226 Difference]: Without dead ends: 58 [2018-07-23 15:30:09,476 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 15:30:09,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-07-23 15:30:09,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-07-23 15:30:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-07-23 15:30:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-07-23 15:30:09,481 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-07-23 15:30:09,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:09,481 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-07-23 15:30:09,481 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 15:30:09,481 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-07-23 15:30:09,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-07-23 15:30:09,482 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:09,482 INFO L353 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-07-23 15:30:09,482 INFO L414 AbstractCegarLoop]: === Iteration 28 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:09,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-07-23 15:30:09,483 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:09,619 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:09,619 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-07-23 15:30:09,620 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 15:30:09,620 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 15:30:09,621 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:30:09,621 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 30 states. [2018-07-23 15:30:09,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:09,647 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-07-23 15:30:09,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 15:30:09,647 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 57 [2018-07-23 15:30:09,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:09,648 INFO L225 Difference]: With dead ends: 61 [2018-07-23 15:30:09,648 INFO L226 Difference]: Without dead ends: 60 [2018-07-23 15:30:09,649 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 15:30:09,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-07-23 15:30:09,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-07-23 15:30:09,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-07-23 15:30:09,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-07-23 15:30:09,654 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-07-23 15:30:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:09,654 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-07-23 15:30:09,654 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 15:30:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-07-23 15:30:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-07-23 15:30:09,655 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:09,655 INFO L353 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-07-23 15:30:09,656 INFO L414 AbstractCegarLoop]: === Iteration 29 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:09,656 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-07-23 15:30:09,656 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:09,810 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:09,810 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-07-23 15:30:09,811 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 15:30:09,811 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 15:30:09,812 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:30:09,812 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 31 states. [2018-07-23 15:30:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:09,839 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-07-23 15:30:09,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 15:30:09,840 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 59 [2018-07-23 15:30:09,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:09,841 INFO L225 Difference]: With dead ends: 63 [2018-07-23 15:30:09,841 INFO L226 Difference]: Without dead ends: 62 [2018-07-23 15:30:09,842 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 15:30:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-07-23 15:30:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-07-23 15:30:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-07-23 15:30:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-07-23 15:30:09,847 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-07-23 15:30:09,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:09,848 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-07-23 15:30:09,848 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 15:30:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-07-23 15:30:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-07-23 15:30:09,848 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:09,849 INFO L353 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-07-23 15:30:09,849 INFO L414 AbstractCegarLoop]: === Iteration 30 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:09,849 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-07-23 15:30:09,849 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:10,044 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:10,045 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-07-23 15:30:10,045 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 15:30:10,045 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 15:30:10,046 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:30:10,046 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 32 states. [2018-07-23 15:30:10,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:10,073 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-07-23 15:30:10,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 15:30:10,073 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 61 [2018-07-23 15:30:10,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:10,074 INFO L225 Difference]: With dead ends: 65 [2018-07-23 15:30:10,074 INFO L226 Difference]: Without dead ends: 64 [2018-07-23 15:30:10,075 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 15:30:10,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-07-23 15:30:10,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-07-23 15:30:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-07-23 15:30:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-07-23 15:30:10,079 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-07-23 15:30:10,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:10,079 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-07-23 15:30:10,079 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 15:30:10,079 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-07-23 15:30:10,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-07-23 15:30:10,080 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:10,080 INFO L353 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-07-23 15:30:10,080 INFO L414 AbstractCegarLoop]: === Iteration 31 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:10,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-07-23 15:30:10,081 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:10,215 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:10,215 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-07-23 15:30:10,216 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 15:30:10,216 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 15:30:10,217 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:30:10,217 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 33 states. [2018-07-23 15:30:10,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:10,241 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-07-23 15:30:10,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-23 15:30:10,241 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 63 [2018-07-23 15:30:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:10,242 INFO L225 Difference]: With dead ends: 67 [2018-07-23 15:30:10,242 INFO L226 Difference]: Without dead ends: 66 [2018-07-23 15:30:10,243 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 15:30:10,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-07-23 15:30:10,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-07-23 15:30:10,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-07-23 15:30:10,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-07-23 15:30:10,247 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-07-23 15:30:10,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:10,247 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-07-23 15:30:10,247 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 15:30:10,248 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-07-23 15:30:10,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-07-23 15:30:10,248 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:10,248 INFO L353 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-07-23 15:30:10,248 INFO L414 AbstractCegarLoop]: === Iteration 32 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:10,249 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-07-23 15:30:10,249 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:10,383 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:10,383 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-07-23 15:30:10,384 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 15:30:10,384 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 15:30:10,385 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:30:10,385 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 34 states. [2018-07-23 15:30:10,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:10,408 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-07-23 15:30:10,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 15:30:10,408 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 65 [2018-07-23 15:30:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:10,409 INFO L225 Difference]: With dead ends: 69 [2018-07-23 15:30:10,409 INFO L226 Difference]: Without dead ends: 68 [2018-07-23 15:30:10,410 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 15:30:10,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-07-23 15:30:10,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-07-23 15:30:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-07-23 15:30:10,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-07-23 15:30:10,414 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-07-23 15:30:10,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:10,415 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-07-23 15:30:10,415 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 15:30:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-07-23 15:30:10,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-07-23 15:30:10,416 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:10,416 INFO L353 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-07-23 15:30:10,416 INFO L414 AbstractCegarLoop]: === Iteration 33 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:10,416 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-07-23 15:30:10,417 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:10,562 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:10,562 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-07-23 15:30:10,562 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 15:30:10,563 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 15:30:10,566 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:30:10,566 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 35 states. [2018-07-23 15:30:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:10,594 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-07-23 15:30:10,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 15:30:10,594 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2018-07-23 15:30:10,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:10,595 INFO L225 Difference]: With dead ends: 71 [2018-07-23 15:30:10,595 INFO L226 Difference]: Without dead ends: 70 [2018-07-23 15:30:10,596 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 15:30:10,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-07-23 15:30:10,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-07-23 15:30:10,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-07-23 15:30:10,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-07-23 15:30:10,601 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-07-23 15:30:10,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:10,602 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-07-23 15:30:10,602 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 15:30:10,602 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-07-23 15:30:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-07-23 15:30:10,603 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:10,604 INFO L353 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-07-23 15:30:10,604 INFO L414 AbstractCegarLoop]: === Iteration 34 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:10,604 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-07-23 15:30:10,605 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:10,751 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:10,751 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-07-23 15:30:10,752 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 15:30:10,752 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 15:30:10,753 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:30:10,753 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 36 states. [2018-07-23 15:30:10,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:10,782 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-07-23 15:30:10,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 15:30:10,782 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 69 [2018-07-23 15:30:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:10,783 INFO L225 Difference]: With dead ends: 73 [2018-07-23 15:30:10,783 INFO L226 Difference]: Without dead ends: 72 [2018-07-23 15:30:10,784 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 15:30:10,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-07-23 15:30:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-07-23 15:30:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-07-23 15:30:10,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-07-23 15:30:10,788 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-07-23 15:30:10,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:10,788 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-07-23 15:30:10,788 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 15:30:10,788 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-07-23 15:30:10,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-07-23 15:30:10,789 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:10,789 INFO L353 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-07-23 15:30:10,789 INFO L414 AbstractCegarLoop]: === Iteration 35 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:10,789 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-07-23 15:30:10,789 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:10,931 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:10,931 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-07-23 15:30:10,931 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 15:30:10,932 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 15:30:10,933 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:30:10,933 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 37 states. [2018-07-23 15:30:10,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:10,959 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-07-23 15:30:10,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-23 15:30:10,959 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 71 [2018-07-23 15:30:10,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:10,960 INFO L225 Difference]: With dead ends: 75 [2018-07-23 15:30:10,960 INFO L226 Difference]: Without dead ends: 74 [2018-07-23 15:30:10,961 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:30:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-07-23 15:30:10,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-07-23 15:30:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-07-23 15:30:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-07-23 15:30:10,964 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-07-23 15:30:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:10,965 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-07-23 15:30:10,965 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 15:30:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-07-23 15:30:10,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-07-23 15:30:10,965 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:10,966 INFO L353 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-07-23 15:30:10,966 INFO L414 AbstractCegarLoop]: === Iteration 36 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:10,966 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-07-23 15:30:10,966 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:11,115 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:11,115 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-07-23 15:30:11,116 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 15:30:11,116 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 15:30:11,117 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:30:11,117 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 38 states. [2018-07-23 15:30:11,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:11,141 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-07-23 15:30:11,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 15:30:11,141 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 73 [2018-07-23 15:30:11,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:11,142 INFO L225 Difference]: With dead ends: 77 [2018-07-23 15:30:11,142 INFO L226 Difference]: Without dead ends: 76 [2018-07-23 15:30:11,143 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 15:30:11,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-07-23 15:30:11,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-07-23 15:30:11,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-07-23 15:30:11,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-07-23 15:30:11,147 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-07-23 15:30:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:11,147 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-07-23 15:30:11,147 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 15:30:11,147 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-07-23 15:30:11,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-07-23 15:30:11,148 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:11,148 INFO L353 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-07-23 15:30:11,148 INFO L414 AbstractCegarLoop]: === Iteration 37 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:11,149 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-07-23 15:30:11,149 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:11,296 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:11,296 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-07-23 15:30:11,296 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 15:30:11,297 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 15:30:11,299 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:30:11,299 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 39 states. [2018-07-23 15:30:11,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:11,329 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-07-23 15:30:11,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 15:30:11,329 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 75 [2018-07-23 15:30:11,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:11,330 INFO L225 Difference]: With dead ends: 79 [2018-07-23 15:30:11,330 INFO L226 Difference]: Without dead ends: 78 [2018-07-23 15:30:11,331 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 15:30:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-07-23 15:30:11,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-07-23 15:30:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-07-23 15:30:11,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-07-23 15:30:11,335 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-07-23 15:30:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:11,335 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-07-23 15:30:11,335 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 15:30:11,336 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-07-23 15:30:11,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-07-23 15:30:11,338 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:11,338 INFO L353 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-07-23 15:30:11,338 INFO L414 AbstractCegarLoop]: === Iteration 38 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:11,338 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-07-23 15:30:11,338 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:11,485 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:11,485 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-07-23 15:30:11,485 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 15:30:11,485 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 15:30:11,486 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:30:11,487 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 40 states. [2018-07-23 15:30:11,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:11,512 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-07-23 15:30:11,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 15:30:11,512 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 77 [2018-07-23 15:30:11,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:11,513 INFO L225 Difference]: With dead ends: 81 [2018-07-23 15:30:11,513 INFO L226 Difference]: Without dead ends: 80 [2018-07-23 15:30:11,514 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 15:30:11,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-07-23 15:30:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-07-23 15:30:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 15:30:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-07-23 15:30:11,520 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-07-23 15:30:11,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:11,520 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-07-23 15:30:11,520 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 15:30:11,520 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-07-23 15:30:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-07-23 15:30:11,521 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:11,521 INFO L353 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-07-23 15:30:11,521 INFO L414 AbstractCegarLoop]: === Iteration 39 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:11,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-07-23 15:30:11,521 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:11,673 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:11,673 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-07-23 15:30:11,674 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 15:30:11,674 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 15:30:11,675 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:30:11,675 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 41 states. [2018-07-23 15:30:11,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:11,706 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-07-23 15:30:11,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 15:30:11,706 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 79 [2018-07-23 15:30:11,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:11,707 INFO L225 Difference]: With dead ends: 83 [2018-07-23 15:30:11,707 INFO L226 Difference]: Without dead ends: 82 [2018-07-23 15:30:11,708 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 15:30:11,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-07-23 15:30:11,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-07-23 15:30:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-07-23 15:30:11,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-07-23 15:30:11,712 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-07-23 15:30:11,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:11,712 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-07-23 15:30:11,712 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 15:30:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-07-23 15:30:11,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-07-23 15:30:11,713 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:11,713 INFO L353 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-07-23 15:30:11,713 INFO L414 AbstractCegarLoop]: === Iteration 40 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:11,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-07-23 15:30:11,714 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:11,879 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:11,879 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-07-23 15:30:11,879 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 15:30:11,880 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 15:30:11,881 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:30:11,881 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 42 states. [2018-07-23 15:30:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:11,918 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-07-23 15:30:11,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 15:30:11,918 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 81 [2018-07-23 15:30:11,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:11,919 INFO L225 Difference]: With dead ends: 85 [2018-07-23 15:30:11,919 INFO L226 Difference]: Without dead ends: 84 [2018-07-23 15:30:11,921 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 15:30:11,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-07-23 15:30:11,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-07-23 15:30:11,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-07-23 15:30:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-07-23 15:30:11,925 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-07-23 15:30:11,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:11,926 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-07-23 15:30:11,926 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 15:30:11,926 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-07-23 15:30:11,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-07-23 15:30:11,927 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:11,927 INFO L353 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-07-23 15:30:11,927 INFO L414 AbstractCegarLoop]: === Iteration 41 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:11,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-07-23 15:30:11,928 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 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 [41] total 41 [2018-07-23 15:30:12,132 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 15:30:12,132 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 15:30:12,133 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:30:12,134 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 43 states. [2018-07-23 15:30:12,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:12,173 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-07-23 15:30:12,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 15:30:12,173 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 83 [2018-07-23 15:30:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:12,174 INFO L225 Difference]: With dead ends: 87 [2018-07-23 15:30:12,175 INFO L226 Difference]: Without dead ends: 86 [2018-07-23 15:30:12,176 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 15:30:12,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-07-23 15:30:12,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-07-23 15:30:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-07-23 15:30:12,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-07-23 15:30:12,181 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-07-23 15:30:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:12,181 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-07-23 15:30:12,182 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 15:30:12,182 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-07-23 15:30:12,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-07-23 15:30:12,183 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:12,183 INFO L353 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-07-23 15:30:12,183 INFO L414 AbstractCegarLoop]: === Iteration 42 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:12,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-07-23 15:30:12,184 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:12,407 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:12,407 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-07-23 15:30:12,408 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 15:30:12,408 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 15:30:12,409 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:30:12,410 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 44 states. [2018-07-23 15:30:12,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:12,447 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-07-23 15:30:12,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 15:30:12,447 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 85 [2018-07-23 15:30:12,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:12,448 INFO L225 Difference]: With dead ends: 89 [2018-07-23 15:30:12,448 INFO L226 Difference]: Without dead ends: 88 [2018-07-23 15:30:12,450 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 15:30:12,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-07-23 15:30:12,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-07-23 15:30:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-07-23 15:30:12,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-07-23 15:30:12,454 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-07-23 15:30:12,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:12,454 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-07-23 15:30:12,454 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 15:30:12,454 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-07-23 15:30:12,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-07-23 15:30:12,455 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:12,455 INFO L353 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-07-23 15:30:12,456 INFO L414 AbstractCegarLoop]: === Iteration 43 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:12,456 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-07-23 15:30:12,456 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:12,619 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:12,620 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-07-23 15:30:12,620 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 15:30:12,621 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 15:30:12,621 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:30:12,622 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 45 states. [2018-07-23 15:30:12,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:12,660 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-07-23 15:30:12,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-23 15:30:12,660 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 87 [2018-07-23 15:30:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:12,661 INFO L225 Difference]: With dead ends: 91 [2018-07-23 15:30:12,661 INFO L226 Difference]: Without dead ends: 90 [2018-07-23 15:30:12,663 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 15:30:12,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-07-23 15:30:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-07-23 15:30:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-07-23 15:30:12,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-07-23 15:30:12,668 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-07-23 15:30:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:12,668 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-07-23 15:30:12,668 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 15:30:12,668 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-07-23 15:30:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-07-23 15:30:12,669 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:12,669 INFO L353 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-07-23 15:30:12,669 INFO L414 AbstractCegarLoop]: === Iteration 44 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:12,670 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-07-23 15:30:12,670 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:12,841 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:12,841 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-07-23 15:30:12,842 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 15:30:12,842 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 15:30:12,843 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:30:12,843 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 46 states. [2018-07-23 15:30:12,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:12,875 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-07-23 15:30:12,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 15:30:12,876 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 89 [2018-07-23 15:30:12,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:12,877 INFO L225 Difference]: With dead ends: 93 [2018-07-23 15:30:12,877 INFO L226 Difference]: Without dead ends: 92 [2018-07-23 15:30:12,878 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 15:30:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-07-23 15:30:12,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-07-23 15:30:12,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-07-23 15:30:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-07-23 15:30:12,883 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-07-23 15:30:12,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:12,884 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-07-23 15:30:12,884 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 15:30:12,884 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-07-23 15:30:12,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-07-23 15:30:12,885 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:12,885 INFO L353 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-07-23 15:30:12,885 INFO L414 AbstractCegarLoop]: === Iteration 45 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:12,886 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-07-23 15:30:12,886 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:13,079 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:13,079 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-07-23 15:30:13,080 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 15:30:13,080 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 15:30:13,081 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:30:13,082 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 47 states. [2018-07-23 15:30:13,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:13,125 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-07-23 15:30:13,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 15:30:13,126 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 91 [2018-07-23 15:30:13,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:13,127 INFO L225 Difference]: With dead ends: 95 [2018-07-23 15:30:13,127 INFO L226 Difference]: Without dead ends: 94 [2018-07-23 15:30:13,128 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 15:30:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-07-23 15:30:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-07-23 15:30:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-07-23 15:30:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-07-23 15:30:13,132 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-07-23 15:30:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:13,132 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-07-23 15:30:13,132 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 15:30:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-07-23 15:30:13,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-07-23 15:30:13,133 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:13,133 INFO L353 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-07-23 15:30:13,133 INFO L414 AbstractCegarLoop]: === Iteration 46 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:13,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-07-23 15:30:13,134 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:13,316 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:13,317 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-07-23 15:30:13,317 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 15:30:13,318 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 15:30:13,318 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:30:13,318 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 48 states. [2018-07-23 15:30:13,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:13,358 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-07-23 15:30:13,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 15:30:13,358 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 93 [2018-07-23 15:30:13,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:13,359 INFO L225 Difference]: With dead ends: 97 [2018-07-23 15:30:13,359 INFO L226 Difference]: Without dead ends: 96 [2018-07-23 15:30:13,360 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 15:30:13,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-07-23 15:30:13,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-07-23 15:30:13,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-07-23 15:30:13,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-07-23 15:30:13,365 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-07-23 15:30:13,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:13,365 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-07-23 15:30:13,365 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 15:30:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-07-23 15:30:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-07-23 15:30:13,366 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:13,366 INFO L353 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-07-23 15:30:13,367 INFO L414 AbstractCegarLoop]: === Iteration 47 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:13,367 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-07-23 15:30:13,367 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:13,539 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:13,539 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-07-23 15:30:13,539 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 15:30:13,540 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 15:30:13,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:30:13,541 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 49 states. [2018-07-23 15:30:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:13,572 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-07-23 15:30:13,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 15:30:13,572 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 95 [2018-07-23 15:30:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:13,573 INFO L225 Difference]: With dead ends: 99 [2018-07-23 15:30:13,573 INFO L226 Difference]: Without dead ends: 98 [2018-07-23 15:30:13,574 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 15:30:13,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-07-23 15:30:13,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-07-23 15:30:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 15:30:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-07-23 15:30:13,579 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-07-23 15:30:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:13,579 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-07-23 15:30:13,579 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 15:30:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-07-23 15:30:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-07-23 15:30:13,580 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:13,580 INFO L353 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-07-23 15:30:13,580 INFO L414 AbstractCegarLoop]: === Iteration 48 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:13,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-07-23 15:30:13,581 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:13,761 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:13,761 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-07-23 15:30:13,762 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 15:30:13,762 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 15:30:13,763 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:30:13,763 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 50 states. [2018-07-23 15:30:13,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:13,797 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-07-23 15:30:13,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 15:30:13,798 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 97 [2018-07-23 15:30:13,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:13,799 INFO L225 Difference]: With dead ends: 101 [2018-07-23 15:30:13,799 INFO L226 Difference]: Without dead ends: 100 [2018-07-23 15:30:13,800 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 15:30:13,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-07-23 15:30:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-07-23 15:30:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-07-23 15:30:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-07-23 15:30:13,804 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-07-23 15:30:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:13,804 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-07-23 15:30:13,804 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 15:30:13,805 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-07-23 15:30:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-07-23 15:30:13,806 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:13,806 INFO L353 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-07-23 15:30:13,806 INFO L414 AbstractCegarLoop]: === Iteration 49 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:13,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-07-23 15:30:13,806 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:13,997 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:13,997 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-07-23 15:30:13,997 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 15:30:13,998 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 15:30:13,999 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:30:13,999 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 51 states. [2018-07-23 15:30:14,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:14,039 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-07-23 15:30:14,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-23 15:30:14,039 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 99 [2018-07-23 15:30:14,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:14,040 INFO L225 Difference]: With dead ends: 103 [2018-07-23 15:30:14,040 INFO L226 Difference]: Without dead ends: 102 [2018-07-23 15:30:14,042 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 15:30:14,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-07-23 15:30:14,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-07-23 15:30:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-07-23 15:30:14,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-07-23 15:30:14,047 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-07-23 15:30:14,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:14,047 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-07-23 15:30:14,047 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 15:30:14,047 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-07-23 15:30:14,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-07-23 15:30:14,048 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:14,049 INFO L353 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-07-23 15:30:14,049 INFO L414 AbstractCegarLoop]: === Iteration 50 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:14,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-07-23 15:30:14,049 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:14,257 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:14,257 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-07-23 15:30:14,258 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 15:30:14,258 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 15:30:14,259 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:30:14,259 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 52 states. [2018-07-23 15:30:14,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:14,306 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-07-23 15:30:14,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 15:30:14,307 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 101 [2018-07-23 15:30:14,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:14,308 INFO L225 Difference]: With dead ends: 105 [2018-07-23 15:30:14,308 INFO L226 Difference]: Without dead ends: 104 [2018-07-23 15:30:14,310 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 15:30:14,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-07-23 15:30:14,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-07-23 15:30:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-07-23 15:30:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-07-23 15:30:14,316 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-07-23 15:30:14,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:14,316 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-07-23 15:30:14,316 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 15:30:14,316 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-07-23 15:30:14,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-07-23 15:30:14,317 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:14,318 INFO L353 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-07-23 15:30:14,318 INFO L414 AbstractCegarLoop]: === Iteration 51 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:14,318 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-07-23 15:30:14,318 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:14,594 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:14,594 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-07-23 15:30:14,595 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 15:30:14,596 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 15:30:14,596 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:30:14,597 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 53 states. [2018-07-23 15:30:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:14,651 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-07-23 15:30:14,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-23 15:30:14,651 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 103 [2018-07-23 15:30:14,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:14,652 INFO L225 Difference]: With dead ends: 107 [2018-07-23 15:30:14,653 INFO L226 Difference]: Without dead ends: 106 [2018-07-23 15:30:14,654 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 15:30:14,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-07-23 15:30:14,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-07-23 15:30:14,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-07-23 15:30:14,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-07-23 15:30:14,659 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-07-23 15:30:14,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:14,660 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-07-23 15:30:14,660 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 15:30:14,660 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-07-23 15:30:14,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-07-23 15:30:14,661 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:14,661 INFO L353 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-07-23 15:30:14,661 INFO L414 AbstractCegarLoop]: === Iteration 52 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:14,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-07-23 15:30:14,662 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:14,919 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:14,919 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-07-23 15:30:14,920 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 15:30:14,920 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 15:30:14,921 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:30:14,921 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 54 states. [2018-07-23 15:30:14,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:14,965 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-07-23 15:30:14,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 15:30:14,965 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 105 [2018-07-23 15:30:14,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:14,966 INFO L225 Difference]: With dead ends: 109 [2018-07-23 15:30:14,966 INFO L226 Difference]: Without dead ends: 108 [2018-07-23 15:30:14,967 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 15:30:14,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-07-23 15:30:14,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-07-23 15:30:14,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-07-23 15:30:14,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-07-23 15:30:14,972 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-07-23 15:30:14,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:14,972 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-07-23 15:30:14,972 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 15:30:14,972 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-07-23 15:30:14,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-07-23 15:30:14,973 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:14,973 INFO L353 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-07-23 15:30:14,973 INFO L414 AbstractCegarLoop]: === Iteration 53 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:14,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-07-23 15:30:14,974 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:15,178 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:15,178 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-07-23 15:30:15,179 INFO L450 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-23 15:30:15,180 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-23 15:30:15,181 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:30:15,181 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 55 states. [2018-07-23 15:30:15,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:15,240 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-07-23 15:30:15,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-23 15:30:15,241 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 107 [2018-07-23 15:30:15,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:15,242 INFO L225 Difference]: With dead ends: 111 [2018-07-23 15:30:15,242 INFO L226 Difference]: Without dead ends: 110 [2018-07-23 15:30:15,243 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:30:15,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-07-23 15:30:15,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-07-23 15:30:15,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-07-23 15:30:15,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-07-23 15:30:15,248 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-07-23 15:30:15,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:15,248 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-07-23 15:30:15,248 INFO L472 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-23 15:30:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-07-23 15:30:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-07-23 15:30:15,253 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:15,253 INFO L353 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-07-23 15:30:15,253 INFO L414 AbstractCegarLoop]: === Iteration 54 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:15,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-07-23 15:30:15,254 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:15,480 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:15,480 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-07-23 15:30:15,481 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 15:30:15,481 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 15:30:15,482 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:30:15,482 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 56 states. [2018-07-23 15:30:15,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:15,543 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-07-23 15:30:15,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 15:30:15,543 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 109 [2018-07-23 15:30:15,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:15,544 INFO L225 Difference]: With dead ends: 113 [2018-07-23 15:30:15,544 INFO L226 Difference]: Without dead ends: 112 [2018-07-23 15:30:15,545 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:30:15,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-07-23 15:30:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-07-23 15:30:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-07-23 15:30:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-07-23 15:30:15,550 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-07-23 15:30:15,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:15,551 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-07-23 15:30:15,551 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 15:30:15,551 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-07-23 15:30:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-07-23 15:30:15,552 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:15,552 INFO L353 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-07-23 15:30:15,552 INFO L414 AbstractCegarLoop]: === Iteration 55 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:15,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-07-23 15:30:15,553 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:15,785 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:15,785 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-07-23 15:30:15,786 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 15:30:15,786 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 15:30:15,787 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:30:15,788 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 57 states. [2018-07-23 15:30:15,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:15,848 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-07-23 15:30:15,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-23 15:30:15,849 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 111 [2018-07-23 15:30:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:15,850 INFO L225 Difference]: With dead ends: 115 [2018-07-23 15:30:15,850 INFO L226 Difference]: Without dead ends: 114 [2018-07-23 15:30:15,851 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:30:15,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-07-23 15:30:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-07-23 15:30:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-07-23 15:30:15,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-07-23 15:30:15,859 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-07-23 15:30:15,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:15,860 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-07-23 15:30:15,860 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 15:30:15,860 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-07-23 15:30:15,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-07-23 15:30:15,861 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:15,862 INFO L353 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-07-23 15:30:15,862 INFO L414 AbstractCegarLoop]: === Iteration 56 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:15,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-07-23 15:30:15,862 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:16,094 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:16,098 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-07-23 15:30:16,099 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 15:30:16,099 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 15:30:16,100 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:30:16,100 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 58 states. [2018-07-23 15:30:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:16,162 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-07-23 15:30:16,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 15:30:16,162 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 113 [2018-07-23 15:30:16,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:16,164 INFO L225 Difference]: With dead ends: 117 [2018-07-23 15:30:16,164 INFO L226 Difference]: Without dead ends: 116 [2018-07-23 15:30:16,165 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 15:30:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-07-23 15:30:16,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-07-23 15:30:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 15:30:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-07-23 15:30:16,170 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-07-23 15:30:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:16,170 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-07-23 15:30:16,170 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 15:30:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-07-23 15:30:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-07-23 15:30:16,171 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:16,171 INFO L353 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-07-23 15:30:16,172 INFO L414 AbstractCegarLoop]: === Iteration 57 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:16,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-07-23 15:30:16,172 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:16,410 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:16,410 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-07-23 15:30:16,411 INFO L450 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-23 15:30:16,411 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-23 15:30:16,412 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:30:16,412 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 59 states. [2018-07-23 15:30:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:16,476 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-07-23 15:30:16,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 15:30:16,477 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 115 [2018-07-23 15:30:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:16,478 INFO L225 Difference]: With dead ends: 119 [2018-07-23 15:30:16,478 INFO L226 Difference]: Without dead ends: 118 [2018-07-23 15:30:16,479 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 15:30:16,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-07-23 15:30:16,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-07-23 15:30:16,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-07-23 15:30:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-07-23 15:30:16,483 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-07-23 15:30:16,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:16,484 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-07-23 15:30:16,484 INFO L472 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-23 15:30:16,484 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-07-23 15:30:16,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-07-23 15:30:16,485 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:16,485 INFO L353 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-07-23 15:30:16,485 INFO L414 AbstractCegarLoop]: === Iteration 58 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:16,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-07-23 15:30:16,486 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:16,735 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:16,735 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-07-23 15:30:16,735 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-23 15:30:16,736 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-23 15:30:16,737 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:30:16,737 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 60 states. [2018-07-23 15:30:16,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:16,804 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-07-23 15:30:16,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 15:30:16,804 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 117 [2018-07-23 15:30:16,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:16,805 INFO L225 Difference]: With dead ends: 121 [2018-07-23 15:30:16,805 INFO L226 Difference]: Without dead ends: 120 [2018-07-23 15:30:16,807 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 15:30:16,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-07-23 15:30:16,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-07-23 15:30:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-07-23 15:30:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-07-23 15:30:16,814 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-07-23 15:30:16,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:16,814 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-07-23 15:30:16,815 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-23 15:30:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-07-23 15:30:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-07-23 15:30:16,816 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:16,816 INFO L353 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-07-23 15:30:16,816 INFO L414 AbstractCegarLoop]: === Iteration 59 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:16,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-07-23 15:30:16,817 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:17,088 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:17,088 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-07-23 15:30:17,088 INFO L450 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-23 15:30:17,089 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-23 15:30:17,090 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:30:17,090 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 61 states. [2018-07-23 15:30:17,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:17,175 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-07-23 15:30:17,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-23 15:30:17,175 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 119 [2018-07-23 15:30:17,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:17,176 INFO L225 Difference]: With dead ends: 123 [2018-07-23 15:30:17,176 INFO L226 Difference]: Without dead ends: 122 [2018-07-23 15:30:17,178 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 15:30:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-07-23 15:30:17,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-07-23 15:30:17,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-07-23 15:30:17,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-07-23 15:30:17,184 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-07-23 15:30:17,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:17,184 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-07-23 15:30:17,184 INFO L472 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-23 15:30:17,184 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-07-23 15:30:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-07-23 15:30:17,186 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:17,186 INFO L353 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-07-23 15:30:17,186 INFO L414 AbstractCegarLoop]: === Iteration 60 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:17,187 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-07-23 15:30:17,187 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:17,512 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:17,512 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-07-23 15:30:17,513 INFO L450 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-23 15:30:17,514 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-23 15:30:17,515 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:30:17,515 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 62 states. [2018-07-23 15:30:17,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:17,575 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-07-23 15:30:17,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 15:30:17,575 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 121 [2018-07-23 15:30:17,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:17,576 INFO L225 Difference]: With dead ends: 125 [2018-07-23 15:30:17,577 INFO L226 Difference]: Without dead ends: 124 [2018-07-23 15:30:17,578 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:30:17,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-07-23 15:30:17,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-07-23 15:30:17,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-07-23 15:30:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-07-23 15:30:17,583 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-07-23 15:30:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:17,584 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-07-23 15:30:17,584 INFO L472 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-23 15:30:17,584 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-07-23 15:30:17,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-07-23 15:30:17,585 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:17,585 INFO L353 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-07-23 15:30:17,586 INFO L414 AbstractCegarLoop]: === Iteration 61 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:17,586 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-07-23 15:30:17,586 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:17,887 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:17,887 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-07-23 15:30:17,888 INFO L450 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-23 15:30:17,888 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-23 15:30:17,889 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:30:17,890 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 63 states. [2018-07-23 15:30:17,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:17,959 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-07-23 15:30:17,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-23 15:30:17,960 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 123 [2018-07-23 15:30:17,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:17,961 INFO L225 Difference]: With dead ends: 127 [2018-07-23 15:30:17,961 INFO L226 Difference]: Without dead ends: 126 [2018-07-23 15:30:17,963 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 15:30:17,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-07-23 15:30:17,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-07-23 15:30:17,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-07-23 15:30:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-07-23 15:30:17,968 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-07-23 15:30:17,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:17,969 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-07-23 15:30:17,969 INFO L472 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-23 15:30:17,969 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-07-23 15:30:17,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-07-23 15:30:17,970 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:17,970 INFO L353 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-07-23 15:30:17,971 INFO L414 AbstractCegarLoop]: === Iteration 62 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:17,971 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-07-23 15:30:17,971 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:18,213 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:18,213 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-07-23 15:30:18,214 INFO L450 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-23 15:30:18,214 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-23 15:30:18,215 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:30:18,216 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 64 states. [2018-07-23 15:30:18,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:18,268 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-07-23 15:30:18,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 15:30:18,268 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 125 [2018-07-23 15:30:18,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:18,269 INFO L225 Difference]: With dead ends: 129 [2018-07-23 15:30:18,269 INFO L226 Difference]: Without dead ends: 128 [2018-07-23 15:30:18,271 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:30:18,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-07-23 15:30:18,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-07-23 15:30:18,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-07-23 15:30:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-07-23 15:30:18,275 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-07-23 15:30:18,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:18,276 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-07-23 15:30:18,276 INFO L472 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-23 15:30:18,276 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-07-23 15:30:18,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-07-23 15:30:18,277 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:18,277 INFO L353 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-07-23 15:30:18,277 INFO L414 AbstractCegarLoop]: === Iteration 63 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:18,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-07-23 15:30:18,278 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:18,523 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:18,523 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-07-23 15:30:18,524 INFO L450 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-23 15:30:18,524 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-23 15:30:18,525 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:30:18,526 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 65 states. [2018-07-23 15:30:18,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:18,601 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-07-23 15:30:18,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-23 15:30:18,602 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 127 [2018-07-23 15:30:18,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:18,603 INFO L225 Difference]: With dead ends: 131 [2018-07-23 15:30:18,603 INFO L226 Difference]: Without dead ends: 130 [2018-07-23 15:30:18,604 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 15:30:18,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-07-23 15:30:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-07-23 15:30:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-07-23 15:30:18,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-07-23 15:30:18,610 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-07-23 15:30:18,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:18,611 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-07-23 15:30:18,611 INFO L472 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-23 15:30:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-07-23 15:30:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-07-23 15:30:18,612 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:18,612 INFO L353 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-07-23 15:30:18,612 INFO L414 AbstractCegarLoop]: === Iteration 64 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:18,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-07-23 15:30:18,613 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:18,867 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:18,868 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-07-23 15:30:18,868 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-23 15:30:18,869 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-23 15:30:18,870 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:30:18,870 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 66 states. [2018-07-23 15:30:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:18,921 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-07-23 15:30:18,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 15:30:18,921 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 129 [2018-07-23 15:30:18,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:18,922 INFO L225 Difference]: With dead ends: 133 [2018-07-23 15:30:18,923 INFO L226 Difference]: Without dead ends: 132 [2018-07-23 15:30:18,924 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 15:30:18,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-07-23 15:30:18,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-07-23 15:30:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-07-23 15:30:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-07-23 15:30:18,930 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-07-23 15:30:18,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:18,930 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-07-23 15:30:18,930 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-23 15:30:18,930 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-07-23 15:30:18,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-07-23 15:30:18,932 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:18,932 INFO L353 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-07-23 15:30:18,932 INFO L414 AbstractCegarLoop]: === Iteration 65 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:18,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-07-23 15:30:18,933 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:19,190 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:19,190 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-07-23 15:30:19,190 INFO L450 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-23 15:30:19,191 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-23 15:30:19,191 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:30:19,192 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 67 states. [2018-07-23 15:30:19,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:19,267 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-07-23 15:30:19,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-07-23 15:30:19,268 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 131 [2018-07-23 15:30:19,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:19,269 INFO L225 Difference]: With dead ends: 135 [2018-07-23 15:30:19,269 INFO L226 Difference]: Without dead ends: 134 [2018-07-23 15:30:19,270 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 15:30:19,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-07-23 15:30:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-07-23 15:30:19,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-07-23 15:30:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-07-23 15:30:19,275 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-07-23 15:30:19,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:19,276 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-07-23 15:30:19,276 INFO L472 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-23 15:30:19,276 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-07-23 15:30:19,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-07-23 15:30:19,277 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:19,277 INFO L353 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-07-23 15:30:19,277 INFO L414 AbstractCegarLoop]: === Iteration 66 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:19,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-07-23 15:30:19,278 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:19,550 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:19,550 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-07-23 15:30:19,550 INFO L450 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-23 15:30:19,551 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-23 15:30:19,552 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:30:19,552 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 68 states. [2018-07-23 15:30:19,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:19,641 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-07-23 15:30:19,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 15:30:19,641 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 133 [2018-07-23 15:30:19,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:19,642 INFO L225 Difference]: With dead ends: 137 [2018-07-23 15:30:19,642 INFO L226 Difference]: Without dead ends: 136 [2018-07-23 15:30:19,643 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 15:30:19,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-07-23 15:30:19,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-07-23 15:30:19,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-07-23 15:30:19,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-07-23 15:30:19,648 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-07-23 15:30:19,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:19,649 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-07-23 15:30:19,649 INFO L472 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-23 15:30:19,649 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-07-23 15:30:19,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-07-23 15:30:19,650 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:19,650 INFO L353 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-07-23 15:30:19,650 INFO L414 AbstractCegarLoop]: === Iteration 67 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:19,651 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-07-23 15:30:19,651 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:19,922 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:19,922 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-07-23 15:30:19,923 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-23 15:30:19,923 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-23 15:30:19,924 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:30:19,924 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 69 states. [2018-07-23 15:30:20,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:20,004 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-07-23 15:30:20,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-23 15:30:20,005 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 135 [2018-07-23 15:30:20,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:20,006 INFO L225 Difference]: With dead ends: 139 [2018-07-23 15:30:20,006 INFO L226 Difference]: Without dead ends: 138 [2018-07-23 15:30:20,007 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 15:30:20,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-07-23 15:30:20,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-07-23 15:30:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-07-23 15:30:20,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-07-23 15:30:20,012 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-07-23 15:30:20,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:20,012 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-07-23 15:30:20,012 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-23 15:30:20,012 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-07-23 15:30:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-07-23 15:30:20,014 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:20,014 INFO L353 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-07-23 15:30:20,014 INFO L414 AbstractCegarLoop]: === Iteration 68 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:20,014 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-07-23 15:30:20,015 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:20,313 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:20,313 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-07-23 15:30:20,314 INFO L450 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-23 15:30:20,315 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-23 15:30:20,315 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:30:20,315 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 70 states. [2018-07-23 15:30:20,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:20,370 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-07-23 15:30:20,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 15:30:20,370 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 137 [2018-07-23 15:30:20,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:20,372 INFO L225 Difference]: With dead ends: 141 [2018-07-23 15:30:20,372 INFO L226 Difference]: Without dead ends: 140 [2018-07-23 15:30:20,373 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:30:20,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-07-23 15:30:20,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-07-23 15:30:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-07-23 15:30:20,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-07-23 15:30:20,378 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-07-23 15:30:20,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:20,378 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-07-23 15:30:20,379 INFO L472 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-23 15:30:20,379 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-07-23 15:30:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-07-23 15:30:20,380 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:20,380 INFO L353 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-07-23 15:30:20,380 INFO L414 AbstractCegarLoop]: === Iteration 69 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:20,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-07-23 15:30:20,381 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:20,650 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:20,650 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-07-23 15:30:20,650 INFO L450 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-23 15:30:20,651 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-23 15:30:20,652 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:30:20,652 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 71 states. [2018-07-23 15:30:20,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:20,703 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-07-23 15:30:20,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-23 15:30:20,703 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 139 [2018-07-23 15:30:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:20,704 INFO L225 Difference]: With dead ends: 143 [2018-07-23 15:30:20,704 INFO L226 Difference]: Without dead ends: 142 [2018-07-23 15:30:20,705 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:30:20,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-07-23 15:30:20,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-07-23 15:30:20,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-07-23 15:30:20,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-07-23 15:30:20,710 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-07-23 15:30:20,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:20,711 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-07-23 15:30:20,711 INFO L472 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-23 15:30:20,711 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-07-23 15:30:20,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-07-23 15:30:20,714 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:20,714 INFO L353 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-07-23 15:30:20,714 INFO L414 AbstractCegarLoop]: === Iteration 70 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:20,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-07-23 15:30:20,714 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:20,980 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:20,980 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-07-23 15:30:20,980 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 15:30:20,981 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 15:30:20,981 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:30:20,982 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 72 states. [2018-07-23 15:30:21,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:21,033 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-07-23 15:30:21,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 15:30:21,034 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 141 [2018-07-23 15:30:21,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:21,035 INFO L225 Difference]: With dead ends: 145 [2018-07-23 15:30:21,035 INFO L226 Difference]: Without dead ends: 144 [2018-07-23 15:30:21,036 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 15:30:21,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-07-23 15:30:21,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-07-23 15:30:21,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-07-23 15:30:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-07-23 15:30:21,041 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-07-23 15:30:21,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:21,041 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-07-23 15:30:21,041 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 15:30:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-07-23 15:30:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-07-23 15:30:21,043 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:21,043 INFO L353 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-07-23 15:30:21,043 INFO L414 AbstractCegarLoop]: === Iteration 71 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:21,043 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-07-23 15:30:21,044 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:21,323 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:21,323 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-07-23 15:30:21,323 INFO L450 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-23 15:30:21,324 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-23 15:30:21,325 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:30:21,325 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 73 states. [2018-07-23 15:30:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:21,392 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-07-23 15:30:21,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-07-23 15:30:21,393 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 143 [2018-07-23 15:30:21,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:21,394 INFO L225 Difference]: With dead ends: 147 [2018-07-23 15:30:21,394 INFO L226 Difference]: Without dead ends: 146 [2018-07-23 15:30:21,395 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:30:21,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-07-23 15:30:21,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-07-23 15:30:21,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-07-23 15:30:21,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-07-23 15:30:21,400 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-07-23 15:30:21,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:21,400 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-07-23 15:30:21,401 INFO L472 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-23 15:30:21,401 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-07-23 15:30:21,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-07-23 15:30:21,406 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:21,406 INFO L353 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-07-23 15:30:21,406 INFO L414 AbstractCegarLoop]: === Iteration 72 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:21,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-07-23 15:30:21,406 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:21,690 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:21,691 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-07-23 15:30:21,691 INFO L450 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-23 15:30:21,692 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-23 15:30:21,692 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:30:21,693 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 74 states. [2018-07-23 15:30:21,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:21,798 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-07-23 15:30:21,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 15:30:21,798 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 145 [2018-07-23 15:30:21,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:21,799 INFO L225 Difference]: With dead ends: 149 [2018-07-23 15:30:21,800 INFO L226 Difference]: Without dead ends: 148 [2018-07-23 15:30:21,801 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:30:21,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-07-23 15:30:21,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-07-23 15:30:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-07-23 15:30:21,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-07-23 15:30:21,806 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-07-23 15:30:21,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:21,807 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-07-23 15:30:21,807 INFO L472 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-23 15:30:21,807 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-07-23 15:30:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-07-23 15:30:21,808 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:21,809 INFO L353 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-07-23 15:30:21,809 INFO L414 AbstractCegarLoop]: === Iteration 73 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:21,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-07-23 15:30:21,809 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:22,117 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:22,117 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-07-23 15:30:22,118 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-23 15:30:22,119 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-23 15:30:22,120 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:30:22,120 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 75 states. [2018-07-23 15:30:22,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:22,249 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-07-23 15:30:22,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-23 15:30:22,249 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 147 [2018-07-23 15:30:22,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:22,251 INFO L225 Difference]: With dead ends: 151 [2018-07-23 15:30:22,251 INFO L226 Difference]: Without dead ends: 150 [2018-07-23 15:30:22,252 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:30:22,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-07-23 15:30:22,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-07-23 15:30:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-07-23 15:30:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-07-23 15:30:22,257 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-07-23 15:30:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:22,258 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-07-23 15:30:22,258 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-23 15:30:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-07-23 15:30:22,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-07-23 15:30:22,260 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:22,260 INFO L353 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-07-23 15:30:22,260 INFO L414 AbstractCegarLoop]: === Iteration 74 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:22,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-07-23 15:30:22,260 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:22,665 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:22,665 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-07-23 15:30:22,666 INFO L450 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-23 15:30:22,667 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-23 15:30:22,667 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:30:22,668 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 76 states. [2018-07-23 15:30:22,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:22,782 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-07-23 15:30:22,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 15:30:22,783 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 149 [2018-07-23 15:30:22,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:22,784 INFO L225 Difference]: With dead ends: 153 [2018-07-23 15:30:22,784 INFO L226 Difference]: Without dead ends: 152 [2018-07-23 15:30:22,786 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:30:22,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-07-23 15:30:22,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-07-23 15:30:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-07-23 15:30:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-07-23 15:30:22,792 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-07-23 15:30:22,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:22,793 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-07-23 15:30:22,793 INFO L472 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-23 15:30:22,793 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-07-23 15:30:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-07-23 15:30:22,795 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:22,795 INFO L353 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-07-23 15:30:22,795 INFO L414 AbstractCegarLoop]: === Iteration 75 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:22,795 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-07-23 15:30:22,795 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:23,106 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:23,106 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-07-23 15:30:23,107 INFO L450 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-23 15:30:23,108 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-23 15:30:23,108 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:30:23,108 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 77 states. [2018-07-23 15:30:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:23,183 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-07-23 15:30:23,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-07-23 15:30:23,184 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 151 [2018-07-23 15:30:23,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:23,185 INFO L225 Difference]: With dead ends: 155 [2018-07-23 15:30:23,185 INFO L226 Difference]: Without dead ends: 154 [2018-07-23 15:30:23,186 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:30:23,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-07-23 15:30:23,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-07-23 15:30:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-07-23 15:30:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-07-23 15:30:23,193 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-07-23 15:30:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:23,194 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-07-23 15:30:23,194 INFO L472 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-23 15:30:23,194 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-07-23 15:30:23,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-07-23 15:30:23,195 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:23,195 INFO L353 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-07-23 15:30:23,196 INFO L414 AbstractCegarLoop]: === Iteration 76 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:23,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-07-23 15:30:23,196 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:23,471 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:23,471 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-07-23 15:30:23,472 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-23 15:30:23,473 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-23 15:30:23,473 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:30:23,473 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 78 states. [2018-07-23 15:30:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:23,581 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-07-23 15:30:23,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 15:30:23,582 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 153 [2018-07-23 15:30:23,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:23,583 INFO L225 Difference]: With dead ends: 157 [2018-07-23 15:30:23,583 INFO L226 Difference]: Without dead ends: 156 [2018-07-23 15:30:23,584 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:30:23,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-07-23 15:30:23,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-07-23 15:30:23,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-07-23 15:30:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-07-23 15:30:23,589 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-07-23 15:30:23,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:23,590 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-07-23 15:30:23,590 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-23 15:30:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-07-23 15:30:23,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-07-23 15:30:23,591 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:23,591 INFO L353 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-07-23 15:30:23,592 INFO L414 AbstractCegarLoop]: === Iteration 77 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:23,592 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-07-23 15:30:23,592 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:23,876 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:23,876 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-07-23 15:30:23,877 INFO L450 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-23 15:30:23,878 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-23 15:30:23,878 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:30:23,879 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 79 states. [2018-07-23 15:30:23,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:23,949 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-07-23 15:30:23,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-23 15:30:23,949 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 155 [2018-07-23 15:30:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:23,951 INFO L225 Difference]: With dead ends: 159 [2018-07-23 15:30:23,951 INFO L226 Difference]: Without dead ends: 158 [2018-07-23 15:30:23,952 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:30:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-07-23 15:30:23,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-07-23 15:30:23,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-07-23 15:30:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-07-23 15:30:23,960 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-07-23 15:30:23,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:23,961 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-07-23 15:30:23,961 INFO L472 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-23 15:30:23,961 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-07-23 15:30:23,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-07-23 15:30:23,962 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:23,962 INFO L353 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-07-23 15:30:23,962 INFO L414 AbstractCegarLoop]: === Iteration 78 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:23,963 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-07-23 15:30:23,963 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:24,249 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:24,249 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-07-23 15:30:24,250 INFO L450 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-23 15:30:24,251 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-23 15:30:24,252 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:30:24,252 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 80 states. [2018-07-23 15:30:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:24,379 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-07-23 15:30:24,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 15:30:24,380 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 157 [2018-07-23 15:30:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:24,381 INFO L225 Difference]: With dead ends: 161 [2018-07-23 15:30:24,381 INFO L226 Difference]: Without dead ends: 160 [2018-07-23 15:30:24,382 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:30:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-07-23 15:30:24,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-07-23 15:30:24,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-07-23 15:30:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-07-23 15:30:24,390 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-07-23 15:30:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:24,390 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-07-23 15:30:24,390 INFO L472 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-23 15:30:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-07-23 15:30:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-07-23 15:30:24,391 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:24,391 INFO L353 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-07-23 15:30:24,391 INFO L414 AbstractCegarLoop]: === Iteration 79 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:24,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-07-23 15:30:24,392 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:24,696 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:24,696 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-07-23 15:30:24,696 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-23 15:30:24,697 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-23 15:30:24,698 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:30:24,698 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 81 states. [2018-07-23 15:30:24,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:24,820 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-07-23 15:30:24,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-23 15:30:24,820 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 159 [2018-07-23 15:30:24,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:24,821 INFO L225 Difference]: With dead ends: 163 [2018-07-23 15:30:24,822 INFO L226 Difference]: Without dead ends: 162 [2018-07-23 15:30:24,823 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 15:30:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-07-23 15:30:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-07-23 15:30:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-07-23 15:30:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-07-23 15:30:24,827 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-07-23 15:30:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:24,828 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-07-23 15:30:24,828 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-23 15:30:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-07-23 15:30:24,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-07-23 15:30:24,829 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:24,829 INFO L353 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-07-23 15:30:24,829 INFO L414 AbstractCegarLoop]: === Iteration 80 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:24,829 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-07-23 15:30:24,829 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:25,167 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:25,168 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-07-23 15:30:25,168 INFO L450 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-23 15:30:25,168 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-23 15:30:25,169 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:30:25,169 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 82 states. [2018-07-23 15:30:25,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:25,226 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-07-23 15:30:25,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 15:30:25,227 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 161 [2018-07-23 15:30:25,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:25,228 INFO L225 Difference]: With dead ends: 165 [2018-07-23 15:30:25,228 INFO L226 Difference]: Without dead ends: 164 [2018-07-23 15:30:25,229 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 15:30:25,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-07-23 15:30:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-07-23 15:30:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-07-23 15:30:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-07-23 15:30:25,233 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-07-23 15:30:25,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:25,233 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-07-23 15:30:25,233 INFO L472 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-23 15:30:25,233 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-07-23 15:30:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-07-23 15:30:25,234 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:25,234 INFO L353 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-07-23 15:30:25,234 INFO L414 AbstractCegarLoop]: === Iteration 81 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:25,235 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-07-23 15:30:25,235 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:25,539 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:25,539 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-07-23 15:30:25,540 INFO L450 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-07-23 15:30:25,541 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-07-23 15:30:25,541 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:30:25,541 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 83 states. [2018-07-23 15:30:25,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:25,664 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-07-23 15:30:25,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-23 15:30:25,665 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 163 [2018-07-23 15:30:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:25,666 INFO L225 Difference]: With dead ends: 167 [2018-07-23 15:30:25,666 INFO L226 Difference]: Without dead ends: 166 [2018-07-23 15:30:25,667 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 15:30:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-07-23 15:30:25,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-07-23 15:30:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-07-23 15:30:25,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-07-23 15:30:25,672 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2018-07-23 15:30:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:25,672 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-07-23 15:30:25,672 INFO L472 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-07-23 15:30:25,673 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-07-23 15:30:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-07-23 15:30:25,674 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:25,674 INFO L353 BasicCegarLoop]: trace histogram [82, 81, 1, 1] [2018-07-23 15:30:25,674 INFO L414 AbstractCegarLoop]: === Iteration 82 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:25,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1262747198, now seen corresponding path program 81 times [2018-07-23 15:30:25,674 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:25,996 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:25,996 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-07-23 15:30:25,996 INFO L450 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-23 15:30:25,997 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-23 15:30:25,998 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:30:25,998 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 84 states. [2018-07-23 15:30:26,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:26,133 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-07-23 15:30:26,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 15:30:26,133 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 165 [2018-07-23 15:30:26,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:26,135 INFO L225 Difference]: With dead ends: 169 [2018-07-23 15:30:26,135 INFO L226 Difference]: Without dead ends: 168 [2018-07-23 15:30:26,136 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 15:30:26,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-07-23 15:30:26,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-07-23 15:30:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-07-23 15:30:26,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-07-23 15:30:26,140 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 165 [2018-07-23 15:30:26,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:26,141 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-07-23 15:30:26,141 INFO L472 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-23 15:30:26,141 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-07-23 15:30:26,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-07-23 15:30:26,142 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:26,142 INFO L353 BasicCegarLoop]: trace histogram [83, 82, 1, 1] [2018-07-23 15:30:26,142 INFO L414 AbstractCegarLoop]: === Iteration 83 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:26,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1975688580, now seen corresponding path program 82 times [2018-07-23 15:30:26,143 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:26,474 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:26,474 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-07-23 15:30:26,475 INFO L450 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-07-23 15:30:26,476 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-07-23 15:30:26,476 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:30:26,477 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 85 states. [2018-07-23 15:30:26,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:26,641 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-07-23 15:30:26,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-23 15:30:26,641 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 167 [2018-07-23 15:30:26,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:26,643 INFO L225 Difference]: With dead ends: 171 [2018-07-23 15:30:26,643 INFO L226 Difference]: Without dead ends: 170 [2018-07-23 15:30:26,644 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 15:30:26,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-07-23 15:30:26,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-07-23 15:30:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-07-23 15:30:26,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-07-23 15:30:26,649 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 167 [2018-07-23 15:30:26,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:26,649 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-07-23 15:30:26,649 INFO L472 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-07-23 15:30:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-07-23 15:30:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-07-23 15:30:26,650 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:26,650 INFO L353 BasicCegarLoop]: trace histogram [84, 83, 1, 1] [2018-07-23 15:30:26,651 INFO L414 AbstractCegarLoop]: === Iteration 84 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:26,651 INFO L82 PathProgramCache]: Analyzing trace with hash 261181638, now seen corresponding path program 83 times [2018-07-23 15:30:26,651 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:26,988 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:26,988 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-07-23 15:30:26,989 INFO L450 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-23 15:30:26,990 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-23 15:30:26,990 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:30:26,991 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 86 states. [2018-07-23 15:30:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:27,143 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-07-23 15:30:27,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 15:30:27,143 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 169 [2018-07-23 15:30:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:27,144 INFO L225 Difference]: With dead ends: 173 [2018-07-23 15:30:27,144 INFO L226 Difference]: Without dead ends: 172 [2018-07-23 15:30:27,145 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:30:27,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-07-23 15:30:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-07-23 15:30:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-07-23 15:30:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-07-23 15:30:27,151 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 169 [2018-07-23 15:30:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:27,151 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-07-23 15:30:27,151 INFO L472 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-23 15:30:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-07-23 15:30:27,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-07-23 15:30:27,152 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:27,152 INFO L353 BasicCegarLoop]: trace histogram [85, 84, 1, 1] [2018-07-23 15:30:27,153 INFO L414 AbstractCegarLoop]: === Iteration 85 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:27,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1887452040, now seen corresponding path program 84 times [2018-07-23 15:30:27,153 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:27,511 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 15:30:27,512 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:27,512 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-07-23 15:30:27,512 INFO L450 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-23 15:30:27,513 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-23 15:30:27,514 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:30:27,514 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 87 states. [2018-07-23 15:30:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:27,636 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-07-23 15:30:27,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-23 15:30:27,637 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 171 [2018-07-23 15:30:27,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:27,638 INFO L225 Difference]: With dead ends: 175 [2018-07-23 15:30:27,638 INFO L226 Difference]: Without dead ends: 174 [2018-07-23 15:30:27,639 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:30:27,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-07-23 15:30:27,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-07-23 15:30:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-07-23 15:30:27,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-07-23 15:30:27,645 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 171 [2018-07-23 15:30:27,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:27,646 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-07-23 15:30:27,646 INFO L472 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-23 15:30:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-07-23 15:30:27,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-07-23 15:30:27,647 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:27,648 INFO L353 BasicCegarLoop]: trace histogram [86, 85, 1, 1] [2018-07-23 15:30:27,648 INFO L414 AbstractCegarLoop]: === Iteration 86 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:27,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1365212618, now seen corresponding path program 85 times [2018-07-23 15:30:27,648 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:28,053 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:28,053 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-07-23 15:30:28,054 INFO L450 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-23 15:30:28,055 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-23 15:30:28,055 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:30:28,056 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 88 states. [2018-07-23 15:30:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:28,158 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-07-23 15:30:28,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 15:30:28,159 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 173 [2018-07-23 15:30:28,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:28,161 INFO L225 Difference]: With dead ends: 177 [2018-07-23 15:30:28,161 INFO L226 Difference]: Without dead ends: 176 [2018-07-23 15:30:28,162 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:30:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-07-23 15:30:28,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-07-23 15:30:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-07-23 15:30:28,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-07-23 15:30:28,169 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 173 [2018-07-23 15:30:28,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:28,169 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-07-23 15:30:28,169 INFO L472 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-23 15:30:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-07-23 15:30:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-07-23 15:30:28,192 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:28,192 INFO L353 BasicCegarLoop]: trace histogram [87, 86, 1, 1] [2018-07-23 15:30:28,192 INFO L414 AbstractCegarLoop]: === Iteration 87 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:28,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2004301708, now seen corresponding path program 86 times [2018-07-23 15:30:28,193 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:28,533 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:28,533 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-07-23 15:30:28,533 INFO L450 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-07-23 15:30:28,534 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-07-23 15:30:28,535 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:30:28,535 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 89 states. [2018-07-23 15:30:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:28,609 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-07-23 15:30:28,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-07-23 15:30:28,610 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 175 [2018-07-23 15:30:28,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:28,611 INFO L225 Difference]: With dead ends: 179 [2018-07-23 15:30:28,611 INFO L226 Difference]: Without dead ends: 178 [2018-07-23 15:30:28,612 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:30:28,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-07-23 15:30:28,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-07-23 15:30:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-07-23 15:30:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-07-23 15:30:28,616 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 175 [2018-07-23 15:30:28,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:28,617 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-07-23 15:30:28,617 INFO L472 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-07-23 15:30:28,617 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-07-23 15:30:28,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-07-23 15:30:28,618 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:28,618 INFO L353 BasicCegarLoop]: trace histogram [88, 87, 1, 1] [2018-07-23 15:30:28,618 INFO L414 AbstractCegarLoop]: === Iteration 88 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:28,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1988593870, now seen corresponding path program 87 times [2018-07-23 15:30:28,618 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:28,985 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:28,985 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-07-23 15:30:28,985 INFO L450 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-23 15:30:28,986 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-23 15:30:28,987 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:30:28,987 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 90 states. [2018-07-23 15:30:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:29,158 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-07-23 15:30:29,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 15:30:29,159 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 177 [2018-07-23 15:30:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:29,160 INFO L225 Difference]: With dead ends: 181 [2018-07-23 15:30:29,160 INFO L226 Difference]: Without dead ends: 180 [2018-07-23 15:30:29,161 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 15:30:29,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-07-23 15:30:29,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-07-23 15:30:29,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-07-23 15:30:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2018-07-23 15:30:29,166 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 177 [2018-07-23 15:30:29,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:29,166 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2018-07-23 15:30:29,166 INFO L472 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-23 15:30:29,166 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2018-07-23 15:30:29,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-07-23 15:30:29,167 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:29,168 INFO L353 BasicCegarLoop]: trace histogram [89, 88, 1, 1] [2018-07-23 15:30:29,168 INFO L414 AbstractCegarLoop]: === Iteration 89 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:29,168 INFO L82 PathProgramCache]: Analyzing trace with hash -221736560, now seen corresponding path program 88 times [2018-07-23 15:30:29,168 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:29,574 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:29,575 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-07-23 15:30:29,575 INFO L450 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-07-23 15:30:29,576 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-07-23 15:30:29,577 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:30:29,577 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand 91 states. [2018-07-23 15:30:29,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:29,800 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-07-23 15:30:29,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-07-23 15:30:29,801 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 179 [2018-07-23 15:30:29,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:29,802 INFO L225 Difference]: With dead ends: 183 [2018-07-23 15:30:29,802 INFO L226 Difference]: Without dead ends: 182 [2018-07-23 15:30:29,803 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:30:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-07-23 15:30:29,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-07-23 15:30:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-07-23 15:30:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-07-23 15:30:29,808 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 179 [2018-07-23 15:30:29,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:29,809 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-07-23 15:30:29,809 INFO L472 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-07-23 15:30:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-07-23 15:30:29,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-07-23 15:30:29,810 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:29,810 INFO L353 BasicCegarLoop]: trace histogram [90, 89, 1, 1] [2018-07-23 15:30:29,810 INFO L414 AbstractCegarLoop]: === Iteration 90 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:29,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1659531730, now seen corresponding path program 89 times [2018-07-23 15:30:29,811 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:30,244 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:30,244 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2018-07-23 15:30:30,245 INFO L450 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-23 15:30:30,246 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-23 15:30:30,246 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:30:30,247 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 92 states. [2018-07-23 15:30:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:30,316 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-07-23 15:30:30,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 15:30:30,316 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 181 [2018-07-23 15:30:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:30,318 INFO L225 Difference]: With dead ends: 185 [2018-07-23 15:30:30,318 INFO L226 Difference]: Without dead ends: 184 [2018-07-23 15:30:30,319 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 15:30:30,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-07-23 15:30:30,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-07-23 15:30:30,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-07-23 15:30:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-07-23 15:30:30,324 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 181 [2018-07-23 15:30:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:30,325 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-07-23 15:30:30,325 INFO L472 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-23 15:30:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-07-23 15:30:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-07-23 15:30:30,326 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:30,326 INFO L353 BasicCegarLoop]: trace histogram [91, 90, 1, 1] [2018-07-23 15:30:30,326 INFO L414 AbstractCegarLoop]: === Iteration 91 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:30,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1377126804, now seen corresponding path program 90 times [2018-07-23 15:30:30,327 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:30,624 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:30,624 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-07-23 15:30:30,624 INFO L450 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-23 15:30:30,625 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-23 15:30:30,626 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:30:30,626 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 93 states. [2018-07-23 15:30:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:30,769 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-07-23 15:30:30,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-07-23 15:30:30,769 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 183 [2018-07-23 15:30:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:30,770 INFO L225 Difference]: With dead ends: 187 [2018-07-23 15:30:30,770 INFO L226 Difference]: Without dead ends: 186 [2018-07-23 15:30:30,771 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:30:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-07-23 15:30:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-07-23 15:30:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-07-23 15:30:30,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2018-07-23 15:30:30,776 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 183 [2018-07-23 15:30:30,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:30,776 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2018-07-23 15:30:30,776 INFO L472 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-23 15:30:30,777 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2018-07-23 15:30:30,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-07-23 15:30:30,777 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:30,778 INFO L353 BasicCegarLoop]: trace histogram [92, 91, 1, 1] [2018-07-23 15:30:30,778 INFO L414 AbstractCegarLoop]: === Iteration 92 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:30,778 INFO L82 PathProgramCache]: Analyzing trace with hash 568932566, now seen corresponding path program 91 times [2018-07-23 15:30:30,778 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:31,125 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:31,126 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-07-23 15:30:31,126 INFO L450 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-23 15:30:31,127 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-23 15:30:31,127 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:30:31,128 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand 94 states. [2018-07-23 15:30:31,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:31,197 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-07-23 15:30:31,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 15:30:31,197 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 185 [2018-07-23 15:30:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:31,198 INFO L225 Difference]: With dead ends: 189 [2018-07-23 15:30:31,198 INFO L226 Difference]: Without dead ends: 188 [2018-07-23 15:30:31,199 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:30:31,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-07-23 15:30:31,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-07-23 15:30:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-07-23 15:30:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-07-23 15:30:31,203 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 185 [2018-07-23 15:30:31,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:31,204 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-07-23 15:30:31,204 INFO L472 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-23 15:30:31,204 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-07-23 15:30:31,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-07-23 15:30:31,205 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:31,205 INFO L353 BasicCegarLoop]: trace histogram [93, 92, 1, 1] [2018-07-23 15:30:31,205 INFO L414 AbstractCegarLoop]: === Iteration 93 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:31,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1283350424, now seen corresponding path program 92 times [2018-07-23 15:30:31,206 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:31,474 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:31,474 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-07-23 15:30:31,475 INFO L450 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-07-23 15:30:31,476 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-07-23 15:30:31,476 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:30:31,476 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 95 states. [2018-07-23 15:30:31,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:31,601 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-07-23 15:30:31,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-07-23 15:30:31,601 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 187 [2018-07-23 15:30:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:31,602 INFO L225 Difference]: With dead ends: 191 [2018-07-23 15:30:31,602 INFO L226 Difference]: Without dead ends: 190 [2018-07-23 15:30:31,603 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 15:30:31,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-07-23 15:30:31,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-07-23 15:30:31,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-07-23 15:30:31,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2018-07-23 15:30:31,608 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 187 [2018-07-23 15:30:31,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:31,608 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2018-07-23 15:30:31,608 INFO L472 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-07-23 15:30:31,608 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2018-07-23 15:30:31,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-07-23 15:30:31,609 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:31,609 INFO L353 BasicCegarLoop]: trace histogram [94, 93, 1, 1] [2018-07-23 15:30:31,610 INFO L414 AbstractCegarLoop]: === Iteration 94 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:31,610 INFO L82 PathProgramCache]: Analyzing trace with hash 644144602, now seen corresponding path program 93 times [2018-07-23 15:30:31,610 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:31,923 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:31,923 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2018-07-23 15:30:31,924 INFO L450 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-23 15:30:31,924 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-23 15:30:31,925 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:30:31,925 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand 96 states. [2018-07-23 15:30:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:32,062 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-07-23 15:30:32,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-23 15:30:32,062 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 189 [2018-07-23 15:30:32,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:32,063 INFO L225 Difference]: With dead ends: 193 [2018-07-23 15:30:32,063 INFO L226 Difference]: Without dead ends: 192 [2018-07-23 15:30:32,064 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:30:32,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-07-23 15:30:32,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-07-23 15:30:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-07-23 15:30:32,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2018-07-23 15:30:32,068 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 189 [2018-07-23 15:30:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:32,069 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2018-07-23 15:30:32,069 INFO L472 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-23 15:30:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2018-07-23 15:30:32,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-07-23 15:30:32,070 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:32,070 INFO L353 BasicCegarLoop]: trace histogram [95, 94, 1, 1] [2018-07-23 15:30:32,070 INFO L414 AbstractCegarLoop]: === Iteration 95 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:32,070 INFO L82 PathProgramCache]: Analyzing trace with hash 547672988, now seen corresponding path program 94 times [2018-07-23 15:30:32,071 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:32,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:32,448 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:32,448 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-07-23 15:30:32,448 INFO L450 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-07-23 15:30:32,450 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-07-23 15:30:32,450 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:30:32,451 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 97 states. [2018-07-23 15:30:32,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:32,544 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-07-23 15:30:32,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-23 15:30:32,544 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 191 [2018-07-23 15:30:32,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:32,545 INFO L225 Difference]: With dead ends: 195 [2018-07-23 15:30:32,545 INFO L226 Difference]: Without dead ends: 194 [2018-07-23 15:30:32,546 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 15:30:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-07-23 15:30:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-07-23 15:30:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-07-23 15:30:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-07-23 15:30:32,551 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 191 [2018-07-23 15:30:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:32,551 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-07-23 15:30:32,551 INFO L472 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-07-23 15:30:32,551 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-07-23 15:30:32,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-07-23 15:30:32,552 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:32,552 INFO L353 BasicCegarLoop]: trace histogram [96, 95, 1, 1] [2018-07-23 15:30:32,553 INFO L414 AbstractCegarLoop]: === Iteration 96 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:32,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1967234850, now seen corresponding path program 95 times [2018-07-23 15:30:32,553 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:32,820 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:32,820 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-07-23 15:30:32,820 INFO L450 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-07-23 15:30:32,821 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-07-23 15:30:32,822 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:30:32,822 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 98 states. [2018-07-23 15:30:32,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:32,879 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-07-23 15:30:32,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-23 15:30:32,879 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 193 [2018-07-23 15:30:32,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:32,881 INFO L225 Difference]: With dead ends: 197 [2018-07-23 15:30:32,881 INFO L226 Difference]: Without dead ends: 196 [2018-07-23 15:30:32,882 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:30:32,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-07-23 15:30:32,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-07-23 15:30:32,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-07-23 15:30:32,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-07-23 15:30:32,886 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 193 [2018-07-23 15:30:32,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:32,887 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-07-23 15:30:32,887 INFO L472 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-07-23 15:30:32,887 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-07-23 15:30:32,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-07-23 15:30:32,888 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:32,888 INFO L353 BasicCegarLoop]: trace histogram [97, 96, 1, 1] [2018-07-23 15:30:32,888 INFO L414 AbstractCegarLoop]: === Iteration 97 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:32,889 INFO L82 PathProgramCache]: Analyzing trace with hash -727079520, now seen corresponding path program 96 times [2018-07-23 15:30:32,889 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:33,344 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:33,344 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-07-23 15:30:33,344 INFO L450 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-07-23 15:30:33,345 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-07-23 15:30:33,345 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:30:33,345 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 99 states. [2018-07-23 15:30:33,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:33,417 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-07-23 15:30:33,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-07-23 15:30:33,417 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 195 [2018-07-23 15:30:33,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:33,418 INFO L225 Difference]: With dead ends: 199 [2018-07-23 15:30:33,419 INFO L226 Difference]: Without dead ends: 198 [2018-07-23 15:30:33,419 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:30:33,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-07-23 15:30:33,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-07-23 15:30:33,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-07-23 15:30:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-07-23 15:30:33,422 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 195 [2018-07-23 15:30:33,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:33,423 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-07-23 15:30:33,423 INFO L472 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-07-23 15:30:33,423 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-07-23 15:30:33,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-07-23 15:30:33,424 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:33,424 INFO L353 BasicCegarLoop]: trace histogram [98, 97, 1, 1] [2018-07-23 15:30:33,424 INFO L414 AbstractCegarLoop]: === Iteration 98 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:33,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1356251618, now seen corresponding path program 97 times [2018-07-23 15:30:33,424 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:33,679 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:33,679 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2018-07-23 15:30:33,680 INFO L450 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-07-23 15:30:33,681 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-07-23 15:30:33,681 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:30:33,682 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 100 states. [2018-07-23 15:30:33,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:33,759 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-07-23 15:30:33,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-23 15:30:33,759 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 197 [2018-07-23 15:30:33,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:33,760 INFO L225 Difference]: With dead ends: 201 [2018-07-23 15:30:33,760 INFO L226 Difference]: Without dead ends: 200 [2018-07-23 15:30:33,761 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 15:30:33,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-07-23 15:30:33,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-07-23 15:30:33,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-07-23 15:30:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2018-07-23 15:30:33,765 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 197 [2018-07-23 15:30:33,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:33,765 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2018-07-23 15:30:33,765 INFO L472 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-07-23 15:30:33,765 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2018-07-23 15:30:33,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-07-23 15:30:33,766 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:33,766 INFO L353 BasicCegarLoop]: trace histogram [99, 98, 1, 1] [2018-07-23 15:30:33,766 INFO L414 AbstractCegarLoop]: === Iteration 99 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:33,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1982715300, now seen corresponding path program 98 times [2018-07-23 15:30:33,766 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:34,044 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:34,044 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-07-23 15:30:34,045 INFO L450 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-07-23 15:30:34,045 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-07-23 15:30:34,046 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:30:34,046 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 101 states. [2018-07-23 15:30:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:34,180 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-07-23 15:30:34,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-07-23 15:30:34,181 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 199 [2018-07-23 15:30:34,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:34,182 INFO L225 Difference]: With dead ends: 203 [2018-07-23 15:30:34,182 INFO L226 Difference]: Without dead ends: 202 [2018-07-23 15:30:34,183 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 15:30:34,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-07-23 15:30:34,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-07-23 15:30:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-07-23 15:30:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2018-07-23 15:30:34,188 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 199 [2018-07-23 15:30:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:34,188 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2018-07-23 15:30:34,188 INFO L472 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-07-23 15:30:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2018-07-23 15:30:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-07-23 15:30:34,189 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:34,190 INFO L353 BasicCegarLoop]: trace histogram [100, 99, 1, 1] [2018-07-23 15:30:34,190 INFO L414 AbstractCegarLoop]: === Iteration 100 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:34,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1576075034, now seen corresponding path program 99 times [2018-07-23 15:30:34,190 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:34,525 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:34,525 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2018-07-23 15:30:34,525 INFO L450 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-07-23 15:30:34,526 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-07-23 15:30:34,526 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:30:34,527 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 102 states. [2018-07-23 15:30:34,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:34,592 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-07-23 15:30:34,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-23 15:30:34,592 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 201 [2018-07-23 15:30:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:34,594 INFO L225 Difference]: With dead ends: 205 [2018-07-23 15:30:34,594 INFO L226 Difference]: Without dead ends: 204 [2018-07-23 15:30:34,594 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:30:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-07-23 15:30:34,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2018-07-23 15:30:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-07-23 15:30:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2018-07-23 15:30:34,600 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 201 [2018-07-23 15:30:34,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:34,600 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2018-07-23 15:30:34,600 INFO L472 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-07-23 15:30:34,600 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2018-07-23 15:30:34,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-07-23 15:30:34,603 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:34,603 INFO L353 BasicCegarLoop]: trace histogram [101, 100, 1, 1] [2018-07-23 15:30:34,603 INFO L414 AbstractCegarLoop]: === Iteration 101 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:34,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1515348904, now seen corresponding path program 100 times [2018-07-23 15:30:34,604 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:34,929 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:34,929 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2018-07-23 15:30:34,930 INFO L450 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-07-23 15:30:34,931 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-07-23 15:30:34,932 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:30:34,932 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand 103 states. [2018-07-23 15:30:35,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:35,070 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-07-23 15:30:35,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-07-23 15:30:35,070 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 203 [2018-07-23 15:30:35,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:35,071 INFO L225 Difference]: With dead ends: 207 [2018-07-23 15:30:35,072 INFO L226 Difference]: Without dead ends: 206 [2018-07-23 15:30:35,073 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:30:35,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-07-23 15:30:35,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2018-07-23 15:30:35,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-07-23 15:30:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2018-07-23 15:30:35,079 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 203 [2018-07-23 15:30:35,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:35,079 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2018-07-23 15:30:35,079 INFO L472 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-07-23 15:30:35,079 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2018-07-23 15:30:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-07-23 15:30:35,081 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:35,081 INFO L353 BasicCegarLoop]: trace histogram [102, 101, 1, 1] [2018-07-23 15:30:35,081 INFO L414 AbstractCegarLoop]: === Iteration 102 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:35,081 INFO L82 PathProgramCache]: Analyzing trace with hash 256384490, now seen corresponding path program 101 times [2018-07-23 15:30:35,081 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:35,471 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:35,472 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2018-07-23 15:30:35,472 INFO L450 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-07-23 15:30:35,473 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-07-23 15:30:35,473 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:30:35,474 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 104 states. [2018-07-23 15:30:35,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:35,664 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-07-23 15:30:35,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-07-23 15:30:35,665 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 205 [2018-07-23 15:30:35,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:35,666 INFO L225 Difference]: With dead ends: 209 [2018-07-23 15:30:35,666 INFO L226 Difference]: Without dead ends: 208 [2018-07-23 15:30:35,666 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:30:35,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-07-23 15:30:35,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-07-23 15:30:35,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-07-23 15:30:35,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-07-23 15:30:35,671 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 205 [2018-07-23 15:30:35,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:35,671 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-07-23 15:30:35,671 INFO L472 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-07-23 15:30:35,671 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-07-23 15:30:35,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-07-23 15:30:35,672 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:35,672 INFO L353 BasicCegarLoop]: trace histogram [103, 102, 1, 1] [2018-07-23 15:30:35,672 INFO L414 AbstractCegarLoop]: === Iteration 103 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:35,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1572360108, now seen corresponding path program 102 times [2018-07-23 15:30:35,672 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:35,990 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:35,990 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2018-07-23 15:30:35,990 INFO L450 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-07-23 15:30:35,992 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-07-23 15:30:35,992 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:30:35,993 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 105 states. [2018-07-23 15:30:36,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:36,095 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-07-23 15:30:36,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-07-23 15:30:36,096 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 207 [2018-07-23 15:30:36,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:36,096 INFO L225 Difference]: With dead ends: 211 [2018-07-23 15:30:36,096 INFO L226 Difference]: Without dead ends: 210 [2018-07-23 15:30:36,097 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:30:36,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-07-23 15:30:36,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-07-23 15:30:36,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-07-23 15:30:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2018-07-23 15:30:36,102 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 207 [2018-07-23 15:30:36,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:36,102 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2018-07-23 15:30:36,103 INFO L472 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-07-23 15:30:36,103 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2018-07-23 15:30:36,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-07-23 15:30:36,104 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:36,104 INFO L353 BasicCegarLoop]: trace histogram [104, 103, 1, 1] [2018-07-23 15:30:36,104 INFO L414 AbstractCegarLoop]: === Iteration 104 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:36,104 INFO L82 PathProgramCache]: Analyzing trace with hash -790423314, now seen corresponding path program 103 times [2018-07-23 15:30:36,104 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:36,449 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:36,449 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2018-07-23 15:30:36,450 INFO L450 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-07-23 15:30:36,451 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-07-23 15:30:36,451 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:30:36,452 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand 106 states. [2018-07-23 15:30:36,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:36,615 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-07-23 15:30:36,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-07-23 15:30:36,615 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 209 [2018-07-23 15:30:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:36,616 INFO L225 Difference]: With dead ends: 213 [2018-07-23 15:30:36,616 INFO L226 Difference]: Without dead ends: 212 [2018-07-23 15:30:36,617 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:30:36,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-07-23 15:30:36,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-07-23 15:30:36,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-07-23 15:30:36,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2018-07-23 15:30:36,622 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 209 [2018-07-23 15:30:36,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:36,622 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2018-07-23 15:30:36,622 INFO L472 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-07-23 15:30:36,622 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2018-07-23 15:30:36,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-07-23 15:30:36,623 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:36,623 INFO L353 BasicCegarLoop]: trace histogram [105, 104, 1, 1] [2018-07-23 15:30:36,624 INFO L414 AbstractCegarLoop]: === Iteration 105 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:36,624 INFO L82 PathProgramCache]: Analyzing trace with hash 612407728, now seen corresponding path program 104 times [2018-07-23 15:30:36,624 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:36,973 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:36,973 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2018-07-23 15:30:36,974 INFO L450 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-07-23 15:30:36,975 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-07-23 15:30:36,976 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:30:36,976 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 107 states. [2018-07-23 15:30:37,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:37,167 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-07-23 15:30:37,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-07-23 15:30:37,168 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 211 [2018-07-23 15:30:37,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:37,168 INFO L225 Difference]: With dead ends: 215 [2018-07-23 15:30:37,168 INFO L226 Difference]: Without dead ends: 214 [2018-07-23 15:30:37,169 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:30:37,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-07-23 15:30:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-07-23 15:30:37,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-07-23 15:30:37,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2018-07-23 15:30:37,174 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 211 [2018-07-23 15:30:37,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:37,174 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2018-07-23 15:30:37,174 INFO L472 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-07-23 15:30:37,174 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2018-07-23 15:30:37,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-07-23 15:30:37,175 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:37,175 INFO L353 BasicCegarLoop]: trace histogram [106, 105, 1, 1] [2018-07-23 15:30:37,175 INFO L414 AbstractCegarLoop]: === Iteration 106 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:37,176 INFO L82 PathProgramCache]: Analyzing trace with hash 113308146, now seen corresponding path program 105 times [2018-07-23 15:30:37,176 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:37,516 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:37,516 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2018-07-23 15:30:37,517 INFO L450 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-07-23 15:30:37,518 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-07-23 15:30:37,519 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:30:37,519 INFO L87 Difference]: Start difference. First operand 214 states and 214 transitions. Second operand 108 states. [2018-07-23 15:30:37,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:37,690 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-07-23 15:30:37,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-07-23 15:30:37,690 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 213 [2018-07-23 15:30:37,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:37,691 INFO L225 Difference]: With dead ends: 217 [2018-07-23 15:30:37,691 INFO L226 Difference]: Without dead ends: 216 [2018-07-23 15:30:37,693 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:30:37,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-07-23 15:30:37,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-07-23 15:30:37,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-07-23 15:30:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 216 transitions. [2018-07-23 15:30:37,697 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 216 transitions. Word has length 213 [2018-07-23 15:30:37,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:37,698 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 216 transitions. [2018-07-23 15:30:37,698 INFO L472 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-07-23 15:30:37,698 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 216 transitions. [2018-07-23 15:30:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-07-23 15:30:37,699 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:37,699 INFO L353 BasicCegarLoop]: trace histogram [107, 106, 1, 1] [2018-07-23 15:30:37,699 INFO L414 AbstractCegarLoop]: === Iteration 107 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:37,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1514946996, now seen corresponding path program 106 times [2018-07-23 15:30:37,700 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:38,234 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:38,234 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2018-07-23 15:30:38,235 INFO L450 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-07-23 15:30:38,235 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-07-23 15:30:38,236 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:30:38,236 INFO L87 Difference]: Start difference. First operand 216 states and 216 transitions. Second operand 109 states. [2018-07-23 15:30:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:38,335 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-07-23 15:30:38,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-07-23 15:30:38,336 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 215 [2018-07-23 15:30:38,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:38,336 INFO L225 Difference]: With dead ends: 219 [2018-07-23 15:30:38,337 INFO L226 Difference]: Without dead ends: 218 [2018-07-23 15:30:38,337 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:30:38,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-07-23 15:30:38,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2018-07-23 15:30:38,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-07-23 15:30:38,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-07-23 15:30:38,342 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 215 [2018-07-23 15:30:38,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:38,342 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-07-23 15:30:38,342 INFO L472 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-07-23 15:30:38,343 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-07-23 15:30:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-07-23 15:30:38,344 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:38,344 INFO L353 BasicCegarLoop]: trace histogram [108, 107, 1, 1] [2018-07-23 15:30:38,344 INFO L414 AbstractCegarLoop]: === Iteration 108 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:38,344 INFO L82 PathProgramCache]: Analyzing trace with hash -129849098, now seen corresponding path program 107 times [2018-07-23 15:30:38,344 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:38,727 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:38,727 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2018-07-23 15:30:38,727 INFO L450 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-07-23 15:30:38,729 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-07-23 15:30:38,729 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:30:38,730 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 110 states. [2018-07-23 15:30:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:38,964 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-07-23 15:30:38,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-23 15:30:38,964 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 217 [2018-07-23 15:30:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:38,965 INFO L225 Difference]: With dead ends: 221 [2018-07-23 15:30:38,965 INFO L226 Difference]: Without dead ends: 220 [2018-07-23 15:30:38,966 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:30:38,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-07-23 15:30:38,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2018-07-23 15:30:38,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-07-23 15:30:38,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-07-23 15:30:38,970 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 217 [2018-07-23 15:30:38,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:38,971 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-07-23 15:30:38,971 INFO L472 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-07-23 15:30:38,971 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-07-23 15:30:38,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-07-23 15:30:38,972 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:38,972 INFO L353 BasicCegarLoop]: trace histogram [109, 108, 1, 1] [2018-07-23 15:30:38,972 INFO L414 AbstractCegarLoop]: === Iteration 109 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:38,972 INFO L82 PathProgramCache]: Analyzing trace with hash -230930504, now seen corresponding path program 108 times [2018-07-23 15:30:38,972 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:39,352 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:39,352 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2018-07-23 15:30:39,352 INFO L450 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-07-23 15:30:39,354 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-07-23 15:30:39,354 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:30:39,354 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 111 states. [2018-07-23 15:30:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:39,552 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-07-23 15:30:39,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-07-23 15:30:39,552 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 219 [2018-07-23 15:30:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:39,553 INFO L225 Difference]: With dead ends: 223 [2018-07-23 15:30:39,553 INFO L226 Difference]: Without dead ends: 222 [2018-07-23 15:30:39,554 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:30:39,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-07-23 15:30:39,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2018-07-23 15:30:39,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-07-23 15:30:39,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2018-07-23 15:30:39,558 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 219 [2018-07-23 15:30:39,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:39,559 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2018-07-23 15:30:39,559 INFO L472 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-07-23 15:30:39,559 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2018-07-23 15:30:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-07-23 15:30:39,560 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:39,560 INFO L353 BasicCegarLoop]: trace histogram [110, 109, 1, 1] [2018-07-23 15:30:39,560 INFO L414 AbstractCegarLoop]: === Iteration 110 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:39,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1414086138, now seen corresponding path program 109 times [2018-07-23 15:30:39,561 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:39,964 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:39,965 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2018-07-23 15:30:39,965 INFO L450 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-07-23 15:30:39,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-07-23 15:30:39,967 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:30:39,968 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand 112 states. [2018-07-23 15:30:40,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:40,150 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-07-23 15:30:40,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-07-23 15:30:40,151 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 221 [2018-07-23 15:30:40,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:40,151 INFO L225 Difference]: With dead ends: 225 [2018-07-23 15:30:40,152 INFO L226 Difference]: Without dead ends: 224 [2018-07-23 15:30:40,153 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:30:40,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-07-23 15:30:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2018-07-23 15:30:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-07-23 15:30:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 224 transitions. [2018-07-23 15:30:40,157 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 224 transitions. Word has length 221 [2018-07-23 15:30:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:40,158 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 224 transitions. [2018-07-23 15:30:40,158 INFO L472 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-07-23 15:30:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 224 transitions. [2018-07-23 15:30:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-07-23 15:30:40,159 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:40,159 INFO L353 BasicCegarLoop]: trace histogram [111, 110, 1, 1] [2018-07-23 15:30:40,159 INFO L414 AbstractCegarLoop]: === Iteration 111 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:40,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1727114172, now seen corresponding path program 110 times [2018-07-23 15:30:40,160 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:40,547 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:40,547 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2018-07-23 15:30:40,548 INFO L450 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-07-23 15:30:40,549 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-07-23 15:30:40,549 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:30:40,549 INFO L87 Difference]: Start difference. First operand 224 states and 224 transitions. Second operand 113 states. [2018-07-23 15:30:40,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:40,723 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-07-23 15:30:40,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-07-23 15:30:40,723 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 223 [2018-07-23 15:30:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:40,723 INFO L225 Difference]: With dead ends: 227 [2018-07-23 15:30:40,724 INFO L226 Difference]: Without dead ends: 226 [2018-07-23 15:30:40,725 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:30:40,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-07-23 15:30:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-07-23 15:30:40,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-07-23 15:30:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 226 transitions. [2018-07-23 15:30:40,729 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 226 transitions. Word has length 223 [2018-07-23 15:30:40,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:40,729 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 226 transitions. [2018-07-23 15:30:40,729 INFO L472 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-07-23 15:30:40,729 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 226 transitions. [2018-07-23 15:30:40,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-07-23 15:30:40,730 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:40,730 INFO L353 BasicCegarLoop]: trace histogram [112, 111, 1, 1] [2018-07-23 15:30:40,730 INFO L414 AbstractCegarLoop]: === Iteration 112 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:40,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1899344126, now seen corresponding path program 111 times [2018-07-23 15:30:40,731 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:41,144 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:41,144 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2018-07-23 15:30:41,144 INFO L450 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-07-23 15:30:41,145 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-07-23 15:30:41,146 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:30:41,146 INFO L87 Difference]: Start difference. First operand 226 states and 226 transitions. Second operand 114 states. [2018-07-23 15:30:41,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:41,320 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-07-23 15:30:41,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-07-23 15:30:41,320 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 225 [2018-07-23 15:30:41,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:41,320 INFO L225 Difference]: With dead ends: 229 [2018-07-23 15:30:41,320 INFO L226 Difference]: Without dead ends: 228 [2018-07-23 15:30:41,321 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:30:41,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-07-23 15:30:41,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-07-23 15:30:41,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-07-23 15:30:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2018-07-23 15:30:41,324 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 225 [2018-07-23 15:30:41,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:41,324 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2018-07-23 15:30:41,324 INFO L472 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-07-23 15:30:41,324 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2018-07-23 15:30:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-07-23 15:30:41,325 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:41,325 INFO L353 BasicCegarLoop]: trace histogram [113, 112, 1, 1] [2018-07-23 15:30:41,325 INFO L414 AbstractCegarLoop]: === Iteration 113 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:41,325 INFO L82 PathProgramCache]: Analyzing trace with hash -91394624, now seen corresponding path program 112 times [2018-07-23 15:30:41,326 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:41,714 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:41,714 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2018-07-23 15:30:41,714 INFO L450 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-07-23 15:30:41,715 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-07-23 15:30:41,716 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:30:41,716 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 115 states. [2018-07-23 15:30:41,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:41,866 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2018-07-23 15:30:41,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-07-23 15:30:41,866 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 227 [2018-07-23 15:30:41,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:41,866 INFO L225 Difference]: With dead ends: 231 [2018-07-23 15:30:41,867 INFO L226 Difference]: Without dead ends: 230 [2018-07-23 15:30:41,867 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:30:41,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-07-23 15:30:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2018-07-23 15:30:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-07-23 15:30:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2018-07-23 15:30:41,870 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 227 [2018-07-23 15:30:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:41,871 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2018-07-23 15:30:41,871 INFO L472 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-07-23 15:30:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2018-07-23 15:30:41,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-07-23 15:30:41,872 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:41,872 INFO L353 BasicCegarLoop]: trace histogram [114, 113, 1, 1] [2018-07-23 15:30:41,872 INFO L414 AbstractCegarLoop]: === Iteration 114 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:41,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1930886654, now seen corresponding path program 113 times [2018-07-23 15:30:41,873 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:42,258 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:42,258 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2018-07-23 15:30:42,258 INFO L450 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-07-23 15:30:42,259 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-07-23 15:30:42,260 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:30:42,260 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand 116 states. [2018-07-23 15:30:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:42,426 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-07-23 15:30:42,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-07-23 15:30:42,427 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 229 [2018-07-23 15:30:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:42,427 INFO L225 Difference]: With dead ends: 233 [2018-07-23 15:30:42,428 INFO L226 Difference]: Without dead ends: 232 [2018-07-23 15:30:42,429 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:30:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-07-23 15:30:42,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2018-07-23 15:30:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-07-23 15:30:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-07-23 15:30:42,434 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 229 [2018-07-23 15:30:42,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:42,434 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-07-23 15:30:42,434 INFO L472 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-07-23 15:30:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-07-23 15:30:42,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-07-23 15:30:42,435 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:42,435 INFO L353 BasicCegarLoop]: trace histogram [115, 114, 1, 1] [2018-07-23 15:30:42,435 INFO L414 AbstractCegarLoop]: === Iteration 115 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:42,436 INFO L82 PathProgramCache]: Analyzing trace with hash -156201532, now seen corresponding path program 114 times [2018-07-23 15:30:42,436 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:42,850 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:42,850 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115] total 115 [2018-07-23 15:30:42,850 INFO L450 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-07-23 15:30:42,852 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-07-23 15:30:42,852 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:30:42,852 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 117 states. [2018-07-23 15:30:43,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:43,088 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-07-23 15:30:43,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-07-23 15:30:43,088 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 231 [2018-07-23 15:30:43,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:43,089 INFO L225 Difference]: With dead ends: 235 [2018-07-23 15:30:43,089 INFO L226 Difference]: Without dead ends: 234 [2018-07-23 15:30:43,091 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:30:43,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-07-23 15:30:43,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2018-07-23 15:30:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-07-23 15:30:43,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 234 transitions. [2018-07-23 15:30:43,095 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 234 transitions. Word has length 231 [2018-07-23 15:30:43,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:43,096 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 234 transitions. [2018-07-23 15:30:43,096 INFO L472 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-07-23 15:30:43,096 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 234 transitions. [2018-07-23 15:30:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-07-23 15:30:43,097 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:43,097 INFO L353 BasicCegarLoop]: trace histogram [116, 115, 1, 1] [2018-07-23 15:30:43,097 INFO L414 AbstractCegarLoop]: === Iteration 116 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:43,097 INFO L82 PathProgramCache]: Analyzing trace with hash 214184198, now seen corresponding path program 115 times [2018-07-23 15:30:43,098 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:43,610 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:43,610 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2018-07-23 15:30:43,610 INFO L450 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-07-23 15:30:43,612 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-07-23 15:30:43,613 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:30:43,613 INFO L87 Difference]: Start difference. First operand 234 states and 234 transitions. Second operand 118 states. [2018-07-23 15:30:43,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:43,897 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-07-23 15:30:43,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-07-23 15:30:43,897 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 233 [2018-07-23 15:30:43,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:43,898 INFO L225 Difference]: With dead ends: 237 [2018-07-23 15:30:43,898 INFO L226 Difference]: Without dead ends: 236 [2018-07-23 15:30:43,899 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:30:43,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-07-23 15:30:43,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2018-07-23 15:30:43,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-07-23 15:30:43,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2018-07-23 15:30:43,935 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 233 [2018-07-23 15:30:43,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:43,936 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2018-07-23 15:30:43,936 INFO L472 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-07-23 15:30:43,936 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2018-07-23 15:30:43,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-07-23 15:30:43,937 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:43,937 INFO L353 BasicCegarLoop]: trace histogram [117, 116, 1, 1] [2018-07-23 15:30:43,937 INFO L414 AbstractCegarLoop]: === Iteration 117 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:43,937 INFO L82 PathProgramCache]: Analyzing trace with hash -327414840, now seen corresponding path program 116 times [2018-07-23 15:30:43,937 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:44,312 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:44,312 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117] total 117 [2018-07-23 15:30:44,312 INFO L450 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-07-23 15:30:44,313 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-07-23 15:30:44,314 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:30:44,314 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 119 states. [2018-07-23 15:30:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:44,424 INFO L93 Difference]: Finished difference Result 239 states and 239 transitions. [2018-07-23 15:30:44,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-07-23 15:30:44,424 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 235 [2018-07-23 15:30:44,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:44,425 INFO L225 Difference]: With dead ends: 239 [2018-07-23 15:30:44,425 INFO L226 Difference]: Without dead ends: 238 [2018-07-23 15:30:44,426 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:30:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-07-23 15:30:44,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2018-07-23 15:30:44,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-07-23 15:30:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2018-07-23 15:30:44,429 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 235 [2018-07-23 15:30:44,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:44,429 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2018-07-23 15:30:44,429 INFO L472 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-07-23 15:30:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2018-07-23 15:30:44,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-07-23 15:30:44,430 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:44,430 INFO L353 BasicCegarLoop]: trace histogram [118, 117, 1, 1] [2018-07-23 15:30:44,431 INFO L414 AbstractCegarLoop]: === Iteration 118 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:44,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1113047542, now seen corresponding path program 117 times [2018-07-23 15:30:44,431 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:44,807 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:44,807 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2018-07-23 15:30:44,808 INFO L450 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-07-23 15:30:44,809 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-07-23 15:30:44,810 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:30:44,810 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand 120 states. [2018-07-23 15:30:44,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:44,984 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-07-23 15:30:44,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-07-23 15:30:44,985 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 237 [2018-07-23 15:30:44,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:44,985 INFO L225 Difference]: With dead ends: 241 [2018-07-23 15:30:44,985 INFO L226 Difference]: Without dead ends: 240 [2018-07-23 15:30:44,986 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:30:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-07-23 15:30:44,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2018-07-23 15:30:44,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-07-23 15:30:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 240 transitions. [2018-07-23 15:30:44,989 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 240 transitions. Word has length 237 [2018-07-23 15:30:44,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:44,989 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 240 transitions. [2018-07-23 15:30:44,989 INFO L472 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-07-23 15:30:44,989 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 240 transitions. [2018-07-23 15:30:44,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-07-23 15:30:44,990 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:44,990 INFO L353 BasicCegarLoop]: trace histogram [119, 118, 1, 1] [2018-07-23 15:30:44,990 INFO L414 AbstractCegarLoop]: === Iteration 119 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:44,990 INFO L82 PathProgramCache]: Analyzing trace with hash -191830068, now seen corresponding path program 118 times [2018-07-23 15:30:44,991 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:45,415 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:45,415 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119] total 119 [2018-07-23 15:30:45,415 INFO L450 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-07-23 15:30:45,417 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-07-23 15:30:45,417 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:30:45,417 INFO L87 Difference]: Start difference. First operand 240 states and 240 transitions. Second operand 121 states. [2018-07-23 15:30:45,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:45,684 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-07-23 15:30:45,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-07-23 15:30:45,684 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 239 [2018-07-23 15:30:45,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:45,685 INFO L225 Difference]: With dead ends: 243 [2018-07-23 15:30:45,685 INFO L226 Difference]: Without dead ends: 242 [2018-07-23 15:30:45,687 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:30:45,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-07-23 15:30:45,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2018-07-23 15:30:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-07-23 15:30:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2018-07-23 15:30:45,691 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 239 [2018-07-23 15:30:45,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:45,691 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2018-07-23 15:30:45,691 INFO L472 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-07-23 15:30:45,691 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2018-07-23 15:30:45,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-07-23 15:30:45,692 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:45,693 INFO L353 BasicCegarLoop]: trace histogram [120, 119, 1, 1] [2018-07-23 15:30:45,693 INFO L414 AbstractCegarLoop]: === Iteration 120 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:45,693 INFO L82 PathProgramCache]: Analyzing trace with hash 334899470, now seen corresponding path program 119 times [2018-07-23 15:30:45,693 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:46,296 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:46,296 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2018-07-23 15:30:46,296 INFO L450 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-07-23 15:30:46,297 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-07-23 15:30:46,298 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:30:46,298 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 122 states. [2018-07-23 15:30:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:46,512 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-07-23 15:30:46,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-07-23 15:30:46,512 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 241 [2018-07-23 15:30:46,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:46,512 INFO L225 Difference]: With dead ends: 245 [2018-07-23 15:30:46,512 INFO L226 Difference]: Without dead ends: 244 [2018-07-23 15:30:46,513 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:30:46,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-07-23 15:30:46,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2018-07-23 15:30:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-07-23 15:30:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-07-23 15:30:46,516 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 241 [2018-07-23 15:30:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:46,517 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-07-23 15:30:46,517 INFO L472 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-07-23 15:30:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-07-23 15:30:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-07-23 15:30:46,518 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:46,518 INFO L353 BasicCegarLoop]: trace histogram [121, 120, 1, 1] [2018-07-23 15:30:46,518 INFO L414 AbstractCegarLoop]: === Iteration 121 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:46,518 INFO L82 PathProgramCache]: Analyzing trace with hash -284155440, now seen corresponding path program 120 times [2018-07-23 15:30:46,518 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:46,996 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:46,996 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121] total 121 [2018-07-23 15:30:46,997 INFO L450 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-07-23 15:30:46,998 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-07-23 15:30:46,998 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-07-23 15:30:46,998 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 123 states. [2018-07-23 15:30:47,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:47,137 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-07-23 15:30:47,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-07-23 15:30:47,138 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 243 [2018-07-23 15:30:47,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:47,138 INFO L225 Difference]: With dead ends: 247 [2018-07-23 15:30:47,139 INFO L226 Difference]: Without dead ends: 246 [2018-07-23 15:30:47,140 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-07-23 15:30:47,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-07-23 15:30:47,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-07-23 15:30:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-07-23 15:30:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 246 transitions. [2018-07-23 15:30:47,144 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 246 transitions. Word has length 243 [2018-07-23 15:30:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:47,145 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 246 transitions. [2018-07-23 15:30:47,145 INFO L472 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-07-23 15:30:47,145 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 246 transitions. [2018-07-23 15:30:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-07-23 15:30:47,146 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:47,146 INFO L353 BasicCegarLoop]: trace histogram [122, 121, 1, 1] [2018-07-23 15:30:47,146 INFO L414 AbstractCegarLoop]: === Iteration 122 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:47,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1804530194, now seen corresponding path program 121 times [2018-07-23 15:30:47,147 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:47,619 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:47,619 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2018-07-23 15:30:47,619 INFO L450 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-07-23 15:30:47,620 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-07-23 15:30:47,621 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:30:47,621 INFO L87 Difference]: Start difference. First operand 246 states and 246 transitions. Second operand 124 states. [2018-07-23 15:30:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:47,943 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-07-23 15:30:47,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-07-23 15:30:47,943 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 245 [2018-07-23 15:30:47,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:47,944 INFO L225 Difference]: With dead ends: 249 [2018-07-23 15:30:47,944 INFO L226 Difference]: Without dead ends: 248 [2018-07-23 15:30:47,946 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:30:47,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-07-23 15:30:47,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2018-07-23 15:30:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-07-23 15:30:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2018-07-23 15:30:47,950 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 245 [2018-07-23 15:30:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:47,951 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2018-07-23 15:30:47,951 INFO L472 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-07-23 15:30:47,951 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2018-07-23 15:30:47,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-07-23 15:30:47,952 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:47,952 INFO L353 BasicCegarLoop]: trace histogram [123, 122, 1, 1] [2018-07-23 15:30:47,952 INFO L414 AbstractCegarLoop]: === Iteration 123 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:47,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1013270060, now seen corresponding path program 122 times [2018-07-23 15:30:47,952 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:48,373 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:48,373 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123] total 123 [2018-07-23 15:30:48,373 INFO L450 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-07-23 15:30:48,375 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-07-23 15:30:48,375 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:30:48,375 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 125 states. [2018-07-23 15:30:48,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:48,874 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2018-07-23 15:30:48,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-07-23 15:30:48,875 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 247 [2018-07-23 15:30:48,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:48,876 INFO L225 Difference]: With dead ends: 251 [2018-07-23 15:30:48,876 INFO L226 Difference]: Without dead ends: 250 [2018-07-23 15:30:48,878 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:30:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-07-23 15:30:48,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2018-07-23 15:30:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-07-23 15:30:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 250 transitions. [2018-07-23 15:30:48,883 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 250 transitions. Word has length 247 [2018-07-23 15:30:48,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:48,884 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 250 transitions. [2018-07-23 15:30:48,884 INFO L472 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-07-23 15:30:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 250 transitions. [2018-07-23 15:30:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-07-23 15:30:48,885 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:48,885 INFO L353 BasicCegarLoop]: trace histogram [124, 123, 1, 1] [2018-07-23 15:30:48,886 INFO L414 AbstractCegarLoop]: === Iteration 124 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:48,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1205049622, now seen corresponding path program 123 times [2018-07-23 15:30:48,886 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:49,703 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:49,704 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2018-07-23 15:30:49,704 INFO L450 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-07-23 15:30:49,706 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-07-23 15:30:49,707 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-07-23 15:30:49,707 INFO L87 Difference]: Start difference. First operand 250 states and 250 transitions. Second operand 126 states. [2018-07-23 15:30:49,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:49,946 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-07-23 15:30:49,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-07-23 15:30:49,946 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 249 [2018-07-23 15:30:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:49,947 INFO L225 Difference]: With dead ends: 253 [2018-07-23 15:30:49,947 INFO L226 Difference]: Without dead ends: 252 [2018-07-23 15:30:49,949 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-07-23 15:30:49,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-07-23 15:30:49,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2018-07-23 15:30:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-07-23 15:30:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 252 transitions. [2018-07-23 15:30:49,954 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 252 transitions. Word has length 249 [2018-07-23 15:30:49,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:49,954 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 252 transitions. [2018-07-23 15:30:49,954 INFO L472 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-07-23 15:30:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 252 transitions. [2018-07-23 15:30:49,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-07-23 15:30:49,956 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:49,956 INFO L353 BasicCegarLoop]: trace histogram [125, 124, 1, 1] [2018-07-23 15:30:49,956 INFO L414 AbstractCegarLoop]: === Iteration 125 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:49,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1588482088, now seen corresponding path program 124 times [2018-07-23 15:30:49,956 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:50,719 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:50,719 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125] total 125 [2018-07-23 15:30:50,720 INFO L450 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-07-23 15:30:50,721 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-07-23 15:30:50,722 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:30:50,722 INFO L87 Difference]: Start difference. First operand 252 states and 252 transitions. Second operand 127 states. [2018-07-23 15:30:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:51,003 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2018-07-23 15:30:51,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-07-23 15:30:51,004 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 251 [2018-07-23 15:30:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:51,005 INFO L225 Difference]: With dead ends: 255 [2018-07-23 15:30:51,005 INFO L226 Difference]: Without dead ends: 254 [2018-07-23 15:30:51,007 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:30:51,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-07-23 15:30:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2018-07-23 15:30:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-07-23 15:30:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 254 transitions. [2018-07-23 15:30:51,044 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 254 transitions. Word has length 251 [2018-07-23 15:30:51,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:51,044 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 254 transitions. [2018-07-23 15:30:51,044 INFO L472 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-07-23 15:30:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 254 transitions. [2018-07-23 15:30:51,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-07-23 15:30:51,045 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:51,045 INFO L353 BasicCegarLoop]: trace histogram [126, 125, 1, 1] [2018-07-23 15:30:51,045 INFO L414 AbstractCegarLoop]: === Iteration 126 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:51,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1817895398, now seen corresponding path program 125 times [2018-07-23 15:30:51,046 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:51,483 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:51,483 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126] total 126 [2018-07-23 15:30:51,483 INFO L450 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-07-23 15:30:51,485 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-07-23 15:30:51,485 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:30:51,486 INFO L87 Difference]: Start difference. First operand 254 states and 254 transitions. Second operand 128 states. [2018-07-23 15:30:51,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:51,626 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-07-23 15:30:51,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-07-23 15:30:51,627 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 253 [2018-07-23 15:30:51,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:51,627 INFO L225 Difference]: With dead ends: 257 [2018-07-23 15:30:51,627 INFO L226 Difference]: Without dead ends: 256 [2018-07-23 15:30:51,629 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:30:51,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-07-23 15:30:51,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-07-23 15:30:51,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-07-23 15:30:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-07-23 15:30:51,634 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 253 [2018-07-23 15:30:51,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:51,634 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-07-23 15:30:51,634 INFO L472 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-07-23 15:30:51,634 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-07-23 15:30:51,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-07-23 15:30:51,635 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:51,635 INFO L353 BasicCegarLoop]: trace histogram [127, 126, 1, 1] [2018-07-23 15:30:51,636 INFO L414 AbstractCegarLoop]: === Iteration 127 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:51,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1054213084, now seen corresponding path program 126 times [2018-07-23 15:30:51,636 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16002 backedges. 0 proven. 16002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:52,126 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:52,126 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127] total 127 [2018-07-23 15:30:52,126 INFO L450 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-07-23 15:30:52,128 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-07-23 15:30:52,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-07-23 15:30:52,129 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 129 states. [2018-07-23 15:30:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:52,463 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-07-23 15:30:52,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-07-23 15:30:52,464 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 255 [2018-07-23 15:30:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:52,464 INFO L225 Difference]: With dead ends: 259 [2018-07-23 15:30:52,464 INFO L226 Difference]: Without dead ends: 258 [2018-07-23 15:30:52,465 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-07-23 15:30:52,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-07-23 15:30:52,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2018-07-23 15:30:52,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-07-23 15:30:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 258 transitions. [2018-07-23 15:30:52,470 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 258 transitions. Word has length 255 [2018-07-23 15:30:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:52,470 INFO L471 AbstractCegarLoop]: Abstraction has 258 states and 258 transitions. [2018-07-23 15:30:52,471 INFO L472 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-07-23 15:30:52,471 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 258 transitions. [2018-07-23 15:30:52,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-07-23 15:30:52,472 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:52,472 INFO L353 BasicCegarLoop]: trace histogram [128, 127, 1, 1] [2018-07-23 15:30:52,472 INFO L414 AbstractCegarLoop]: === Iteration 128 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:52,472 INFO L82 PathProgramCache]: Analyzing trace with hash -513507042, now seen corresponding path program 127 times [2018-07-23 15:30:52,473 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16256 backedges. 0 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:53,286 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:53,286 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128] total 128 [2018-07-23 15:30:53,287 INFO L450 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-07-23 15:30:53,294 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-07-23 15:30:53,295 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:30:53,296 INFO L87 Difference]: Start difference. First operand 258 states and 258 transitions. Second operand 130 states. [2018-07-23 15:30:53,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:53,496 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-07-23 15:30:53,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-07-23 15:30:53,497 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 257 [2018-07-23 15:30:53,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:53,497 INFO L225 Difference]: With dead ends: 261 [2018-07-23 15:30:53,497 INFO L226 Difference]: Without dead ends: 260 [2018-07-23 15:30:53,499 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:30:53,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-07-23 15:30:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2018-07-23 15:30:53,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-07-23 15:30:53,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 260 transitions. [2018-07-23 15:30:53,504 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 260 transitions. Word has length 257 [2018-07-23 15:30:53,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:53,504 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 260 transitions. [2018-07-23 15:30:53,504 INFO L472 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-07-23 15:30:53,504 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 260 transitions. [2018-07-23 15:30:53,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-07-23 15:30:53,505 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:53,505 INFO L353 BasicCegarLoop]: trace histogram [129, 128, 1, 1] [2018-07-23 15:30:53,506 INFO L414 AbstractCegarLoop]: === Iteration 129 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:53,506 INFO L82 PathProgramCache]: Analyzing trace with hash 440972768, now seen corresponding path program 128 times [2018-07-23 15:30:53,506 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16512 backedges. 0 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:53,974 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:53,974 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129] total 129 [2018-07-23 15:30:53,975 INFO L450 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-07-23 15:30:53,976 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-07-23 15:30:53,977 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-07-23 15:30:53,977 INFO L87 Difference]: Start difference. First operand 260 states and 260 transitions. Second operand 131 states. [2018-07-23 15:30:54,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:54,260 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2018-07-23 15:30:54,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-07-23 15:30:54,260 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 259 [2018-07-23 15:30:54,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:54,261 INFO L225 Difference]: With dead ends: 263 [2018-07-23 15:30:54,261 INFO L226 Difference]: Without dead ends: 262 [2018-07-23 15:30:54,263 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-07-23 15:30:54,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2018-07-23 15:30:54,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2018-07-23 15:30:54,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-07-23 15:30:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 262 transitions. [2018-07-23 15:30:54,266 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 262 transitions. Word has length 259 [2018-07-23 15:30:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:54,266 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 262 transitions. [2018-07-23 15:30:54,266 INFO L472 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-07-23 15:30:54,266 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 262 transitions. [2018-07-23 15:30:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-07-23 15:30:54,267 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:54,267 INFO L353 BasicCegarLoop]: trace histogram [130, 129, 1, 1] [2018-07-23 15:30:54,267 INFO L414 AbstractCegarLoop]: === Iteration 130 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:54,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1426931166, now seen corresponding path program 129 times [2018-07-23 15:30:54,267 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16770 backedges. 0 proven. 16770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:54,785 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:54,785 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130] total 130 [2018-07-23 15:30:54,786 INFO L450 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-07-23 15:30:54,787 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-07-23 15:30:54,788 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-07-23 15:30:54,788 INFO L87 Difference]: Start difference. First operand 262 states and 262 transitions. Second operand 132 states. [2018-07-23 15:30:55,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:55,087 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-07-23 15:30:55,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-07-23 15:30:55,087 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 261 [2018-07-23 15:30:55,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:55,088 INFO L225 Difference]: With dead ends: 265 [2018-07-23 15:30:55,088 INFO L226 Difference]: Without dead ends: 264 [2018-07-23 15:30:55,089 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-07-23 15:30:55,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-07-23 15:30:55,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2018-07-23 15:30:55,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-07-23 15:30:55,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 264 transitions. [2018-07-23 15:30:55,093 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 264 transitions. Word has length 261 [2018-07-23 15:30:55,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:55,094 INFO L471 AbstractCegarLoop]: Abstraction has 264 states and 264 transitions. [2018-07-23 15:30:55,094 INFO L472 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-07-23 15:30:55,094 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 264 transitions. [2018-07-23 15:30:55,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-07-23 15:30:55,095 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:55,095 INFO L353 BasicCegarLoop]: trace histogram [131, 130, 1, 1] [2018-07-23 15:30:55,095 INFO L414 AbstractCegarLoop]: === Iteration 131 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:55,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1186282012, now seen corresponding path program 130 times [2018-07-23 15:30:55,095 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17030 backedges. 0 proven. 17030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:55,574 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:55,574 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131] total 131 [2018-07-23 15:30:55,575 INFO L450 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-07-23 15:30:55,576 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-07-23 15:30:55,577 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-07-23 15:30:55,577 INFO L87 Difference]: Start difference. First operand 264 states and 264 transitions. Second operand 133 states. [2018-07-23 15:30:55,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:55,818 INFO L93 Difference]: Finished difference Result 267 states and 267 transitions. [2018-07-23 15:30:55,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-07-23 15:30:55,818 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 263 [2018-07-23 15:30:55,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:55,819 INFO L225 Difference]: With dead ends: 267 [2018-07-23 15:30:55,819 INFO L226 Difference]: Without dead ends: 266 [2018-07-23 15:30:55,820 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-07-23 15:30:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-07-23 15:30:55,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2018-07-23 15:30:55,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-07-23 15:30:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 266 transitions. [2018-07-23 15:30:55,824 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 266 transitions. Word has length 263 [2018-07-23 15:30:55,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:55,825 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 266 transitions. [2018-07-23 15:30:55,825 INFO L472 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-07-23 15:30:55,825 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 266 transitions. [2018-07-23 15:30:55,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-07-23 15:30:55,826 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:55,826 INFO L353 BasicCegarLoop]: trace histogram [132, 131, 1, 1] [2018-07-23 15:30:55,826 INFO L414 AbstractCegarLoop]: === Iteration 132 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:55,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1850679002, now seen corresponding path program 131 times [2018-07-23 15:30:55,827 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 17292 backedges. 0 proven. 17292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:56,387 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:56,387 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132] total 132 [2018-07-23 15:30:56,388 INFO L450 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-07-23 15:30:56,389 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-07-23 15:30:56,390 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-07-23 15:30:56,390 INFO L87 Difference]: Start difference. First operand 266 states and 266 transitions. Second operand 134 states. [2018-07-23 15:30:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:56,697 INFO L93 Difference]: Finished difference Result 269 states and 269 transitions. [2018-07-23 15:30:56,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-07-23 15:30:56,697 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 265 [2018-07-23 15:30:56,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:56,698 INFO L225 Difference]: With dead ends: 269 [2018-07-23 15:30:56,698 INFO L226 Difference]: Without dead ends: 268 [2018-07-23 15:30:56,699 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-07-23 15:30:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-07-23 15:30:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2018-07-23 15:30:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-07-23 15:30:56,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-07-23 15:30:56,702 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 265 [2018-07-23 15:30:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:56,702 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-07-23 15:30:56,702 INFO L472 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-07-23 15:30:56,702 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-07-23 15:30:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-07-23 15:30:56,703 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:56,703 INFO L353 BasicCegarLoop]: trace histogram [133, 132, 1, 1] [2018-07-23 15:30:56,703 INFO L414 AbstractCegarLoop]: === Iteration 133 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:56,703 INFO L82 PathProgramCache]: Analyzing trace with hash -386059288, now seen corresponding path program 132 times [2018-07-23 15:30:56,703 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17556 backedges. 0 proven. 17556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:57,192 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:57,192 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133] total 133 [2018-07-23 15:30:57,193 INFO L450 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-07-23 15:30:57,194 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-07-23 15:30:57,195 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-07-23 15:30:57,195 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 135 states. [2018-07-23 15:30:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:57,609 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2018-07-23 15:30:57,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-07-23 15:30:57,610 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 267 [2018-07-23 15:30:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:57,610 INFO L225 Difference]: With dead ends: 271 [2018-07-23 15:30:57,610 INFO L226 Difference]: Without dead ends: 270 [2018-07-23 15:30:57,612 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-07-23 15:30:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-07-23 15:30:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2018-07-23 15:30:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-07-23 15:30:57,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 270 transitions. [2018-07-23 15:30:57,615 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 270 transitions. Word has length 267 [2018-07-23 15:30:57,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:57,615 INFO L471 AbstractCegarLoop]: Abstraction has 270 states and 270 transitions. [2018-07-23 15:30:57,615 INFO L472 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-07-23 15:30:57,615 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 270 transitions. [2018-07-23 15:30:57,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2018-07-23 15:30:57,616 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:57,616 INFO L353 BasicCegarLoop]: trace histogram [134, 133, 1, 1] [2018-07-23 15:30:57,616 INFO L414 AbstractCegarLoop]: === Iteration 134 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:57,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1635787222, now seen corresponding path program 133 times [2018-07-23 15:30:57,617 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 17822 backedges. 0 proven. 17822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:58,268 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:58,268 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134] total 134 [2018-07-23 15:30:58,269 INFO L450 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-07-23 15:30:58,271 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-07-23 15:30:58,272 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:30:58,272 INFO L87 Difference]: Start difference. First operand 270 states and 270 transitions. Second operand 136 states. [2018-07-23 15:30:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:58,435 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-07-23 15:30:58,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-07-23 15:30:58,436 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 269 [2018-07-23 15:30:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:58,437 INFO L225 Difference]: With dead ends: 273 [2018-07-23 15:30:58,437 INFO L226 Difference]: Without dead ends: 272 [2018-07-23 15:30:58,438 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:30:58,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2018-07-23 15:30:58,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2018-07-23 15:30:58,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2018-07-23 15:30:58,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 272 transitions. [2018-07-23 15:30:58,442 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 272 transitions. Word has length 269 [2018-07-23 15:30:58,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:58,443 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 272 transitions. [2018-07-23 15:30:58,443 INFO L472 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-07-23 15:30:58,443 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 272 transitions. [2018-07-23 15:30:58,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-07-23 15:30:58,444 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:58,444 INFO L353 BasicCegarLoop]: trace histogram [135, 134, 1, 1] [2018-07-23 15:30:58,444 INFO L414 AbstractCegarLoop]: === Iteration 135 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:58,444 INFO L82 PathProgramCache]: Analyzing trace with hash -33488916, now seen corresponding path program 134 times [2018-07-23 15:30:58,445 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 18090 backedges. 0 proven. 18090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:58,965 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:58,965 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135] total 135 [2018-07-23 15:30:58,965 INFO L450 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-07-23 15:30:58,967 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-07-23 15:30:58,967 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-07-23 15:30:58,968 INFO L87 Difference]: Start difference. First operand 272 states and 272 transitions. Second operand 137 states. [2018-07-23 15:30:59,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:59,322 INFO L93 Difference]: Finished difference Result 275 states and 275 transitions. [2018-07-23 15:30:59,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-07-23 15:30:59,323 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 271 [2018-07-23 15:30:59,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:59,323 INFO L225 Difference]: With dead ends: 275 [2018-07-23 15:30:59,323 INFO L226 Difference]: Without dead ends: 274 [2018-07-23 15:30:59,325 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-07-23 15:30:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-07-23 15:30:59,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2018-07-23 15:30:59,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-07-23 15:30:59,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 274 transitions. [2018-07-23 15:30:59,330 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 274 transitions. Word has length 271 [2018-07-23 15:30:59,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:59,330 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 274 transitions. [2018-07-23 15:30:59,330 INFO L472 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-07-23 15:30:59,330 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 274 transitions. [2018-07-23 15:30:59,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-07-23 15:30:59,332 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:59,332 INFO L353 BasicCegarLoop]: trace histogram [136, 135, 1, 1] [2018-07-23 15:30:59,332 INFO L414 AbstractCegarLoop]: === Iteration 136 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:30:59,332 INFO L82 PathProgramCache]: Analyzing trace with hash -2118076114, now seen corresponding path program 135 times [2018-07-23 15:30:59,332 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18360 backedges. 0 proven. 18360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:00,072 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:00,072 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136] total 136 [2018-07-23 15:31:00,072 INFO L450 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-07-23 15:31:00,073 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-07-23 15:31:00,074 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:31:00,074 INFO L87 Difference]: Start difference. First operand 274 states and 274 transitions. Second operand 138 states. [2018-07-23 15:31:00,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:00,452 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-07-23 15:31:00,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-07-23 15:31:00,452 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 273 [2018-07-23 15:31:00,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:00,453 INFO L225 Difference]: With dead ends: 277 [2018-07-23 15:31:00,453 INFO L226 Difference]: Without dead ends: 276 [2018-07-23 15:31:00,454 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:31:00,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-07-23 15:31:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2018-07-23 15:31:00,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-07-23 15:31:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 276 transitions. [2018-07-23 15:31:00,457 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 276 transitions. Word has length 273 [2018-07-23 15:31:00,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:00,458 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 276 transitions. [2018-07-23 15:31:00,458 INFO L472 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-07-23 15:31:00,458 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 276 transitions. [2018-07-23 15:31:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-07-23 15:31:00,459 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:00,459 INFO L353 BasicCegarLoop]: trace histogram [137, 136, 1, 1] [2018-07-23 15:31:00,459 INFO L414 AbstractCegarLoop]: === Iteration 137 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:00,459 INFO L82 PathProgramCache]: Analyzing trace with hash 343353840, now seen corresponding path program 136 times [2018-07-23 15:31:00,459 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18632 backedges. 0 proven. 18632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:01,094 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:01,094 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137] total 137 [2018-07-23 15:31:01,095 INFO L450 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-07-23 15:31:01,096 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-07-23 15:31:01,097 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 15:31:01,097 INFO L87 Difference]: Start difference. First operand 276 states and 276 transitions. Second operand 139 states. [2018-07-23 15:31:01,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:01,495 INFO L93 Difference]: Finished difference Result 279 states and 279 transitions. [2018-07-23 15:31:01,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-07-23 15:31:01,495 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 275 [2018-07-23 15:31:01,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:01,496 INFO L225 Difference]: With dead ends: 279 [2018-07-23 15:31:01,496 INFO L226 Difference]: Without dead ends: 278 [2018-07-23 15:31:01,497 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 15:31:01,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-07-23 15:31:01,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2018-07-23 15:31:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2018-07-23 15:31:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 278 transitions. [2018-07-23 15:31:01,500 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 278 transitions. Word has length 275 [2018-07-23 15:31:01,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:01,500 INFO L471 AbstractCegarLoop]: Abstraction has 278 states and 278 transitions. [2018-07-23 15:31:01,500 INFO L472 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-07-23 15:31:01,501 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 278 transitions. [2018-07-23 15:31:01,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-07-23 15:31:01,501 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:01,501 INFO L353 BasicCegarLoop]: trace histogram [138, 137, 1, 1] [2018-07-23 15:31:01,501 INFO L414 AbstractCegarLoop]: === Iteration 138 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:01,502 INFO L82 PathProgramCache]: Analyzing trace with hash -749440462, now seen corresponding path program 137 times [2018-07-23 15:31:01,502 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18906 backedges. 0 proven. 18906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:02,054 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:02,054 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138] total 138 [2018-07-23 15:31:02,055 INFO L450 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-07-23 15:31:02,056 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-07-23 15:31:02,056 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:31:02,057 INFO L87 Difference]: Start difference. First operand 278 states and 278 transitions. Second operand 140 states. [2018-07-23 15:31:02,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:02,520 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2018-07-23 15:31:02,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-07-23 15:31:02,520 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 277 [2018-07-23 15:31:02,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:02,521 INFO L225 Difference]: With dead ends: 281 [2018-07-23 15:31:02,521 INFO L226 Difference]: Without dead ends: 280 [2018-07-23 15:31:02,521 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:31:02,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-07-23 15:31:02,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2018-07-23 15:31:02,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-07-23 15:31:02,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2018-07-23 15:31:02,525 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 277 [2018-07-23 15:31:02,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:02,526 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2018-07-23 15:31:02,526 INFO L472 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-07-23 15:31:02,526 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2018-07-23 15:31:02,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-07-23 15:31:02,527 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:02,527 INFO L353 BasicCegarLoop]: trace histogram [139, 138, 1, 1] [2018-07-23 15:31:02,527 INFO L414 AbstractCegarLoop]: === Iteration 139 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:02,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1342222836, now seen corresponding path program 138 times [2018-07-23 15:31:02,528 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 19182 backedges. 0 proven. 19182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:03,048 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:03,048 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139] total 139 [2018-07-23 15:31:03,049 INFO L450 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-07-23 15:31:03,050 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-07-23 15:31:03,051 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-07-23 15:31:03,051 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 141 states. [2018-07-23 15:31:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:03,536 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2018-07-23 15:31:03,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-07-23 15:31:03,536 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 279 [2018-07-23 15:31:03,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:03,537 INFO L225 Difference]: With dead ends: 283 [2018-07-23 15:31:03,537 INFO L226 Difference]: Without dead ends: 282 [2018-07-23 15:31:03,538 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-07-23 15:31:03,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-07-23 15:31:03,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2018-07-23 15:31:03,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-07-23 15:31:03,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 282 transitions. [2018-07-23 15:31:03,541 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 282 transitions. Word has length 279 [2018-07-23 15:31:03,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:03,541 INFO L471 AbstractCegarLoop]: Abstraction has 282 states and 282 transitions. [2018-07-23 15:31:03,541 INFO L472 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-07-23 15:31:03,541 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 282 transitions. [2018-07-23 15:31:03,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-07-23 15:31:03,542 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:03,543 INFO L353 BasicCegarLoop]: trace histogram [140, 139, 1, 1] [2018-07-23 15:31:03,543 INFO L414 AbstractCegarLoop]: === Iteration 140 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:03,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1385957686, now seen corresponding path program 139 times [2018-07-23 15:31:03,543 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 19460 backedges. 0 proven. 19460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:04,137 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:04,137 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140] total 140 [2018-07-23 15:31:04,137 INFO L450 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-07-23 15:31:04,139 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-07-23 15:31:04,139 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:31:04,140 INFO L87 Difference]: Start difference. First operand 282 states and 282 transitions. Second operand 142 states. [2018-07-23 15:31:04,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:04,634 INFO L93 Difference]: Finished difference Result 285 states and 285 transitions. [2018-07-23 15:31:04,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-07-23 15:31:04,634 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 281 [2018-07-23 15:31:04,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:04,635 INFO L225 Difference]: With dead ends: 285 [2018-07-23 15:31:04,635 INFO L226 Difference]: Without dead ends: 284 [2018-07-23 15:31:04,636 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:31:04,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2018-07-23 15:31:04,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2018-07-23 15:31:04,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-07-23 15:31:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 284 transitions. [2018-07-23 15:31:04,639 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 284 transitions. Word has length 281 [2018-07-23 15:31:04,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:04,639 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 284 transitions. [2018-07-23 15:31:04,639 INFO L472 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-07-23 15:31:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 284 transitions. [2018-07-23 15:31:04,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-07-23 15:31:04,640 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:04,640 INFO L353 BasicCegarLoop]: trace histogram [141, 140, 1, 1] [2018-07-23 15:31:04,640 INFO L414 AbstractCegarLoop]: === Iteration 141 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:04,641 INFO L82 PathProgramCache]: Analyzing trace with hash 465475576, now seen corresponding path program 140 times [2018-07-23 15:31:04,641 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 19740 backedges. 0 proven. 19740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:05,182 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:05,182 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141] total 141 [2018-07-23 15:31:05,183 INFO L450 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-07-23 15:31:05,184 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-07-23 15:31:05,185 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-07-23 15:31:05,185 INFO L87 Difference]: Start difference. First operand 284 states and 284 transitions. Second operand 143 states. [2018-07-23 15:31:05,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:05,689 INFO L93 Difference]: Finished difference Result 287 states and 287 transitions. [2018-07-23 15:31:05,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-07-23 15:31:05,689 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 283 [2018-07-23 15:31:05,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:05,690 INFO L225 Difference]: With dead ends: 287 [2018-07-23 15:31:05,690 INFO L226 Difference]: Without dead ends: 286 [2018-07-23 15:31:05,692 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-07-23 15:31:05,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-07-23 15:31:05,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2018-07-23 15:31:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-07-23 15:31:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 286 transitions. [2018-07-23 15:31:05,696 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 286 transitions. Word has length 283 [2018-07-23 15:31:05,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:05,697 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 286 transitions. [2018-07-23 15:31:05,697 INFO L472 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-07-23 15:31:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 286 transitions. [2018-07-23 15:31:05,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-07-23 15:31:05,698 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:05,698 INFO L353 BasicCegarLoop]: trace histogram [142, 141, 1, 1] [2018-07-23 15:31:05,698 INFO L414 AbstractCegarLoop]: === Iteration 142 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:05,699 INFO L82 PathProgramCache]: Analyzing trace with hash 645430842, now seen corresponding path program 141 times [2018-07-23 15:31:05,699 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20022 backedges. 0 proven. 20022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:06,328 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:06,328 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142] total 142 [2018-07-23 15:31:06,329 INFO L450 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-07-23 15:31:06,330 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-07-23 15:31:06,331 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-07-23 15:31:06,331 INFO L87 Difference]: Start difference. First operand 286 states and 286 transitions. Second operand 144 states. [2018-07-23 15:31:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:06,866 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-07-23 15:31:06,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-07-23 15:31:06,866 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 285 [2018-07-23 15:31:06,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:06,867 INFO L225 Difference]: With dead ends: 289 [2018-07-23 15:31:06,867 INFO L226 Difference]: Without dead ends: 288 [2018-07-23 15:31:06,868 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-07-23 15:31:06,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-07-23 15:31:06,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2018-07-23 15:31:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-07-23 15:31:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 288 transitions. [2018-07-23 15:31:06,872 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 288 transitions. Word has length 285 [2018-07-23 15:31:06,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:06,872 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 288 transitions. [2018-07-23 15:31:06,872 INFO L472 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-07-23 15:31:06,872 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 288 transitions. [2018-07-23 15:31:06,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-07-23 15:31:06,873 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:06,873 INFO L353 BasicCegarLoop]: trace histogram [143, 142, 1, 1] [2018-07-23 15:31:06,873 INFO L414 AbstractCegarLoop]: === Iteration 143 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:06,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1783749628, now seen corresponding path program 142 times [2018-07-23 15:31:06,873 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20306 backedges. 0 proven. 20306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:07,651 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:07,651 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143] total 143 [2018-07-23 15:31:07,651 INFO L450 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-07-23 15:31:07,653 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-07-23 15:31:07,654 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 15:31:07,654 INFO L87 Difference]: Start difference. First operand 288 states and 288 transitions. Second operand 145 states. [2018-07-23 15:31:08,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:08,197 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2018-07-23 15:31:08,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-07-23 15:31:08,198 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 287 [2018-07-23 15:31:08,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:08,198 INFO L225 Difference]: With dead ends: 291 [2018-07-23 15:31:08,198 INFO L226 Difference]: Without dead ends: 290 [2018-07-23 15:31:08,200 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 15:31:08,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-07-23 15:31:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-07-23 15:31:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-07-23 15:31:08,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 290 transitions. [2018-07-23 15:31:08,202 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 290 transitions. Word has length 287 [2018-07-23 15:31:08,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:08,203 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 290 transitions. [2018-07-23 15:31:08,203 INFO L472 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-07-23 15:31:08,203 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 290 transitions. [2018-07-23 15:31:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-07-23 15:31:08,204 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:08,204 INFO L353 BasicCegarLoop]: trace histogram [144, 143, 1, 1] [2018-07-23 15:31:08,204 INFO L414 AbstractCegarLoop]: === Iteration 144 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:08,204 INFO L82 PathProgramCache]: Analyzing trace with hash 491442494, now seen corresponding path program 143 times [2018-07-23 15:31:08,204 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20592 backedges. 0 proven. 20592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:08,799 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:08,800 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144] total 144 [2018-07-23 15:31:08,800 INFO L450 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-07-23 15:31:08,801 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-07-23 15:31:08,802 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:31:08,802 INFO L87 Difference]: Start difference. First operand 290 states and 290 transitions. Second operand 146 states. [2018-07-23 15:31:09,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:09,297 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2018-07-23 15:31:09,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-07-23 15:31:09,297 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 289 [2018-07-23 15:31:09,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:09,298 INFO L225 Difference]: With dead ends: 293 [2018-07-23 15:31:09,298 INFO L226 Difference]: Without dead ends: 292 [2018-07-23 15:31:09,299 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:31:09,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-07-23 15:31:09,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2018-07-23 15:31:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-07-23 15:31:09,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2018-07-23 15:31:09,302 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 289 [2018-07-23 15:31:09,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:09,302 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2018-07-23 15:31:09,302 INFO L472 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-07-23 15:31:09,302 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2018-07-23 15:31:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-07-23 15:31:09,303 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:09,303 INFO L353 BasicCegarLoop]: trace histogram [145, 144, 1, 1] [2018-07-23 15:31:09,303 INFO L414 AbstractCegarLoop]: === Iteration 145 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:09,303 INFO L82 PathProgramCache]: Analyzing trace with hash -170164736, now seen corresponding path program 144 times [2018-07-23 15:31:09,303 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20880 backedges. 0 proven. 20880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:09,902 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:09,902 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145] total 145 [2018-07-23 15:31:09,902 INFO L450 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-07-23 15:31:09,904 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-07-23 15:31:09,905 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-07-23 15:31:09,905 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 147 states. [2018-07-23 15:31:10,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:10,424 INFO L93 Difference]: Finished difference Result 295 states and 295 transitions. [2018-07-23 15:31:10,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-07-23 15:31:10,424 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 291 [2018-07-23 15:31:10,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:10,425 INFO L225 Difference]: With dead ends: 295 [2018-07-23 15:31:10,425 INFO L226 Difference]: Without dead ends: 294 [2018-07-23 15:31:10,426 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-07-23 15:31:10,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-07-23 15:31:10,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2018-07-23 15:31:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-07-23 15:31:10,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 294 transitions. [2018-07-23 15:31:10,429 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 294 transitions. Word has length 291 [2018-07-23 15:31:10,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:10,429 INFO L471 AbstractCegarLoop]: Abstraction has 294 states and 294 transitions. [2018-07-23 15:31:10,429 INFO L472 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-07-23 15:31:10,429 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 294 transitions. [2018-07-23 15:31:10,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-07-23 15:31:10,430 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:10,430 INFO L353 BasicCegarLoop]: trace histogram [146, 145, 1, 1] [2018-07-23 15:31:10,430 INFO L414 AbstractCegarLoop]: === Iteration 146 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:10,431 INFO L82 PathProgramCache]: Analyzing trace with hash -319552958, now seen corresponding path program 145 times [2018-07-23 15:31:10,431 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 21170 backedges. 0 proven. 21170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:11,068 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:11,068 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146] total 146 [2018-07-23 15:31:11,068 INFO L450 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-07-23 15:31:11,070 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-07-23 15:31:11,071 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:31:11,071 INFO L87 Difference]: Start difference. First operand 294 states and 294 transitions. Second operand 148 states. [2018-07-23 15:31:11,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:11,461 INFO L93 Difference]: Finished difference Result 297 states and 297 transitions. [2018-07-23 15:31:11,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-07-23 15:31:11,462 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 293 [2018-07-23 15:31:11,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:11,462 INFO L225 Difference]: With dead ends: 297 [2018-07-23 15:31:11,462 INFO L226 Difference]: Without dead ends: 296 [2018-07-23 15:31:11,464 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:31:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2018-07-23 15:31:11,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2018-07-23 15:31:11,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-07-23 15:31:11,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 296 transitions. [2018-07-23 15:31:11,467 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 296 transitions. Word has length 293 [2018-07-23 15:31:11,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:11,467 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 296 transitions. [2018-07-23 15:31:11,467 INFO L472 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-07-23 15:31:11,467 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 296 transitions. [2018-07-23 15:31:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-07-23 15:31:11,468 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:11,468 INFO L353 BasicCegarLoop]: trace histogram [147, 146, 1, 1] [2018-07-23 15:31:11,468 INFO L414 AbstractCegarLoop]: === Iteration 147 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:11,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2147253764, now seen corresponding path program 146 times [2018-07-23 15:31:11,469 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 21462 backedges. 0 proven. 21462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:12,114 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:12,115 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147] total 147 [2018-07-23 15:31:12,115 INFO L450 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-07-23 15:31:12,117 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-07-23 15:31:12,118 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-07-23 15:31:12,118 INFO L87 Difference]: Start difference. First operand 296 states and 296 transitions. Second operand 149 states. [2018-07-23 15:31:12,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:12,330 INFO L93 Difference]: Finished difference Result 299 states and 299 transitions. [2018-07-23 15:31:12,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-07-23 15:31:12,330 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 295 [2018-07-23 15:31:12,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:12,331 INFO L225 Difference]: With dead ends: 299 [2018-07-23 15:31:12,331 INFO L226 Difference]: Without dead ends: 298 [2018-07-23 15:31:12,333 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-07-23 15:31:12,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-07-23 15:31:12,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2018-07-23 15:31:12,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-07-23 15:31:12,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 298 transitions. [2018-07-23 15:31:12,338 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 298 transitions. Word has length 295 [2018-07-23 15:31:12,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:12,338 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 298 transitions. [2018-07-23 15:31:12,338 INFO L472 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-07-23 15:31:12,338 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 298 transitions. [2018-07-23 15:31:12,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-07-23 15:31:12,340 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:12,340 INFO L353 BasicCegarLoop]: trace histogram [148, 147, 1, 1] [2018-07-23 15:31:12,340 INFO L414 AbstractCegarLoop]: === Iteration 148 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:12,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1926566214, now seen corresponding path program 147 times [2018-07-23 15:31:12,340 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21756 backedges. 0 proven. 21756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:13,115 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:13,115 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148] total 148 [2018-07-23 15:31:13,116 INFO L450 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-07-23 15:31:13,118 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-07-23 15:31:13,119 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-07-23 15:31:13,119 INFO L87 Difference]: Start difference. First operand 298 states and 298 transitions. Second operand 150 states. [2018-07-23 15:31:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:13,839 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-07-23 15:31:13,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-07-23 15:31:13,839 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 297 [2018-07-23 15:31:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:13,840 INFO L225 Difference]: With dead ends: 301 [2018-07-23 15:31:13,840 INFO L226 Difference]: Without dead ends: 300 [2018-07-23 15:31:13,841 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-07-23 15:31:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2018-07-23 15:31:13,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2018-07-23 15:31:13,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-07-23 15:31:13,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 300 transitions. [2018-07-23 15:31:13,844 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 300 transitions. Word has length 297 [2018-07-23 15:31:13,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:13,845 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 300 transitions. [2018-07-23 15:31:13,845 INFO L472 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-07-23 15:31:13,845 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 300 transitions. [2018-07-23 15:31:13,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2018-07-23 15:31:13,845 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:13,845 INFO L353 BasicCegarLoop]: trace histogram [149, 148, 1, 1] [2018-07-23 15:31:13,846 INFO L414 AbstractCegarLoop]: === Iteration 149 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:13,846 INFO L82 PathProgramCache]: Analyzing trace with hash 299228168, now seen corresponding path program 148 times [2018-07-23 15:31:13,846 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 22052 backedges. 0 proven. 22052 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:14,526 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:14,527 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149] total 149 [2018-07-23 15:31:14,527 INFO L450 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-07-23 15:31:14,529 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-07-23 15:31:14,529 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-07-23 15:31:14,530 INFO L87 Difference]: Start difference. First operand 300 states and 300 transitions. Second operand 151 states. [2018-07-23 15:31:15,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:15,061 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2018-07-23 15:31:15,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-07-23 15:31:15,061 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 299 [2018-07-23 15:31:15,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:15,062 INFO L225 Difference]: With dead ends: 303 [2018-07-23 15:31:15,062 INFO L226 Difference]: Without dead ends: 302 [2018-07-23 15:31:15,063 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-07-23 15:31:15,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-07-23 15:31:15,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2018-07-23 15:31:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-07-23 15:31:15,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 302 transitions. [2018-07-23 15:31:15,066 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 302 transitions. Word has length 299 [2018-07-23 15:31:15,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:15,066 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 302 transitions. [2018-07-23 15:31:15,066 INFO L472 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-07-23 15:31:15,066 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 302 transitions. [2018-07-23 15:31:15,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-07-23 15:31:15,067 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:15,067 INFO L353 BasicCegarLoop]: trace histogram [150, 149, 1, 1] [2018-07-23 15:31:15,067 INFO L414 AbstractCegarLoop]: === Iteration 150 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:15,067 INFO L82 PathProgramCache]: Analyzing trace with hash -204538294, now seen corresponding path program 149 times [2018-07-23 15:31:15,067 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 22350 backedges. 0 proven. 22350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:15,747 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:15,748 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150] total 150 [2018-07-23 15:31:15,748 INFO L450 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-07-23 15:31:15,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-07-23 15:31:15,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:31:15,751 INFO L87 Difference]: Start difference. First operand 302 states and 302 transitions. Second operand 152 states. [2018-07-23 15:31:16,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:16,040 INFO L93 Difference]: Finished difference Result 305 states and 305 transitions. [2018-07-23 15:31:16,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-07-23 15:31:16,040 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 301 [2018-07-23 15:31:16,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:16,041 INFO L225 Difference]: With dead ends: 305 [2018-07-23 15:31:16,041 INFO L226 Difference]: Without dead ends: 304 [2018-07-23 15:31:16,043 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:31:16,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2018-07-23 15:31:16,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2018-07-23 15:31:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-07-23 15:31:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-07-23 15:31:16,048 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 301 [2018-07-23 15:31:16,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:16,048 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-07-23 15:31:16,048 INFO L472 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-07-23 15:31:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-07-23 15:31:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-07-23 15:31:16,049 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:16,049 INFO L353 BasicCegarLoop]: trace histogram [151, 150, 1, 1] [2018-07-23 15:31:16,049 INFO L414 AbstractCegarLoop]: === Iteration 151 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:16,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1007196172, now seen corresponding path program 150 times [2018-07-23 15:31:16,049 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 22650 backedges. 0 proven. 22650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:16,821 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:16,821 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151] total 151 [2018-07-23 15:31:16,821 INFO L450 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-07-23 15:31:16,823 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-07-23 15:31:16,825 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-07-23 15:31:16,825 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 153 states. [2018-07-23 15:31:17,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:17,432 INFO L93 Difference]: Finished difference Result 307 states and 307 transitions. [2018-07-23 15:31:17,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-07-23 15:31:17,432 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 303 [2018-07-23 15:31:17,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:17,432 INFO L225 Difference]: With dead ends: 307 [2018-07-23 15:31:17,433 INFO L226 Difference]: Without dead ends: 306 [2018-07-23 15:31:17,434 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-07-23 15:31:17,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2018-07-23 15:31:17,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2018-07-23 15:31:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2018-07-23 15:31:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 306 transitions. [2018-07-23 15:31:17,437 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 306 transitions. Word has length 303 [2018-07-23 15:31:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:17,437 INFO L471 AbstractCegarLoop]: Abstraction has 306 states and 306 transitions. [2018-07-23 15:31:17,437 INFO L472 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-07-23 15:31:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 306 transitions. [2018-07-23 15:31:17,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-07-23 15:31:17,438 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:17,438 INFO L353 BasicCegarLoop]: trace histogram [152, 151, 1, 1] [2018-07-23 15:31:17,438 INFO L414 AbstractCegarLoop]: === Iteration 152 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:17,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1547880782, now seen corresponding path program 151 times [2018-07-23 15:31:17,439 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 22952 backedges. 0 proven. 22952 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:18,105 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:18,105 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152] total 152 [2018-07-23 15:31:18,106 INFO L450 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-07-23 15:31:18,107 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-07-23 15:31:18,108 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-07-23 15:31:18,108 INFO L87 Difference]: Start difference. First operand 306 states and 306 transitions. Second operand 154 states. [2018-07-23 15:31:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:18,730 INFO L93 Difference]: Finished difference Result 309 states and 309 transitions. [2018-07-23 15:31:18,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-07-23 15:31:18,731 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 305 [2018-07-23 15:31:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:18,731 INFO L225 Difference]: With dead ends: 309 [2018-07-23 15:31:18,732 INFO L226 Difference]: Without dead ends: 308 [2018-07-23 15:31:18,733 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-07-23 15:31:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-07-23 15:31:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2018-07-23 15:31:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-07-23 15:31:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 308 transitions. [2018-07-23 15:31:18,737 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 308 transitions. Word has length 305 [2018-07-23 15:31:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:18,738 INFO L471 AbstractCegarLoop]: Abstraction has 308 states and 308 transitions. [2018-07-23 15:31:18,738 INFO L472 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-07-23 15:31:18,738 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 308 transitions. [2018-07-23 15:31:18,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-07-23 15:31:18,739 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:18,739 INFO L353 BasicCegarLoop]: trace histogram [153, 152, 1, 1] [2018-07-23 15:31:18,739 INFO L414 AbstractCegarLoop]: === Iteration 153 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:18,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1454748176, now seen corresponding path program 152 times [2018-07-23 15:31:18,740 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 23256 backedges. 0 proven. 23256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:19,486 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:19,486 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153] total 153 [2018-07-23 15:31:19,487 INFO L450 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-07-23 15:31:19,488 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-07-23 15:31:19,489 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:31:19,490 INFO L87 Difference]: Start difference. First operand 308 states and 308 transitions. Second operand 155 states. [2018-07-23 15:31:19,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:19,770 INFO L93 Difference]: Finished difference Result 311 states and 311 transitions. [2018-07-23 15:31:19,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-07-23 15:31:19,770 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 307 [2018-07-23 15:31:19,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:19,771 INFO L225 Difference]: With dead ends: 311 [2018-07-23 15:31:19,771 INFO L226 Difference]: Without dead ends: 310 [2018-07-23 15:31:19,773 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:31:19,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2018-07-23 15:31:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2018-07-23 15:31:19,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2018-07-23 15:31:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 310 transitions. [2018-07-23 15:31:19,776 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 310 transitions. Word has length 307 [2018-07-23 15:31:19,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:19,776 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 310 transitions. [2018-07-23 15:31:19,776 INFO L472 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-07-23 15:31:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 310 transitions. [2018-07-23 15:31:19,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-07-23 15:31:19,777 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:19,777 INFO L353 BasicCegarLoop]: trace histogram [154, 153, 1, 1] [2018-07-23 15:31:19,777 INFO L414 AbstractCegarLoop]: === Iteration 154 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:19,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2146340270, now seen corresponding path program 153 times [2018-07-23 15:31:19,777 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 23562 backedges. 0 proven. 23562 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:20,603 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:20,603 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154] total 154 [2018-07-23 15:31:20,603 INFO L450 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-07-23 15:31:20,605 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-07-23 15:31:20,606 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-07-23 15:31:20,606 INFO L87 Difference]: Start difference. First operand 310 states and 310 transitions. Second operand 156 states. [2018-07-23 15:31:21,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:21,299 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-07-23 15:31:21,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-07-23 15:31:21,299 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 309 [2018-07-23 15:31:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:21,300 INFO L225 Difference]: With dead ends: 313 [2018-07-23 15:31:21,300 INFO L226 Difference]: Without dead ends: 312 [2018-07-23 15:31:21,302 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-07-23 15:31:21,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-07-23 15:31:21,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2018-07-23 15:31:21,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2018-07-23 15:31:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 312 transitions. [2018-07-23 15:31:21,305 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 312 transitions. Word has length 309 [2018-07-23 15:31:21,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:21,305 INFO L471 AbstractCegarLoop]: Abstraction has 312 states and 312 transitions. [2018-07-23 15:31:21,305 INFO L472 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-07-23 15:31:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 312 transitions. [2018-07-23 15:31:21,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2018-07-23 15:31:21,306 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:21,306 INFO L353 BasicCegarLoop]: trace histogram [155, 154, 1, 1] [2018-07-23 15:31:21,306 INFO L414 AbstractCegarLoop]: === Iteration 155 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:21,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1048696300, now seen corresponding path program 154 times [2018-07-23 15:31:21,306 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 23870 backedges. 0 proven. 23870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:21,990 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:21,990 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155] total 155 [2018-07-23 15:31:21,990 INFO L450 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-07-23 15:31:21,993 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-07-23 15:31:21,994 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-07-23 15:31:21,994 INFO L87 Difference]: Start difference. First operand 312 states and 312 transitions. Second operand 157 states. [2018-07-23 15:31:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:22,217 INFO L93 Difference]: Finished difference Result 315 states and 315 transitions. [2018-07-23 15:31:22,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-07-23 15:31:22,218 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 311 [2018-07-23 15:31:22,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:22,218 INFO L225 Difference]: With dead ends: 315 [2018-07-23 15:31:22,218 INFO L226 Difference]: Without dead ends: 314 [2018-07-23 15:31:22,220 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-07-23 15:31:22,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-07-23 15:31:22,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2018-07-23 15:31:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-07-23 15:31:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 314 transitions. [2018-07-23 15:31:22,223 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 314 transitions. Word has length 311 [2018-07-23 15:31:22,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:22,223 INFO L471 AbstractCegarLoop]: Abstraction has 314 states and 314 transitions. [2018-07-23 15:31:22,223 INFO L472 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-07-23 15:31:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 314 transitions. [2018-07-23 15:31:22,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-07-23 15:31:22,224 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:22,224 INFO L353 BasicCegarLoop]: trace histogram [156, 155, 1, 1] [2018-07-23 15:31:22,224 INFO L414 AbstractCegarLoop]: === Iteration 156 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:22,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1520171350, now seen corresponding path program 155 times [2018-07-23 15:31:22,224 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24180 backedges. 0 proven. 24180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:22,964 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:22,964 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156] total 156 [2018-07-23 15:31:22,964 INFO L450 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-07-23 15:31:22,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-07-23 15:31:22,967 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:31:22,968 INFO L87 Difference]: Start difference. First operand 314 states and 314 transitions. Second operand 158 states. [2018-07-23 15:31:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:23,706 INFO L93 Difference]: Finished difference Result 317 states and 317 transitions. [2018-07-23 15:31:23,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-07-23 15:31:23,706 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 313 [2018-07-23 15:31:23,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:23,707 INFO L225 Difference]: With dead ends: 317 [2018-07-23 15:31:23,707 INFO L226 Difference]: Without dead ends: 316 [2018-07-23 15:31:23,708 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:31:23,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2018-07-23 15:31:23,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2018-07-23 15:31:23,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-07-23 15:31:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 316 transitions. [2018-07-23 15:31:23,713 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 316 transitions. Word has length 313 [2018-07-23 15:31:23,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:23,713 INFO L471 AbstractCegarLoop]: Abstraction has 316 states and 316 transitions. [2018-07-23 15:31:23,713 INFO L472 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-07-23 15:31:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 316 transitions. [2018-07-23 15:31:23,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-07-23 15:31:23,715 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:23,715 INFO L353 BasicCegarLoop]: trace histogram [157, 156, 1, 1] [2018-07-23 15:31:23,715 INFO L414 AbstractCegarLoop]: === Iteration 157 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:23,715 INFO L82 PathProgramCache]: Analyzing trace with hash 595787800, now seen corresponding path program 156 times [2018-07-23 15:31:23,715 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 24492 backedges. 0 proven. 24492 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:24,547 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:24,548 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157] total 157 [2018-07-23 15:31:24,548 INFO L450 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-07-23 15:31:24,550 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-07-23 15:31:24,551 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-07-23 15:31:24,551 INFO L87 Difference]: Start difference. First operand 316 states and 316 transitions. Second operand 159 states. [2018-07-23 15:31:24,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:24,911 INFO L93 Difference]: Finished difference Result 319 states and 319 transitions. [2018-07-23 15:31:24,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-07-23 15:31:24,911 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 315 [2018-07-23 15:31:24,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:24,912 INFO L225 Difference]: With dead ends: 319 [2018-07-23 15:31:24,912 INFO L226 Difference]: Without dead ends: 318 [2018-07-23 15:31:24,914 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-07-23 15:31:24,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-07-23 15:31:24,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2018-07-23 15:31:24,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2018-07-23 15:31:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 318 transitions. [2018-07-23 15:31:24,917 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 318 transitions. Word has length 315 [2018-07-23 15:31:24,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:24,917 INFO L471 AbstractCegarLoop]: Abstraction has 318 states and 318 transitions. [2018-07-23 15:31:24,917 INFO L472 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-07-23 15:31:24,917 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 318 transitions. [2018-07-23 15:31:24,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-07-23 15:31:24,918 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:24,918 INFO L353 BasicCegarLoop]: trace histogram [158, 157, 1, 1] [2018-07-23 15:31:24,918 INFO L414 AbstractCegarLoop]: === Iteration 158 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:24,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1321426522, now seen corresponding path program 157 times [2018-07-23 15:31:24,918 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 24806 backedges. 0 proven. 24806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:25,640 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:25,640 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158] total 158 [2018-07-23 15:31:25,640 INFO L450 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-07-23 15:31:25,642 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-07-23 15:31:25,643 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:31:25,643 INFO L87 Difference]: Start difference. First operand 318 states and 318 transitions. Second operand 160 states. [2018-07-23 15:31:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:26,390 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2018-07-23 15:31:26,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-07-23 15:31:26,391 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 317 [2018-07-23 15:31:26,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:26,391 INFO L225 Difference]: With dead ends: 321 [2018-07-23 15:31:26,391 INFO L226 Difference]: Without dead ends: 320 [2018-07-23 15:31:26,393 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:31:26,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2018-07-23 15:31:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2018-07-23 15:31:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-07-23 15:31:26,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 320 transitions. [2018-07-23 15:31:26,396 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 320 transitions. Word has length 317 [2018-07-23 15:31:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:26,397 INFO L471 AbstractCegarLoop]: Abstraction has 320 states and 320 transitions. [2018-07-23 15:31:26,397 INFO L472 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-07-23 15:31:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 320 transitions. [2018-07-23 15:31:26,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-07-23 15:31:26,398 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:26,398 INFO L353 BasicCegarLoop]: trace histogram [159, 158, 1, 1] [2018-07-23 15:31:26,398 INFO L414 AbstractCegarLoop]: === Iteration 159 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:26,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1419430884, now seen corresponding path program 158 times [2018-07-23 15:31:26,398 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25122 backedges. 0 proven. 25122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:27,252 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:27,253 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159] total 159 [2018-07-23 15:31:27,253 INFO L450 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-07-23 15:31:27,255 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-07-23 15:31:27,256 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-07-23 15:31:27,256 INFO L87 Difference]: Start difference. First operand 320 states and 320 transitions. Second operand 161 states. [2018-07-23 15:31:28,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:28,090 INFO L93 Difference]: Finished difference Result 323 states and 323 transitions. [2018-07-23 15:31:28,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-07-23 15:31:28,090 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 319 [2018-07-23 15:31:28,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:28,090 INFO L225 Difference]: With dead ends: 323 [2018-07-23 15:31:28,091 INFO L226 Difference]: Without dead ends: 322 [2018-07-23 15:31:28,092 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-07-23 15:31:28,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-07-23 15:31:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-07-23 15:31:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-07-23 15:31:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 322 transitions. [2018-07-23 15:31:28,096 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 322 transitions. Word has length 319 [2018-07-23 15:31:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:28,096 INFO L471 AbstractCegarLoop]: Abstraction has 322 states and 322 transitions. [2018-07-23 15:31:28,096 INFO L472 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-07-23 15:31:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 322 transitions. [2018-07-23 15:31:28,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-07-23 15:31:28,097 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:28,097 INFO L353 BasicCegarLoop]: trace histogram [160, 159, 1, 1] [2018-07-23 15:31:28,097 INFO L414 AbstractCegarLoop]: === Iteration 160 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:28,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1726521694, now seen corresponding path program 159 times [2018-07-23 15:31:28,097 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 25440 backedges. 0 proven. 25440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:28,831 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:28,831 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160] total 160 [2018-07-23 15:31:28,831 INFO L450 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-07-23 15:31:28,833 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-07-23 15:31:28,834 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-07-23 15:31:28,834 INFO L87 Difference]: Start difference. First operand 322 states and 322 transitions. Second operand 162 states. [2018-07-23 15:31:29,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:29,081 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2018-07-23 15:31:29,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-07-23 15:31:29,082 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 321 [2018-07-23 15:31:29,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:29,082 INFO L225 Difference]: With dead ends: 325 [2018-07-23 15:31:29,082 INFO L226 Difference]: Without dead ends: 324 [2018-07-23 15:31:29,084 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-07-23 15:31:29,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2018-07-23 15:31:29,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2018-07-23 15:31:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-07-23 15:31:29,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 324 transitions. [2018-07-23 15:31:29,087 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 324 transitions. Word has length 321 [2018-07-23 15:31:29,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:29,087 INFO L471 AbstractCegarLoop]: Abstraction has 324 states and 324 transitions. [2018-07-23 15:31:29,087 INFO L472 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-07-23 15:31:29,087 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 324 transitions. [2018-07-23 15:31:29,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-07-23 15:31:29,088 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:29,088 INFO L353 BasicCegarLoop]: trace histogram [161, 160, 1, 1] [2018-07-23 15:31:29,088 INFO L414 AbstractCegarLoop]: === Iteration 161 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:29,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1329972768, now seen corresponding path program 160 times [2018-07-23 15:31:29,089 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 25760 backedges. 0 proven. 25760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:29,850 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:29,851 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161] total 161 [2018-07-23 15:31:29,851 INFO L450 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-07-23 15:31:29,853 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-07-23 15:31:29,854 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:31:29,854 INFO L87 Difference]: Start difference. First operand 324 states and 324 transitions. Second operand 163 states. [2018-07-23 15:31:30,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:30,727 INFO L93 Difference]: Finished difference Result 327 states and 327 transitions. [2018-07-23 15:31:30,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-07-23 15:31:30,727 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 323 [2018-07-23 15:31:30,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:30,728 INFO L225 Difference]: With dead ends: 327 [2018-07-23 15:31:30,728 INFO L226 Difference]: Without dead ends: 326 [2018-07-23 15:31:30,730 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:31:30,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-07-23 15:31:30,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2018-07-23 15:31:30,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2018-07-23 15:31:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 326 transitions. [2018-07-23 15:31:30,733 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 326 transitions. Word has length 323 [2018-07-23 15:31:30,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:30,734 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 326 transitions. [2018-07-23 15:31:30,734 INFO L472 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-07-23 15:31:30,734 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 326 transitions. [2018-07-23 15:31:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-07-23 15:31:30,734 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:30,735 INFO L353 BasicCegarLoop]: trace histogram [162, 161, 1, 1] [2018-07-23 15:31:30,735 INFO L414 AbstractCegarLoop]: === Iteration 162 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:30,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1796423070, now seen corresponding path program 161 times [2018-07-23 15:31:30,735 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 26082 backedges. 0 proven. 26082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:31,547 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:31,547 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [162] total 162 [2018-07-23 15:31:31,547 INFO L450 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-07-23 15:31:31,550 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-07-23 15:31:31,552 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-07-23 15:31:31,552 INFO L87 Difference]: Start difference. First operand 326 states and 326 transitions. Second operand 164 states. [2018-07-23 15:31:32,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:32,456 INFO L93 Difference]: Finished difference Result 329 states and 329 transitions. [2018-07-23 15:31:32,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-07-23 15:31:32,456 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 325 [2018-07-23 15:31:32,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:32,457 INFO L225 Difference]: With dead ends: 329 [2018-07-23 15:31:32,457 INFO L226 Difference]: Without dead ends: 328 [2018-07-23 15:31:32,459 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-07-23 15:31:32,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-07-23 15:31:32,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2018-07-23 15:31:32,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-07-23 15:31:32,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-07-23 15:31:32,462 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 325 [2018-07-23 15:31:32,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:32,462 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-07-23 15:31:32,462 INFO L472 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-07-23 15:31:32,462 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-07-23 15:31:32,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-07-23 15:31:32,463 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:32,463 INFO L353 BasicCegarLoop]: trace histogram [163, 162, 1, 1] [2018-07-23 15:31:32,463 INFO L414 AbstractCegarLoop]: === Iteration 163 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:32,464 INFO L82 PathProgramCache]: Analyzing trace with hash 214283812, now seen corresponding path program 162 times [2018-07-23 15:31:32,464 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 26406 backedges. 0 proven. 26406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:33,265 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:33,265 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163] total 163 [2018-07-23 15:31:33,266 INFO L450 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-07-23 15:31:33,268 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-07-23 15:31:33,269 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-07-23 15:31:33,269 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 165 states. [2018-07-23 15:31:34,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:34,014 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2018-07-23 15:31:34,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-07-23 15:31:34,014 INFO L78 Accepts]: Start accepts. Automaton has 165 states. Word has length 327 [2018-07-23 15:31:34,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:34,014 INFO L225 Difference]: With dead ends: 331 [2018-07-23 15:31:34,014 INFO L226 Difference]: Without dead ends: 330 [2018-07-23 15:31:34,016 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-07-23 15:31:34,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2018-07-23 15:31:34,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2018-07-23 15:31:34,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2018-07-23 15:31:34,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 330 transitions. [2018-07-23 15:31:34,020 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 330 transitions. Word has length 327 [2018-07-23 15:31:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:34,020 INFO L471 AbstractCegarLoop]: Abstraction has 330 states and 330 transitions. [2018-07-23 15:31:34,020 INFO L472 AbstractCegarLoop]: Interpolant automaton has 165 states. [2018-07-23 15:31:34,021 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 330 transitions. [2018-07-23 15:31:34,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2018-07-23 15:31:34,021 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:34,022 INFO L353 BasicCegarLoop]: trace histogram [164, 163, 1, 1] [2018-07-23 15:31:34,022 INFO L414 AbstractCegarLoop]: === Iteration 164 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:34,022 INFO L82 PathProgramCache]: Analyzing trace with hash -231685786, now seen corresponding path program 163 times [2018-07-23 15:31:34,022 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 26732 backedges. 0 proven. 26732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:34,934 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:34,934 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164] total 164 [2018-07-23 15:31:34,934 INFO L450 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-07-23 15:31:34,936 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-07-23 15:31:34,938 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-07-23 15:31:34,938 INFO L87 Difference]: Start difference. First operand 330 states and 330 transitions. Second operand 166 states. [2018-07-23 15:31:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:35,273 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2018-07-23 15:31:35,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-07-23 15:31:35,273 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 329 [2018-07-23 15:31:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:35,274 INFO L225 Difference]: With dead ends: 333 [2018-07-23 15:31:35,274 INFO L226 Difference]: Without dead ends: 332 [2018-07-23 15:31:35,276 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-07-23 15:31:35,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2018-07-23 15:31:35,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2018-07-23 15:31:35,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-07-23 15:31:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 332 transitions. [2018-07-23 15:31:35,330 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 332 transitions. Word has length 329 [2018-07-23 15:31:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:35,330 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 332 transitions. [2018-07-23 15:31:35,330 INFO L472 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-07-23 15:31:35,331 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 332 transitions. [2018-07-23 15:31:35,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2018-07-23 15:31:35,332 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:35,332 INFO L353 BasicCegarLoop]: trace histogram [165, 164, 1, 1] [2018-07-23 15:31:35,332 INFO L414 AbstractCegarLoop]: === Iteration 165 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:35,332 INFO L82 PathProgramCache]: Analyzing trace with hash 688260136, now seen corresponding path program 164 times [2018-07-23 15:31:35,333 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 27060 backedges. 0 proven. 27060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:36,284 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:36,284 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165] total 165 [2018-07-23 15:31:36,284 INFO L450 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-07-23 15:31:36,286 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-07-23 15:31:36,287 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:31:36,287 INFO L87 Difference]: Start difference. First operand 332 states and 332 transitions. Second operand 167 states. [2018-07-23 15:31:36,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:36,711 INFO L93 Difference]: Finished difference Result 335 states and 335 transitions. [2018-07-23 15:31:36,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-07-23 15:31:36,711 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 331 [2018-07-23 15:31:36,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:36,712 INFO L225 Difference]: With dead ends: 335 [2018-07-23 15:31:36,712 INFO L226 Difference]: Without dead ends: 334 [2018-07-23 15:31:36,713 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:31:36,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2018-07-23 15:31:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2018-07-23 15:31:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2018-07-23 15:31:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 334 transitions. [2018-07-23 15:31:36,717 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 334 transitions. Word has length 331 [2018-07-23 15:31:36,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:36,717 INFO L471 AbstractCegarLoop]: Abstraction has 334 states and 334 transitions. [2018-07-23 15:31:36,717 INFO L472 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-07-23 15:31:36,717 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 334 transitions. [2018-07-23 15:31:36,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-07-23 15:31:36,718 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:36,718 INFO L353 BasicCegarLoop]: trace histogram [166, 165, 1, 1] [2018-07-23 15:31:36,718 INFO L414 AbstractCegarLoop]: === Iteration 166 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:36,718 INFO L82 PathProgramCache]: Analyzing trace with hash -6971798, now seen corresponding path program 165 times [2018-07-23 15:31:36,718 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 27390 backedges. 0 proven. 27390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:37,673 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:37,673 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [166] total 166 [2018-07-23 15:31:37,674 INFO L450 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-07-23 15:31:37,677 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-07-23 15:31:37,678 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-07-23 15:31:37,678 INFO L87 Difference]: Start difference. First operand 334 states and 334 transitions. Second operand 168 states. [2018-07-23 15:31:38,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:38,415 INFO L93 Difference]: Finished difference Result 337 states and 337 transitions. [2018-07-23 15:31:38,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-07-23 15:31:38,416 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 333 [2018-07-23 15:31:38,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:38,416 INFO L225 Difference]: With dead ends: 337 [2018-07-23 15:31:38,416 INFO L226 Difference]: Without dead ends: 336 [2018-07-23 15:31:38,418 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-07-23 15:31:38,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2018-07-23 15:31:38,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2018-07-23 15:31:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2018-07-23 15:31:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 336 transitions. [2018-07-23 15:31:38,421 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 336 transitions. Word has length 333 [2018-07-23 15:31:38,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:38,421 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 336 transitions. [2018-07-23 15:31:38,422 INFO L472 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-07-23 15:31:38,422 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 336 transitions. [2018-07-23 15:31:38,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2018-07-23 15:31:38,422 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:38,423 INFO L353 BasicCegarLoop]: trace histogram [167, 166, 1, 1] [2018-07-23 15:31:38,423 INFO L414 AbstractCegarLoop]: === Iteration 167 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:38,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1890037804, now seen corresponding path program 166 times [2018-07-23 15:31:38,423 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 27722 backedges. 0 proven. 27722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:39,289 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:39,289 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167] total 167 [2018-07-23 15:31:39,289 INFO L450 AbstractCegarLoop]: Interpolant automaton has 169 states [2018-07-23 15:31:39,290 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2018-07-23 15:31:39,291 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:31:39,291 INFO L87 Difference]: Start difference. First operand 336 states and 336 transitions. Second operand 169 states. [2018-07-23 15:31:40,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:40,161 INFO L93 Difference]: Finished difference Result 339 states and 339 transitions. [2018-07-23 15:31:40,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2018-07-23 15:31:40,161 INFO L78 Accepts]: Start accepts. Automaton has 169 states. Word has length 335 [2018-07-23 15:31:40,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:40,162 INFO L225 Difference]: With dead ends: 339 [2018-07-23 15:31:40,162 INFO L226 Difference]: Without dead ends: 338 [2018-07-23 15:31:40,163 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:31:40,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-07-23 15:31:40,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2018-07-23 15:31:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2018-07-23 15:31:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 338 transitions. [2018-07-23 15:31:40,166 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 338 transitions. Word has length 335 [2018-07-23 15:31:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:40,166 INFO L471 AbstractCegarLoop]: Abstraction has 338 states and 338 transitions. [2018-07-23 15:31:40,166 INFO L472 AbstractCegarLoop]: Interpolant automaton has 169 states. [2018-07-23 15:31:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 338 transitions. [2018-07-23 15:31:40,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-07-23 15:31:40,167 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:40,167 INFO L353 BasicCegarLoop]: trace histogram [168, 167, 1, 1] [2018-07-23 15:31:40,167 INFO L414 AbstractCegarLoop]: === Iteration 168 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:40,168 INFO L82 PathProgramCache]: Analyzing trace with hash -444835474, now seen corresponding path program 167 times [2018-07-23 15:31:40,168 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 28056 backedges. 0 proven. 28056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:41,061 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:41,061 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [168] total 168 [2018-07-23 15:31:41,062 INFO L450 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-07-23 15:31:41,064 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-07-23 15:31:41,065 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-07-23 15:31:41,065 INFO L87 Difference]: Start difference. First operand 338 states and 338 transitions. Second operand 170 states. [2018-07-23 15:31:42,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:42,025 INFO L93 Difference]: Finished difference Result 341 states and 341 transitions. [2018-07-23 15:31:42,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2018-07-23 15:31:42,025 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 337 [2018-07-23 15:31:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:42,026 INFO L225 Difference]: With dead ends: 341 [2018-07-23 15:31:42,026 INFO L226 Difference]: Without dead ends: 340 [2018-07-23 15:31:42,027 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-07-23 15:31:42,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2018-07-23 15:31:42,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2018-07-23 15:31:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-07-23 15:31:42,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 340 transitions. [2018-07-23 15:31:42,031 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 340 transitions. Word has length 337 [2018-07-23 15:31:42,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:42,031 INFO L471 AbstractCegarLoop]: Abstraction has 340 states and 340 transitions. [2018-07-23 15:31:42,031 INFO L472 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-07-23 15:31:42,031 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 340 transitions. [2018-07-23 15:31:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-07-23 15:31:42,032 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:42,032 INFO L353 BasicCegarLoop]: trace histogram [169, 168, 1, 1] [2018-07-23 15:31:42,032 INFO L414 AbstractCegarLoop]: === Iteration 169 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:42,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2009840176, now seen corresponding path program 168 times [2018-07-23 15:31:42,032 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 28392 backedges. 0 proven. 28392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:42,877 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:42,878 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [169] total 169 [2018-07-23 15:31:42,878 INFO L450 AbstractCegarLoop]: Interpolant automaton has 171 states [2018-07-23 15:31:42,880 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2018-07-23 15:31:42,881 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-07-23 15:31:42,881 INFO L87 Difference]: Start difference. First operand 340 states and 340 transitions. Second operand 171 states. [2018-07-23 15:31:43,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:43,859 INFO L93 Difference]: Finished difference Result 343 states and 343 transitions. [2018-07-23 15:31:43,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2018-07-23 15:31:43,859 INFO L78 Accepts]: Start accepts. Automaton has 171 states. Word has length 339 [2018-07-23 15:31:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:43,859 INFO L225 Difference]: With dead ends: 343 [2018-07-23 15:31:43,859 INFO L226 Difference]: Without dead ends: 342 [2018-07-23 15:31:43,861 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-07-23 15:31:43,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2018-07-23 15:31:43,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2018-07-23 15:31:43,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2018-07-23 15:31:43,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 342 transitions. [2018-07-23 15:31:43,865 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 342 transitions. Word has length 339 [2018-07-23 15:31:43,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:43,865 INFO L471 AbstractCegarLoop]: Abstraction has 342 states and 342 transitions. [2018-07-23 15:31:43,865 INFO L472 AbstractCegarLoop]: Interpolant automaton has 171 states. [2018-07-23 15:31:43,865 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 342 transitions. [2018-07-23 15:31:43,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-07-23 15:31:43,866 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:43,866 INFO L353 BasicCegarLoop]: trace histogram [170, 169, 1, 1] [2018-07-23 15:31:43,866 INFO L414 AbstractCegarLoop]: === Iteration 170 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:43,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1278872974, now seen corresponding path program 169 times [2018-07-23 15:31:43,866 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 28730 backedges. 0 proven. 28730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:44,833 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:44,833 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [170] total 170 [2018-07-23 15:31:44,834 INFO L450 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-07-23 15:31:44,836 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-07-23 15:31:44,837 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-07-23 15:31:44,837 INFO L87 Difference]: Start difference. First operand 342 states and 342 transitions. Second operand 172 states. [2018-07-23 15:31:45,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:45,803 INFO L93 Difference]: Finished difference Result 345 states and 345 transitions. [2018-07-23 15:31:45,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2018-07-23 15:31:45,803 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 341 [2018-07-23 15:31:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:45,803 INFO L225 Difference]: With dead ends: 345 [2018-07-23 15:31:45,804 INFO L226 Difference]: Without dead ends: 344 [2018-07-23 15:31:45,806 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-07-23 15:31:45,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2018-07-23 15:31:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2018-07-23 15:31:45,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2018-07-23 15:31:45,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 344 transitions. [2018-07-23 15:31:45,810 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 344 transitions. Word has length 341 [2018-07-23 15:31:45,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:45,811 INFO L471 AbstractCegarLoop]: Abstraction has 344 states and 344 transitions. [2018-07-23 15:31:45,811 INFO L472 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-07-23 15:31:45,811 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 344 transitions. [2018-07-23 15:31:45,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-07-23 15:31:45,812 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:45,813 INFO L353 BasicCegarLoop]: trace histogram [171, 170, 1, 1] [2018-07-23 15:31:45,813 INFO L414 AbstractCegarLoop]: === Iteration 171 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:45,813 INFO L82 PathProgramCache]: Analyzing trace with hash -636280268, now seen corresponding path program 170 times [2018-07-23 15:31:45,813 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 29070 backedges. 0 proven. 29070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:46,688 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:46,688 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [171] total 171 [2018-07-23 15:31:46,688 INFO L450 AbstractCegarLoop]: Interpolant automaton has 173 states [2018-07-23 15:31:46,691 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2018-07-23 15:31:46,694 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-07-23 15:31:46,694 INFO L87 Difference]: Start difference. First operand 344 states and 344 transitions. Second operand 173 states. [2018-07-23 15:31:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:47,715 INFO L93 Difference]: Finished difference Result 347 states and 347 transitions. [2018-07-23 15:31:47,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2018-07-23 15:31:47,715 INFO L78 Accepts]: Start accepts. Automaton has 173 states. Word has length 343 [2018-07-23 15:31:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:47,716 INFO L225 Difference]: With dead ends: 347 [2018-07-23 15:31:47,716 INFO L226 Difference]: Without dead ends: 346 [2018-07-23 15:31:47,718 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-07-23 15:31:47,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2018-07-23 15:31:47,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2018-07-23 15:31:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2018-07-23 15:31:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 346 transitions. [2018-07-23 15:31:47,721 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 346 transitions. Word has length 343 [2018-07-23 15:31:47,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:47,721 INFO L471 AbstractCegarLoop]: Abstraction has 346 states and 346 transitions. [2018-07-23 15:31:47,721 INFO L472 AbstractCegarLoop]: Interpolant automaton has 173 states. [2018-07-23 15:31:47,721 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 346 transitions. [2018-07-23 15:31:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2018-07-23 15:31:47,722 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:47,722 INFO L353 BasicCegarLoop]: trace histogram [172, 171, 1, 1] [2018-07-23 15:31:47,722 INFO L414 AbstractCegarLoop]: === Iteration 172 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:47,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1579980426, now seen corresponding path program 171 times [2018-07-23 15:31:47,723 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 29412 backedges. 0 proven. 29412 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:48,759 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:48,759 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [172] total 172 [2018-07-23 15:31:48,759 INFO L450 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-07-23 15:31:48,760 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-07-23 15:31:48,761 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-07-23 15:31:48,761 INFO L87 Difference]: Start difference. First operand 346 states and 346 transitions. Second operand 174 states. [2018-07-23 15:31:49,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:49,421 INFO L93 Difference]: Finished difference Result 349 states and 349 transitions. [2018-07-23 15:31:49,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2018-07-23 15:31:49,421 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 345 [2018-07-23 15:31:49,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:49,422 INFO L225 Difference]: With dead ends: 349 [2018-07-23 15:31:49,422 INFO L226 Difference]: Without dead ends: 348 [2018-07-23 15:31:49,423 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-07-23 15:31:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-07-23 15:31:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2018-07-23 15:31:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-07-23 15:31:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 348 transitions. [2018-07-23 15:31:49,428 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 348 transitions. Word has length 345 [2018-07-23 15:31:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:49,428 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 348 transitions. [2018-07-23 15:31:49,428 INFO L472 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-07-23 15:31:49,428 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 348 transitions. [2018-07-23 15:31:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-07-23 15:31:49,430 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:49,430 INFO L353 BasicCegarLoop]: trace histogram [173, 172, 1, 1] [2018-07-23 15:31:49,430 INFO L414 AbstractCegarLoop]: === Iteration 173 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:49,430 INFO L82 PathProgramCache]: Analyzing trace with hash 2057234488, now seen corresponding path program 172 times [2018-07-23 15:31:49,430 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 29756 backedges. 0 proven. 29756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:50,420 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:50,420 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [173] total 173 [2018-07-23 15:31:50,420 INFO L450 AbstractCegarLoop]: Interpolant automaton has 175 states [2018-07-23 15:31:50,422 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2018-07-23 15:31:50,423 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:31:50,424 INFO L87 Difference]: Start difference. First operand 348 states and 348 transitions. Second operand 175 states. [2018-07-23 15:31:50,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:50,806 INFO L93 Difference]: Finished difference Result 351 states and 351 transitions. [2018-07-23 15:31:50,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2018-07-23 15:31:50,806 INFO L78 Accepts]: Start accepts. Automaton has 175 states. Word has length 347 [2018-07-23 15:31:50,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:50,806 INFO L225 Difference]: With dead ends: 351 [2018-07-23 15:31:50,806 INFO L226 Difference]: Without dead ends: 350 [2018-07-23 15:31:50,808 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:31:50,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-07-23 15:31:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 350. [2018-07-23 15:31:50,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2018-07-23 15:31:50,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 350 transitions. [2018-07-23 15:31:50,812 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 350 transitions. Word has length 347 [2018-07-23 15:31:50,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:50,812 INFO L471 AbstractCegarLoop]: Abstraction has 350 states and 350 transitions. [2018-07-23 15:31:50,812 INFO L472 AbstractCegarLoop]: Interpolant automaton has 175 states. [2018-07-23 15:31:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 350 transitions. [2018-07-23 15:31:50,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-07-23 15:31:50,813 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:50,813 INFO L353 BasicCegarLoop]: trace histogram [174, 173, 1, 1] [2018-07-23 15:31:50,813 INFO L414 AbstractCegarLoop]: === Iteration 174 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:50,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1317387898, now seen corresponding path program 173 times [2018-07-23 15:31:50,813 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30102 backedges. 0 proven. 30102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:51,739 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:51,739 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [174] total 174 [2018-07-23 15:31:51,739 INFO L450 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-07-23 15:31:51,742 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-07-23 15:31:51,743 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15400, Invalid=15400, Unknown=0, NotChecked=0, Total=30800 [2018-07-23 15:31:51,744 INFO L87 Difference]: Start difference. First operand 350 states and 350 transitions. Second operand 176 states. [2018-07-23 15:31:52,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:52,198 INFO L93 Difference]: Finished difference Result 353 states and 353 transitions. [2018-07-23 15:31:52,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2018-07-23 15:31:52,198 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 349 [2018-07-23 15:31:52,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:52,199 INFO L225 Difference]: With dead ends: 353 [2018-07-23 15:31:52,199 INFO L226 Difference]: Without dead ends: 352 [2018-07-23 15:31:52,201 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15400, Invalid=15400, Unknown=0, NotChecked=0, Total=30800 [2018-07-23 15:31:52,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2018-07-23 15:31:52,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2018-07-23 15:31:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-07-23 15:31:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2018-07-23 15:31:52,204 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 349 [2018-07-23 15:31:52,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:52,205 INFO L471 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2018-07-23 15:31:52,205 INFO L472 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-07-23 15:31:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2018-07-23 15:31:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-07-23 15:31:52,206 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:52,206 INFO L353 BasicCegarLoop]: trace histogram [175, 174, 1, 1] [2018-07-23 15:31:52,206 INFO L414 AbstractCegarLoop]: === Iteration 175 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:52,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1005581252, now seen corresponding path program 174 times [2018-07-23 15:31:52,207 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 30450 backedges. 0 proven. 30450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:53,178 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:53,178 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [175] total 175 [2018-07-23 15:31:53,178 INFO L450 AbstractCegarLoop]: Interpolant automaton has 177 states [2018-07-23 15:31:53,180 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2018-07-23 15:31:53,182 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2018-07-23 15:31:53,182 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 177 states. [2018-07-23 15:31:54,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:54,220 INFO L93 Difference]: Finished difference Result 355 states and 355 transitions. [2018-07-23 15:31:54,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2018-07-23 15:31:54,221 INFO L78 Accepts]: Start accepts. Automaton has 177 states. Word has length 351 [2018-07-23 15:31:54,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:54,221 INFO L225 Difference]: With dead ends: 355 [2018-07-23 15:31:54,221 INFO L226 Difference]: Without dead ends: 354 [2018-07-23 15:31:54,223 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2018-07-23 15:31:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2018-07-23 15:31:54,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2018-07-23 15:31:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2018-07-23 15:31:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 354 transitions. [2018-07-23 15:31:54,226 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 354 transitions. Word has length 351 [2018-07-23 15:31:54,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:54,227 INFO L471 AbstractCegarLoop]: Abstraction has 354 states and 354 transitions. [2018-07-23 15:31:54,227 INFO L472 AbstractCegarLoop]: Interpolant automaton has 177 states. [2018-07-23 15:31:54,227 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 354 transitions. [2018-07-23 15:31:54,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-07-23 15:31:54,228 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:54,228 INFO L353 BasicCegarLoop]: trace histogram [176, 175, 1, 1] [2018-07-23 15:31:54,228 INFO L414 AbstractCegarLoop]: === Iteration 176 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:54,228 INFO L82 PathProgramCache]: Analyzing trace with hash 4059518, now seen corresponding path program 175 times [2018-07-23 15:31:54,228 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 30800 backedges. 0 proven. 30800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:55,161 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:55,162 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [176] total 176 [2018-07-23 15:31:55,162 INFO L450 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-07-23 15:31:55,164 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-07-23 15:31:55,165 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15753, Invalid=15753, Unknown=0, NotChecked=0, Total=31506 [2018-07-23 15:31:55,165 INFO L87 Difference]: Start difference. First operand 354 states and 354 transitions. Second operand 178 states. [2018-07-23 15:31:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:56,474 INFO L93 Difference]: Finished difference Result 357 states and 357 transitions. [2018-07-23 15:31:56,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2018-07-23 15:31:56,475 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 353 [2018-07-23 15:31:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:56,475 INFO L225 Difference]: With dead ends: 357 [2018-07-23 15:31:56,475 INFO L226 Difference]: Without dead ends: 356 [2018-07-23 15:31:56,477 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15753, Invalid=15753, Unknown=0, NotChecked=0, Total=31506 [2018-07-23 15:31:56,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2018-07-23 15:31:56,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2018-07-23 15:31:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2018-07-23 15:31:56,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 356 transitions. [2018-07-23 15:31:56,481 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 356 transitions. Word has length 353 [2018-07-23 15:31:56,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:56,481 INFO L471 AbstractCegarLoop]: Abstraction has 356 states and 356 transitions. [2018-07-23 15:31:56,481 INFO L472 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-07-23 15:31:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 356 transitions. [2018-07-23 15:31:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2018-07-23 15:31:56,482 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:56,482 INFO L353 BasicCegarLoop]: trace histogram [177, 176, 1, 1] [2018-07-23 15:31:56,482 INFO L414 AbstractCegarLoop]: === Iteration 177 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:56,482 INFO L82 PathProgramCache]: Analyzing trace with hash -393769408, now seen corresponding path program 176 times [2018-07-23 15:31:56,482 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 31152 backedges. 0 proven. 31152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:57,466 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:57,466 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [177] total 177 [2018-07-23 15:31:57,467 INFO L450 AbstractCegarLoop]: Interpolant automaton has 179 states [2018-07-23 15:31:57,468 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2018-07-23 15:31:57,469 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15931, Invalid=15931, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:31:57,469 INFO L87 Difference]: Start difference. First operand 356 states and 356 transitions. Second operand 179 states. [2018-07-23 15:31:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:58,230 INFO L93 Difference]: Finished difference Result 359 states and 359 transitions. [2018-07-23 15:31:58,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2018-07-23 15:31:58,231 INFO L78 Accepts]: Start accepts. Automaton has 179 states. Word has length 355 [2018-07-23 15:31:58,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:58,231 INFO L225 Difference]: With dead ends: 359 [2018-07-23 15:31:58,231 INFO L226 Difference]: Without dead ends: 358 [2018-07-23 15:31:58,232 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15931, Invalid=15931, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:31:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2018-07-23 15:31:58,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2018-07-23 15:31:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2018-07-23 15:31:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 358 transitions. [2018-07-23 15:31:58,236 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 358 transitions. Word has length 355 [2018-07-23 15:31:58,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:58,236 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 358 transitions. [2018-07-23 15:31:58,236 INFO L472 AbstractCegarLoop]: Interpolant automaton has 179 states. [2018-07-23 15:31:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 358 transitions. [2018-07-23 15:31:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-07-23 15:31:58,237 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:58,237 INFO L353 BasicCegarLoop]: trace histogram [178, 177, 1, 1] [2018-07-23 15:31:58,237 INFO L414 AbstractCegarLoop]: === Iteration 178 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:58,237 INFO L82 PathProgramCache]: Analyzing trace with hash -455277950, now seen corresponding path program 177 times [2018-07-23 15:31:58,237 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 31506 backedges. 0 proven. 31506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:59,200 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:59,200 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [178] total 178 [2018-07-23 15:31:59,201 INFO L450 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-07-23 15:31:59,203 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-07-23 15:31:59,205 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16110, Invalid=16110, Unknown=0, NotChecked=0, Total=32220 [2018-07-23 15:31:59,205 INFO L87 Difference]: Start difference. First operand 358 states and 358 transitions. Second operand 180 states. [2018-07-23 15:31:59,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:59,750 INFO L93 Difference]: Finished difference Result 361 states and 361 transitions. [2018-07-23 15:31:59,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2018-07-23 15:31:59,750 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 357 [2018-07-23 15:31:59,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:59,751 INFO L225 Difference]: With dead ends: 361 [2018-07-23 15:31:59,751 INFO L226 Difference]: Without dead ends: 360 [2018-07-23 15:31:59,755 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=16110, Invalid=16110, Unknown=0, NotChecked=0, Total=32220 [2018-07-23 15:31:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2018-07-23 15:31:59,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2018-07-23 15:31:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2018-07-23 15:31:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 360 transitions. [2018-07-23 15:31:59,760 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 360 transitions. Word has length 357 [2018-07-23 15:31:59,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:59,760 INFO L471 AbstractCegarLoop]: Abstraction has 360 states and 360 transitions. [2018-07-23 15:31:59,760 INFO L472 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-07-23 15:31:59,761 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 360 transitions. [2018-07-23 15:31:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-07-23 15:31:59,762 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:59,762 INFO L353 BasicCegarLoop]: trace histogram [179, 178, 1, 1] [2018-07-23 15:31:59,762 INFO L414 AbstractCegarLoop]: === Iteration 179 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:31:59,762 INFO L82 PathProgramCache]: Analyzing trace with hash 564555332, now seen corresponding path program 178 times [2018-07-23 15:31:59,763 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 31862 backedges. 0 proven. 31862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:00,793 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:00,793 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [179] total 179 [2018-07-23 15:32:00,793 INFO L450 AbstractCegarLoop]: Interpolant automaton has 181 states [2018-07-23 15:32:00,796 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2018-07-23 15:32:00,797 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16290, Invalid=16290, Unknown=0, NotChecked=0, Total=32580 [2018-07-23 15:32:00,797 INFO L87 Difference]: Start difference. First operand 360 states and 360 transitions. Second operand 181 states. [2018-07-23 15:32:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:01,953 INFO L93 Difference]: Finished difference Result 363 states and 363 transitions. [2018-07-23 15:32:01,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2018-07-23 15:32:01,953 INFO L78 Accepts]: Start accepts. Automaton has 181 states. Word has length 359 [2018-07-23 15:32:01,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:01,954 INFO L225 Difference]: With dead ends: 363 [2018-07-23 15:32:01,954 INFO L226 Difference]: Without dead ends: 362 [2018-07-23 15:32:01,955 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=16290, Invalid=16290, Unknown=0, NotChecked=0, Total=32580 [2018-07-23 15:32:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-07-23 15:32:01,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2018-07-23 15:32:01,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2018-07-23 15:32:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 362 transitions. [2018-07-23 15:32:01,960 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 362 transitions. Word has length 359 [2018-07-23 15:32:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:01,961 INFO L471 AbstractCegarLoop]: Abstraction has 362 states and 362 transitions. [2018-07-23 15:32:01,961 INFO L472 AbstractCegarLoop]: Interpolant automaton has 181 states. [2018-07-23 15:32:01,961 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 362 transitions. [2018-07-23 15:32:01,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2018-07-23 15:32:01,962 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:01,962 INFO L353 BasicCegarLoop]: trace histogram [180, 179, 1, 1] [2018-07-23 15:32:01,963 INFO L414 AbstractCegarLoop]: === Iteration 180 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:01,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1371795846, now seen corresponding path program 179 times [2018-07-23 15:32:01,963 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 32220 backedges. 0 proven. 32220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:02,953 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:02,953 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [180] total 180 [2018-07-23 15:32:02,953 INFO L450 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-07-23 15:32:02,956 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-07-23 15:32:02,957 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16471, Invalid=16471, Unknown=0, NotChecked=0, Total=32942 [2018-07-23 15:32:02,957 INFO L87 Difference]: Start difference. First operand 362 states and 362 transitions. Second operand 182 states. [2018-07-23 15:32:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:03,777 INFO L93 Difference]: Finished difference Result 365 states and 365 transitions. [2018-07-23 15:32:03,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2018-07-23 15:32:03,778 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 361 [2018-07-23 15:32:03,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:03,778 INFO L225 Difference]: With dead ends: 365 [2018-07-23 15:32:03,778 INFO L226 Difference]: Without dead ends: 364 [2018-07-23 15:32:03,781 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=16471, Invalid=16471, Unknown=0, NotChecked=0, Total=32942 [2018-07-23 15:32:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2018-07-23 15:32:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2018-07-23 15:32:03,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-07-23 15:32:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 364 transitions. [2018-07-23 15:32:03,784 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 364 transitions. Word has length 361 [2018-07-23 15:32:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:03,785 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 364 transitions. [2018-07-23 15:32:03,785 INFO L472 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-07-23 15:32:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 364 transitions. [2018-07-23 15:32:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-07-23 15:32:03,786 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:03,786 INFO L353 BasicCegarLoop]: trace histogram [181, 180, 1, 1] [2018-07-23 15:32:03,786 INFO L414 AbstractCegarLoop]: === Iteration 181 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:03,786 INFO L82 PathProgramCache]: Analyzing trace with hash -259150776, now seen corresponding path program 180 times [2018-07-23 15:32:03,786 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 32580 backedges. 0 proven. 32580 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:04,959 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:04,959 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [181] total 181 [2018-07-23 15:32:04,960 INFO L450 AbstractCegarLoop]: Interpolant automaton has 183 states [2018-07-23 15:32:04,962 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2018-07-23 15:32:04,963 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16653, Invalid=16653, Unknown=0, NotChecked=0, Total=33306 [2018-07-23 15:32:04,964 INFO L87 Difference]: Start difference. First operand 364 states and 364 transitions. Second operand 183 states. [2018-07-23 15:32:05,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:05,838 INFO L93 Difference]: Finished difference Result 367 states and 367 transitions. [2018-07-23 15:32:05,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2018-07-23 15:32:05,839 INFO L78 Accepts]: Start accepts. Automaton has 183 states. Word has length 363 [2018-07-23 15:32:05,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:05,839 INFO L225 Difference]: With dead ends: 367 [2018-07-23 15:32:05,839 INFO L226 Difference]: Without dead ends: 366 [2018-07-23 15:32:05,842 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=16653, Invalid=16653, Unknown=0, NotChecked=0, Total=33306 [2018-07-23 15:32:05,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2018-07-23 15:32:05,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 366. [2018-07-23 15:32:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2018-07-23 15:32:05,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 366 transitions. [2018-07-23 15:32:05,845 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 366 transitions. Word has length 363 [2018-07-23 15:32:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:05,845 INFO L471 AbstractCegarLoop]: Abstraction has 366 states and 366 transitions. [2018-07-23 15:32:05,845 INFO L472 AbstractCegarLoop]: Interpolant automaton has 183 states. [2018-07-23 15:32:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 366 transitions. [2018-07-23 15:32:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2018-07-23 15:32:05,846 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:05,846 INFO L353 BasicCegarLoop]: trace histogram [182, 181, 1, 1] [2018-07-23 15:32:05,847 INFO L414 AbstractCegarLoop]: === Iteration 182 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:05,847 INFO L82 PathProgramCache]: Analyzing trace with hash 64208522, now seen corresponding path program 181 times [2018-07-23 15:32:05,847 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 32942 backedges. 0 proven. 32942 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:06,911 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:06,911 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [182] total 182 [2018-07-23 15:32:06,911 INFO L450 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-07-23 15:32:06,914 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-07-23 15:32:06,916 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16836, Invalid=16836, Unknown=0, NotChecked=0, Total=33672 [2018-07-23 15:32:06,916 INFO L87 Difference]: Start difference. First operand 366 states and 366 transitions. Second operand 184 states. [2018-07-23 15:32:08,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:08,593 INFO L93 Difference]: Finished difference Result 369 states and 369 transitions. [2018-07-23 15:32:08,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2018-07-23 15:32:08,593 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 365 [2018-07-23 15:32:08,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:08,594 INFO L225 Difference]: With dead ends: 369 [2018-07-23 15:32:08,594 INFO L226 Difference]: Without dead ends: 368 [2018-07-23 15:32:08,597 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=16836, Invalid=16836, Unknown=0, NotChecked=0, Total=33672 [2018-07-23 15:32:08,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2018-07-23 15:32:08,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2018-07-23 15:32:08,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2018-07-23 15:32:08,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 368 transitions. [2018-07-23 15:32:08,601 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 368 transitions. Word has length 365 [2018-07-23 15:32:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:08,601 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 368 transitions. [2018-07-23 15:32:08,601 INFO L472 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-07-23 15:32:08,601 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 368 transitions. [2018-07-23 15:32:08,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2018-07-23 15:32:08,603 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:08,603 INFO L353 BasicCegarLoop]: trace histogram [183, 182, 1, 1] [2018-07-23 15:32:08,603 INFO L414 AbstractCegarLoop]: === Iteration 183 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:08,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1574848588, now seen corresponding path program 182 times [2018-07-23 15:32:08,603 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 33306 backedges. 0 proven. 33306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:09,808 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:09,809 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [183] total 183 [2018-07-23 15:32:09,809 INFO L450 AbstractCegarLoop]: Interpolant automaton has 185 states [2018-07-23 15:32:09,812 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2018-07-23 15:32:09,813 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17020, Invalid=17020, Unknown=0, NotChecked=0, Total=34040 [2018-07-23 15:32:09,814 INFO L87 Difference]: Start difference. First operand 368 states and 368 transitions. Second operand 185 states. [2018-07-23 15:32:10,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:10,491 INFO L93 Difference]: Finished difference Result 371 states and 371 transitions. [2018-07-23 15:32:10,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2018-07-23 15:32:10,491 INFO L78 Accepts]: Start accepts. Automaton has 185 states. Word has length 367 [2018-07-23 15:32:10,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:10,492 INFO L225 Difference]: With dead ends: 371 [2018-07-23 15:32:10,492 INFO L226 Difference]: Without dead ends: 370 [2018-07-23 15:32:10,494 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17020, Invalid=17020, Unknown=0, NotChecked=0, Total=34040 [2018-07-23 15:32:10,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2018-07-23 15:32:10,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2018-07-23 15:32:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2018-07-23 15:32:10,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 370 transitions. [2018-07-23 15:32:10,498 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 370 transitions. Word has length 367 [2018-07-23 15:32:10,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:10,498 INFO L471 AbstractCegarLoop]: Abstraction has 370 states and 370 transitions. [2018-07-23 15:32:10,498 INFO L472 AbstractCegarLoop]: Interpolant automaton has 185 states. [2018-07-23 15:32:10,498 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 370 transitions. [2018-07-23 15:32:10,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2018-07-23 15:32:10,499 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:10,500 INFO L353 BasicCegarLoop]: trace histogram [184, 183, 1, 1] [2018-07-23 15:32:10,500 INFO L414 AbstractCegarLoop]: === Iteration 184 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:10,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1601005966, now seen corresponding path program 183 times [2018-07-23 15:32:10,500 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 33672 backedges. 0 proven. 33672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:11,727 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:11,727 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [184] total 184 [2018-07-23 15:32:11,727 INFO L450 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-07-23 15:32:11,730 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-07-23 15:32:11,733 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17205, Invalid=17205, Unknown=0, NotChecked=0, Total=34410 [2018-07-23 15:32:11,733 INFO L87 Difference]: Start difference. First operand 370 states and 370 transitions. Second operand 186 states. [2018-07-23 15:32:13,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:13,095 INFO L93 Difference]: Finished difference Result 373 states and 373 transitions. [2018-07-23 15:32:13,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2018-07-23 15:32:13,095 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 369 [2018-07-23 15:32:13,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:13,096 INFO L225 Difference]: With dead ends: 373 [2018-07-23 15:32:13,096 INFO L226 Difference]: Without dead ends: 372 [2018-07-23 15:32:13,099 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17205, Invalid=17205, Unknown=0, NotChecked=0, Total=34410 [2018-07-23 15:32:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2018-07-23 15:32:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2018-07-23 15:32:13,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2018-07-23 15:32:13,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 372 transitions. [2018-07-23 15:32:13,103 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 372 transitions. Word has length 369 [2018-07-23 15:32:13,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:13,103 INFO L471 AbstractCegarLoop]: Abstraction has 372 states and 372 transitions. [2018-07-23 15:32:13,103 INFO L472 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-07-23 15:32:13,103 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 372 transitions. [2018-07-23 15:32:13,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2018-07-23 15:32:13,104 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:13,104 INFO L353 BasicCegarLoop]: trace histogram [185, 184, 1, 1] [2018-07-23 15:32:13,105 INFO L414 AbstractCegarLoop]: === Iteration 185 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:13,105 INFO L82 PathProgramCache]: Analyzing trace with hash 968442448, now seen corresponding path program 184 times [2018-07-23 15:32:13,105 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 34040 backedges. 0 proven. 34040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:14,215 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:14,215 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [185] total 185 [2018-07-23 15:32:14,216 INFO L450 AbstractCegarLoop]: Interpolant automaton has 187 states [2018-07-23 15:32:14,218 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 187 interpolants. [2018-07-23 15:32:14,219 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17391, Invalid=17391, Unknown=0, NotChecked=0, Total=34782 [2018-07-23 15:32:14,220 INFO L87 Difference]: Start difference. First operand 372 states and 372 transitions. Second operand 187 states. [2018-07-23 15:32:15,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:15,066 INFO L93 Difference]: Finished difference Result 375 states and 375 transitions. [2018-07-23 15:32:15,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2018-07-23 15:32:15,067 INFO L78 Accepts]: Start accepts. Automaton has 187 states. Word has length 371 [2018-07-23 15:32:15,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:15,067 INFO L225 Difference]: With dead ends: 375 [2018-07-23 15:32:15,067 INFO L226 Difference]: Without dead ends: 374 [2018-07-23 15:32:15,069 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17391, Invalid=17391, Unknown=0, NotChecked=0, Total=34782 [2018-07-23 15:32:15,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-07-23 15:32:15,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2018-07-23 15:32:15,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2018-07-23 15:32:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 374 transitions. [2018-07-23 15:32:15,073 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 374 transitions. Word has length 371 [2018-07-23 15:32:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:15,073 INFO L471 AbstractCegarLoop]: Abstraction has 374 states and 374 transitions. [2018-07-23 15:32:15,073 INFO L472 AbstractCegarLoop]: Interpolant automaton has 187 states. [2018-07-23 15:32:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 374 transitions. [2018-07-23 15:32:15,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-07-23 15:32:15,074 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:15,074 INFO L353 BasicCegarLoop]: trace histogram [186, 185, 1, 1] [2018-07-23 15:32:15,074 INFO L414 AbstractCegarLoop]: === Iteration 186 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:15,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1334709614, now seen corresponding path program 185 times [2018-07-23 15:32:15,075 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 34410 backedges. 0 proven. 34410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:16,307 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:16,307 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [186] total 186 [2018-07-23 15:32:16,307 INFO L450 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-07-23 15:32:16,309 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-07-23 15:32:16,311 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17578, Invalid=17578, Unknown=0, NotChecked=0, Total=35156 [2018-07-23 15:32:16,311 INFO L87 Difference]: Start difference. First operand 374 states and 374 transitions. Second operand 188 states. [2018-07-23 15:32:17,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:17,212 INFO L93 Difference]: Finished difference Result 377 states and 377 transitions. [2018-07-23 15:32:17,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2018-07-23 15:32:17,212 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 373 [2018-07-23 15:32:17,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:17,212 INFO L225 Difference]: With dead ends: 377 [2018-07-23 15:32:17,213 INFO L226 Difference]: Without dead ends: 376 [2018-07-23 15:32:17,214 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17578, Invalid=17578, Unknown=0, NotChecked=0, Total=35156 [2018-07-23 15:32:17,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2018-07-23 15:32:17,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2018-07-23 15:32:17,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-07-23 15:32:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2018-07-23 15:32:17,218 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 373 [2018-07-23 15:32:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:17,218 INFO L471 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2018-07-23 15:32:17,218 INFO L472 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-07-23 15:32:17,218 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2018-07-23 15:32:17,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-07-23 15:32:17,219 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:17,219 INFO L353 BasicCegarLoop]: trace histogram [187, 186, 1, 1] [2018-07-23 15:32:17,219 INFO L414 AbstractCegarLoop]: === Iteration 187 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:17,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1539283540, now seen corresponding path program 186 times [2018-07-23 15:32:17,220 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 34782 backedges. 0 proven. 34782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:18,331 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:18,331 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [187] total 187 [2018-07-23 15:32:18,331 INFO L450 AbstractCegarLoop]: Interpolant automaton has 189 states [2018-07-23 15:32:18,334 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2018-07-23 15:32:18,336 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17766, Invalid=17766, Unknown=0, NotChecked=0, Total=35532 [2018-07-23 15:32:18,336 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand 189 states. [2018-07-23 15:32:19,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:19,986 INFO L93 Difference]: Finished difference Result 379 states and 379 transitions. [2018-07-23 15:32:19,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2018-07-23 15:32:19,986 INFO L78 Accepts]: Start accepts. Automaton has 189 states. Word has length 375 [2018-07-23 15:32:19,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:19,987 INFO L225 Difference]: With dead ends: 379 [2018-07-23 15:32:19,987 INFO L226 Difference]: Without dead ends: 378 [2018-07-23 15:32:19,990 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17766, Invalid=17766, Unknown=0, NotChecked=0, Total=35532 [2018-07-23 15:32:19,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2018-07-23 15:32:19,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2018-07-23 15:32:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2018-07-23 15:32:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 378 transitions. [2018-07-23 15:32:19,993 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 378 transitions. Word has length 375 [2018-07-23 15:32:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:19,994 INFO L471 AbstractCegarLoop]: Abstraction has 378 states and 378 transitions. [2018-07-23 15:32:19,994 INFO L472 AbstractCegarLoop]: Interpolant automaton has 189 states. [2018-07-23 15:32:19,994 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 378 transitions. [2018-07-23 15:32:19,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-07-23 15:32:19,995 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:19,995 INFO L353 BasicCegarLoop]: trace histogram [188, 187, 1, 1] [2018-07-23 15:32:19,995 INFO L414 AbstractCegarLoop]: === Iteration 188 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:19,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1782733206, now seen corresponding path program 187 times [2018-07-23 15:32:19,995 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 35156 backedges. 0 proven. 35156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:21,244 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:21,244 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [188] total 188 [2018-07-23 15:32:21,244 INFO L450 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-07-23 15:32:21,246 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-07-23 15:32:21,247 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17955, Invalid=17955, Unknown=0, NotChecked=0, Total=35910 [2018-07-23 15:32:21,247 INFO L87 Difference]: Start difference. First operand 378 states and 378 transitions. Second operand 190 states. [2018-07-23 15:32:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:21,691 INFO L93 Difference]: Finished difference Result 381 states and 381 transitions. [2018-07-23 15:32:21,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2018-07-23 15:32:21,691 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 377 [2018-07-23 15:32:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:21,692 INFO L225 Difference]: With dead ends: 381 [2018-07-23 15:32:21,692 INFO L226 Difference]: Without dead ends: 380 [2018-07-23 15:32:21,693 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17955, Invalid=17955, Unknown=0, NotChecked=0, Total=35910 [2018-07-23 15:32:21,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2018-07-23 15:32:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2018-07-23 15:32:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-07-23 15:32:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 380 transitions. [2018-07-23 15:32:21,697 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 380 transitions. Word has length 377 [2018-07-23 15:32:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:21,697 INFO L471 AbstractCegarLoop]: Abstraction has 380 states and 380 transitions. [2018-07-23 15:32:21,698 INFO L472 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-07-23 15:32:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 380 transitions. [2018-07-23 15:32:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2018-07-23 15:32:21,699 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:21,699 INFO L353 BasicCegarLoop]: trace histogram [189, 188, 1, 1] [2018-07-23 15:32:21,700 INFO L414 AbstractCegarLoop]: === Iteration 189 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:21,700 INFO L82 PathProgramCache]: Analyzing trace with hash -485339048, now seen corresponding path program 188 times [2018-07-23 15:32:21,700 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 35532 backedges. 0 proven. 35532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:22,817 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:22,817 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [189] total 189 [2018-07-23 15:32:22,817 INFO L450 AbstractCegarLoop]: Interpolant automaton has 191 states [2018-07-23 15:32:22,820 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2018-07-23 15:32:22,821 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18145, Invalid=18145, Unknown=0, NotChecked=0, Total=36290 [2018-07-23 15:32:22,821 INFO L87 Difference]: Start difference. First operand 380 states and 380 transitions. Second operand 191 states. [2018-07-23 15:32:23,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:23,976 INFO L93 Difference]: Finished difference Result 383 states and 383 transitions. [2018-07-23 15:32:23,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2018-07-23 15:32:23,976 INFO L78 Accepts]: Start accepts. Automaton has 191 states. Word has length 379 [2018-07-23 15:32:23,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:23,977 INFO L225 Difference]: With dead ends: 383 [2018-07-23 15:32:23,977 INFO L226 Difference]: Without dead ends: 382 [2018-07-23 15:32:23,980 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18145, Invalid=18145, Unknown=0, NotChecked=0, Total=36290 [2018-07-23 15:32:23,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2018-07-23 15:32:23,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2018-07-23 15:32:23,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2018-07-23 15:32:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 382 transitions. [2018-07-23 15:32:23,983 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 382 transitions. Word has length 379 [2018-07-23 15:32:23,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:23,984 INFO L471 AbstractCegarLoop]: Abstraction has 382 states and 382 transitions. [2018-07-23 15:32:23,984 INFO L472 AbstractCegarLoop]: Interpolant automaton has 191 states. [2018-07-23 15:32:23,984 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 382 transitions. [2018-07-23 15:32:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2018-07-23 15:32:23,985 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:23,985 INFO L353 BasicCegarLoop]: trace histogram [190, 189, 1, 1] [2018-07-23 15:32:23,985 INFO L414 AbstractCegarLoop]: === Iteration 190 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:23,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1740611226, now seen corresponding path program 189 times [2018-07-23 15:32:23,985 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 35910 backedges. 0 proven. 35910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:25,276 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:25,276 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [190] total 190 [2018-07-23 15:32:25,276 INFO L450 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-07-23 15:32:25,279 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-07-23 15:32:25,280 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2018-07-23 15:32:25,280 INFO L87 Difference]: Start difference. First operand 382 states and 382 transitions. Second operand 192 states. [2018-07-23 15:32:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:27,500 INFO L93 Difference]: Finished difference Result 385 states and 385 transitions. [2018-07-23 15:32:27,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2018-07-23 15:32:27,500 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 381 [2018-07-23 15:32:27,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:27,501 INFO L225 Difference]: With dead ends: 385 [2018-07-23 15:32:27,501 INFO L226 Difference]: Without dead ends: 384 [2018-07-23 15:32:27,503 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2018-07-23 15:32:27,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2018-07-23 15:32:27,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2018-07-23 15:32:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2018-07-23 15:32:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 384 transitions. [2018-07-23 15:32:27,507 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 384 transitions. Word has length 381 [2018-07-23 15:32:27,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:27,507 INFO L471 AbstractCegarLoop]: Abstraction has 384 states and 384 transitions. [2018-07-23 15:32:27,508 INFO L472 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-07-23 15:32:27,508 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 384 transitions. [2018-07-23 15:32:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2018-07-23 15:32:27,509 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:27,509 INFO L353 BasicCegarLoop]: trace histogram [191, 190, 1, 1] [2018-07-23 15:32:27,509 INFO L414 AbstractCegarLoop]: === Iteration 191 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:27,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1985111132, now seen corresponding path program 190 times [2018-07-23 15:32:27,509 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 36290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:29,037 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:29,038 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [191] total 191 [2018-07-23 15:32:29,038 INFO L450 AbstractCegarLoop]: Interpolant automaton has 193 states [2018-07-23 15:32:29,041 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2018-07-23 15:32:29,043 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-07-23 15:32:29,043 INFO L87 Difference]: Start difference. First operand 384 states and 384 transitions. Second operand 193 states. [2018-07-23 15:32:30,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:30,478 INFO L93 Difference]: Finished difference Result 387 states and 387 transitions. [2018-07-23 15:32:30,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2018-07-23 15:32:30,478 INFO L78 Accepts]: Start accepts. Automaton has 193 states. Word has length 383 [2018-07-23 15:32:30,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:30,479 INFO L225 Difference]: With dead ends: 387 [2018-07-23 15:32:30,479 INFO L226 Difference]: Without dead ends: 386 [2018-07-23 15:32:30,482 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-07-23 15:32:30,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-07-23 15:32:30,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2018-07-23 15:32:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2018-07-23 15:32:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 386 transitions. [2018-07-23 15:32:30,486 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 386 transitions. Word has length 383 [2018-07-23 15:32:30,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:30,487 INFO L471 AbstractCegarLoop]: Abstraction has 386 states and 386 transitions. [2018-07-23 15:32:30,487 INFO L472 AbstractCegarLoop]: Interpolant automaton has 193 states. [2018-07-23 15:32:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 386 transitions. [2018-07-23 15:32:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2018-07-23 15:32:30,488 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:30,489 INFO L353 BasicCegarLoop]: trace histogram [192, 191, 1, 1] [2018-07-23 15:32:30,489 INFO L414 AbstractCegarLoop]: === Iteration 192 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:30,489 INFO L82 PathProgramCache]: Analyzing trace with hash 726319518, now seen corresponding path program 191 times [2018-07-23 15:32:30,489 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 36672 backedges. 0 proven. 36672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:32,035 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:32,035 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [192] total 192 [2018-07-23 15:32:32,036 INFO L450 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-07-23 15:32:32,039 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-07-23 15:32:32,041 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18721, Invalid=18721, Unknown=0, NotChecked=0, Total=37442 [2018-07-23 15:32:32,041 INFO L87 Difference]: Start difference. First operand 386 states and 386 transitions. Second operand 194 states. [2018-07-23 15:32:32,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:32,646 INFO L93 Difference]: Finished difference Result 389 states and 389 transitions. [2018-07-23 15:32:32,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2018-07-23 15:32:32,646 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 385 [2018-07-23 15:32:32,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:32,647 INFO L225 Difference]: With dead ends: 389 [2018-07-23 15:32:32,647 INFO L226 Difference]: Without dead ends: 388 [2018-07-23 15:32:32,649 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=18721, Invalid=18721, Unknown=0, NotChecked=0, Total=37442 [2018-07-23 15:32:32,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2018-07-23 15:32:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2018-07-23 15:32:32,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-07-23 15:32:32,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-07-23 15:32:32,654 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 385 [2018-07-23 15:32:32,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:32,654 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-07-23 15:32:32,655 INFO L472 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-07-23 15:32:32,655 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-07-23 15:32:32,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-07-23 15:32:32,656 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:32,656 INFO L353 BasicCegarLoop]: trace histogram [193, 192, 1, 1] [2018-07-23 15:32:32,657 INFO L414 AbstractCegarLoop]: === Iteration 193 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:32,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2086611360, now seen corresponding path program 192 times [2018-07-23 15:32:32,657 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 37056 backedges. 0 proven. 37056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:34,181 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:34,181 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [193] total 193 [2018-07-23 15:32:34,181 INFO L450 AbstractCegarLoop]: Interpolant automaton has 195 states [2018-07-23 15:32:34,184 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2018-07-23 15:32:34,188 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18915, Invalid=18915, Unknown=0, NotChecked=0, Total=37830 [2018-07-23 15:32:34,188 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 195 states. [2018-07-23 15:32:35,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:35,263 INFO L93 Difference]: Finished difference Result 391 states and 391 transitions. [2018-07-23 15:32:35,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2018-07-23 15:32:35,263 INFO L78 Accepts]: Start accepts. Automaton has 195 states. Word has length 387 [2018-07-23 15:32:35,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:35,264 INFO L225 Difference]: With dead ends: 391 [2018-07-23 15:32:35,264 INFO L226 Difference]: Without dead ends: 390 [2018-07-23 15:32:35,267 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=18915, Invalid=18915, Unknown=0, NotChecked=0, Total=37830 [2018-07-23 15:32:35,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2018-07-23 15:32:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2018-07-23 15:32:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2018-07-23 15:32:35,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 390 transitions. [2018-07-23 15:32:35,272 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 390 transitions. Word has length 387 [2018-07-23 15:32:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:35,272 INFO L471 AbstractCegarLoop]: Abstraction has 390 states and 390 transitions. [2018-07-23 15:32:35,272 INFO L472 AbstractCegarLoop]: Interpolant automaton has 195 states. [2018-07-23 15:32:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 390 transitions. [2018-07-23 15:32:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2018-07-23 15:32:35,273 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:35,273 INFO L353 BasicCegarLoop]: trace histogram [194, 193, 1, 1] [2018-07-23 15:32:35,273 INFO L414 AbstractCegarLoop]: === Iteration 194 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:35,274 INFO L82 PathProgramCache]: Analyzing trace with hash 516211362, now seen corresponding path program 193 times [2018-07-23 15:32:35,274 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 37442 backedges. 0 proven. 37442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:36,874 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:36,875 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [194] total 194 [2018-07-23 15:32:36,875 INFO L450 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-07-23 15:32:36,878 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-07-23 15:32:36,879 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19110, Invalid=19110, Unknown=0, NotChecked=0, Total=38220 [2018-07-23 15:32:36,880 INFO L87 Difference]: Start difference. First operand 390 states and 390 transitions. Second operand 196 states. [2018-07-23 15:32:38,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:38,435 INFO L93 Difference]: Finished difference Result 393 states and 393 transitions. [2018-07-23 15:32:38,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2018-07-23 15:32:38,435 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 389 [2018-07-23 15:32:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:38,435 INFO L225 Difference]: With dead ends: 393 [2018-07-23 15:32:38,436 INFO L226 Difference]: Without dead ends: 392 [2018-07-23 15:32:38,438 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=19110, Invalid=19110, Unknown=0, NotChecked=0, Total=38220 [2018-07-23 15:32:38,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2018-07-23 15:32:38,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2018-07-23 15:32:38,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2018-07-23 15:32:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 392 transitions. [2018-07-23 15:32:38,442 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 392 transitions. Word has length 389 [2018-07-23 15:32:38,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:38,443 INFO L471 AbstractCegarLoop]: Abstraction has 392 states and 392 transitions. [2018-07-23 15:32:38,443 INFO L472 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-07-23 15:32:38,443 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 392 transitions. [2018-07-23 15:32:38,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2018-07-23 15:32:38,444 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:38,444 INFO L353 BasicCegarLoop]: trace histogram [195, 194, 1, 1] [2018-07-23 15:32:38,444 INFO L414 AbstractCegarLoop]: === Iteration 195 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:38,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2137086364, now seen corresponding path program 194 times [2018-07-23 15:32:38,445 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 37830 backedges. 0 proven. 37830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:39,870 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:39,870 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [195] total 195 [2018-07-23 15:32:39,870 INFO L450 AbstractCegarLoop]: Interpolant automaton has 197 states [2018-07-23 15:32:39,873 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2018-07-23 15:32:39,874 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2018-07-23 15:32:39,875 INFO L87 Difference]: Start difference. First operand 392 states and 392 transitions. Second operand 197 states. [2018-07-23 15:32:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:41,964 INFO L93 Difference]: Finished difference Result 395 states and 395 transitions. [2018-07-23 15:32:41,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2018-07-23 15:32:41,964 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 391 [2018-07-23 15:32:41,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:41,965 INFO L225 Difference]: With dead ends: 395 [2018-07-23 15:32:41,965 INFO L226 Difference]: Without dead ends: 394 [2018-07-23 15:32:41,967 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2018-07-23 15:32:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2018-07-23 15:32:41,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2018-07-23 15:32:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2018-07-23 15:32:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 394 transitions. [2018-07-23 15:32:41,971 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 394 transitions. Word has length 391 [2018-07-23 15:32:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:41,971 INFO L471 AbstractCegarLoop]: Abstraction has 394 states and 394 transitions. [2018-07-23 15:32:41,971 INFO L472 AbstractCegarLoop]: Interpolant automaton has 197 states. [2018-07-23 15:32:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 394 transitions. [2018-07-23 15:32:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2018-07-23 15:32:41,972 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:41,972 INFO L353 BasicCegarLoop]: trace histogram [196, 195, 1, 1] [2018-07-23 15:32:41,972 INFO L414 AbstractCegarLoop]: === Iteration 196 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:41,972 INFO L82 PathProgramCache]: Analyzing trace with hash -745627226, now seen corresponding path program 195 times [2018-07-23 15:32:41,972 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 38220 backedges. 0 proven. 38220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:43,305 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:43,305 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [196] total 196 [2018-07-23 15:32:43,305 INFO L450 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-07-23 15:32:43,308 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-07-23 15:32:43,309 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19503, Invalid=19503, Unknown=0, NotChecked=0, Total=39006 [2018-07-23 15:32:43,310 INFO L87 Difference]: Start difference. First operand 394 states and 394 transitions. Second operand 198 states. [2018-07-23 15:32:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:45,264 INFO L93 Difference]: Finished difference Result 397 states and 397 transitions. [2018-07-23 15:32:45,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2018-07-23 15:32:45,264 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 393 [2018-07-23 15:32:45,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:45,264 INFO L225 Difference]: With dead ends: 397 [2018-07-23 15:32:45,265 INFO L226 Difference]: Without dead ends: 396 [2018-07-23 15:32:45,268 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=19503, Invalid=19503, Unknown=0, NotChecked=0, Total=39006 [2018-07-23 15:32:45,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2018-07-23 15:32:45,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 396. [2018-07-23 15:32:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2018-07-23 15:32:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 396 transitions. [2018-07-23 15:32:45,272 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 396 transitions. Word has length 393 [2018-07-23 15:32:45,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:45,272 INFO L471 AbstractCegarLoop]: Abstraction has 396 states and 396 transitions. [2018-07-23 15:32:45,272 INFO L472 AbstractCegarLoop]: Interpolant automaton has 198 states. [2018-07-23 15:32:45,272 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 396 transitions. [2018-07-23 15:32:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2018-07-23 15:32:45,274 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:45,274 INFO L353 BasicCegarLoop]: trace histogram [197, 196, 1, 1] [2018-07-23 15:32:45,274 INFO L414 AbstractCegarLoop]: === Iteration 197 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:45,274 INFO L82 PathProgramCache]: Analyzing trace with hash 711775336, now seen corresponding path program 196 times [2018-07-23 15:32:45,274 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 38612 backedges. 0 proven. 38612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:46,770 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:46,770 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [197] total 197 [2018-07-23 15:32:46,770 INFO L450 AbstractCegarLoop]: Interpolant automaton has 199 states [2018-07-23 15:32:46,774 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2018-07-23 15:32:46,776 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2018-07-23 15:32:46,777 INFO L87 Difference]: Start difference. First operand 396 states and 396 transitions. Second operand 199 states. [2018-07-23 15:32:48,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:48,878 INFO L93 Difference]: Finished difference Result 399 states and 399 transitions. [2018-07-23 15:32:48,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2018-07-23 15:32:48,879 INFO L78 Accepts]: Start accepts. Automaton has 199 states. Word has length 395 [2018-07-23 15:32:48,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:48,879 INFO L225 Difference]: With dead ends: 399 [2018-07-23 15:32:48,879 INFO L226 Difference]: Without dead ends: 398 [2018-07-23 15:32:48,882 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2018-07-23 15:32:48,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-07-23 15:32:48,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2018-07-23 15:32:48,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2018-07-23 15:32:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 398 transitions. [2018-07-23 15:32:48,886 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 398 transitions. Word has length 395 [2018-07-23 15:32:48,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:48,886 INFO L471 AbstractCegarLoop]: Abstraction has 398 states and 398 transitions. [2018-07-23 15:32:48,886 INFO L472 AbstractCegarLoop]: Interpolant automaton has 199 states. [2018-07-23 15:32:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 398 transitions. [2018-07-23 15:32:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2018-07-23 15:32:48,888 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:48,888 INFO L353 BasicCegarLoop]: trace histogram [198, 197, 1, 1] [2018-07-23 15:32:48,888 INFO L414 AbstractCegarLoop]: === Iteration 198 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:48,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1116298922, now seen corresponding path program 197 times [2018-07-23 15:32:48,888 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 39006 backedges. 0 proven. 39006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:50,302 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:50,302 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [198] total 198 [2018-07-23 15:32:50,303 INFO L450 AbstractCegarLoop]: Interpolant automaton has 200 states [2018-07-23 15:32:50,306 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2018-07-23 15:32:50,308 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19900, Invalid=19900, Unknown=0, NotChecked=0, Total=39800 [2018-07-23 15:32:50,308 INFO L87 Difference]: Start difference. First operand 398 states and 398 transitions. Second operand 200 states. [2018-07-23 15:32:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:52,490 INFO L93 Difference]: Finished difference Result 401 states and 401 transitions. [2018-07-23 15:32:52,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2018-07-23 15:32:52,490 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 397 [2018-07-23 15:32:52,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:52,491 INFO L225 Difference]: With dead ends: 401 [2018-07-23 15:32:52,491 INFO L226 Difference]: Without dead ends: 400 [2018-07-23 15:32:52,495 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=19900, Invalid=19900, Unknown=0, NotChecked=0, Total=39800 [2018-07-23 15:32:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2018-07-23 15:32:52,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2018-07-23 15:32:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-07-23 15:32:52,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 400 transitions. [2018-07-23 15:32:52,499 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 400 transitions. Word has length 397 [2018-07-23 15:32:52,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:52,499 INFO L471 AbstractCegarLoop]: Abstraction has 400 states and 400 transitions. [2018-07-23 15:32:52,499 INFO L472 AbstractCegarLoop]: Interpolant automaton has 200 states. [2018-07-23 15:32:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 400 transitions. [2018-07-23 15:32:52,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-07-23 15:32:52,501 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:52,501 INFO L353 BasicCegarLoop]: trace histogram [199, 198, 1, 1] [2018-07-23 15:32:52,501 INFO L414 AbstractCegarLoop]: === Iteration 199 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:52,501 INFO L82 PathProgramCache]: Analyzing trace with hash -978558868, now seen corresponding path program 198 times [2018-07-23 15:32:52,501 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 39402 backedges. 0 proven. 39402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:53,921 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:53,921 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [199] total 199 [2018-07-23 15:32:53,922 INFO L450 AbstractCegarLoop]: Interpolant automaton has 201 states [2018-07-23 15:32:53,925 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2018-07-23 15:32:53,927 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20100, Invalid=20100, Unknown=0, NotChecked=0, Total=40200 [2018-07-23 15:32:53,927 INFO L87 Difference]: Start difference. First operand 400 states and 400 transitions. Second operand 201 states. [2018-07-23 15:32:55,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:55,986 INFO L93 Difference]: Finished difference Result 403 states and 403 transitions. [2018-07-23 15:32:55,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2018-07-23 15:32:55,987 INFO L78 Accepts]: Start accepts. Automaton has 201 states. Word has length 399 [2018-07-23 15:32:55,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:55,987 INFO L225 Difference]: With dead ends: 403 [2018-07-23 15:32:55,987 INFO L226 Difference]: Without dead ends: 402 [2018-07-23 15:32:55,988 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=20100, Invalid=20100, Unknown=0, NotChecked=0, Total=40200 [2018-07-23 15:32:55,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2018-07-23 15:32:55,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2018-07-23 15:32:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2018-07-23 15:32:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 402 transitions. [2018-07-23 15:32:55,992 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 402 transitions. Word has length 399 [2018-07-23 15:32:55,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:55,992 INFO L471 AbstractCegarLoop]: Abstraction has 402 states and 402 transitions. [2018-07-23 15:32:55,992 INFO L472 AbstractCegarLoop]: Interpolant automaton has 201 states. [2018-07-23 15:32:55,993 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 402 transitions. [2018-07-23 15:32:55,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2018-07-23 15:32:55,994 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:55,994 INFO L353 BasicCegarLoop]: trace histogram [200, 199, 1, 1] [2018-07-23 15:32:55,994 INFO L414 AbstractCegarLoop]: === Iteration 200 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:55,994 INFO L82 PathProgramCache]: Analyzing trace with hash 202766766, now seen corresponding path program 199 times [2018-07-23 15:32:55,994 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 39800 backedges. 0 proven. 39800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:57,542 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:57,542 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [200] total 200 [2018-07-23 15:32:57,543 INFO L450 AbstractCegarLoop]: Interpolant automaton has 202 states [2018-07-23 15:32:57,546 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2018-07-23 15:32:57,550 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20301, Invalid=20301, Unknown=0, NotChecked=0, Total=40602 [2018-07-23 15:32:57,550 INFO L87 Difference]: Start difference. First operand 402 states and 402 transitions. Second operand 202 states. [2018-07-23 15:32:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:59,670 INFO L93 Difference]: Finished difference Result 405 states and 405 transitions. [2018-07-23 15:32:59,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2018-07-23 15:32:59,670 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 401 [2018-07-23 15:32:59,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:59,671 INFO L225 Difference]: With dead ends: 405 [2018-07-23 15:32:59,671 INFO L226 Difference]: Without dead ends: 404 [2018-07-23 15:32:59,673 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20301, Invalid=20301, Unknown=0, NotChecked=0, Total=40602 [2018-07-23 15:32:59,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2018-07-23 15:32:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 404. [2018-07-23 15:32:59,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2018-07-23 15:32:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 404 transitions. [2018-07-23 15:32:59,677 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 404 transitions. Word has length 401 [2018-07-23 15:32:59,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:59,677 INFO L471 AbstractCegarLoop]: Abstraction has 404 states and 404 transitions. [2018-07-23 15:32:59,677 INFO L472 AbstractCegarLoop]: Interpolant automaton has 202 states. [2018-07-23 15:32:59,677 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 404 transitions. [2018-07-23 15:32:59,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2018-07-23 15:32:59,678 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:59,678 INFO L353 BasicCegarLoop]: trace histogram [201, 200, 1, 1] [2018-07-23 15:32:59,678 INFO L414 AbstractCegarLoop]: === Iteration 201 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:32:59,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1585334896, now seen corresponding path program 200 times [2018-07-23 15:32:59,679 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 40200 backedges. 0 proven. 40200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:01,061 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:01,061 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [201] total 201 [2018-07-23 15:33:01,062 INFO L450 AbstractCegarLoop]: Interpolant automaton has 203 states [2018-07-23 15:33:01,065 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2018-07-23 15:33:01,066 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2018-07-23 15:33:01,066 INFO L87 Difference]: Start difference. First operand 404 states and 404 transitions. Second operand 203 states. [2018-07-23 15:33:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:02,562 INFO L93 Difference]: Finished difference Result 407 states and 407 transitions. [2018-07-23 15:33:02,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2018-07-23 15:33:02,562 INFO L78 Accepts]: Start accepts. Automaton has 203 states. Word has length 403 [2018-07-23 15:33:02,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:02,563 INFO L225 Difference]: With dead ends: 407 [2018-07-23 15:33:02,563 INFO L226 Difference]: Without dead ends: 406 [2018-07-23 15:33:02,565 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2018-07-23 15:33:02,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2018-07-23 15:33:02,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2018-07-23 15:33:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2018-07-23 15:33:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 406 transitions. [2018-07-23 15:33:02,568 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 406 transitions. Word has length 403 [2018-07-23 15:33:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:02,569 INFO L471 AbstractCegarLoop]: Abstraction has 406 states and 406 transitions. [2018-07-23 15:33:02,569 INFO L472 AbstractCegarLoop]: Interpolant automaton has 203 states. [2018-07-23 15:33:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 406 transitions. [2018-07-23 15:33:02,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2018-07-23 15:33:02,570 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:02,570 INFO L353 BasicCegarLoop]: trace histogram [202, 201, 1, 1] [2018-07-23 15:33:02,570 INFO L414 AbstractCegarLoop]: === Iteration 202 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:02,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1206553934, now seen corresponding path program 201 times [2018-07-23 15:33:02,570 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 40602 backedges. 0 proven. 40602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:04,010 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:04,010 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [202] total 202 [2018-07-23 15:33:04,011 INFO L450 AbstractCegarLoop]: Interpolant automaton has 204 states [2018-07-23 15:33:04,014 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2018-07-23 15:33:04,016 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20706, Invalid=20706, Unknown=0, NotChecked=0, Total=41412 [2018-07-23 15:33:04,016 INFO L87 Difference]: Start difference. First operand 406 states and 406 transitions. Second operand 204 states. [2018-07-23 15:33:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:04,701 INFO L93 Difference]: Finished difference Result 409 states and 409 transitions. [2018-07-23 15:33:04,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2018-07-23 15:33:04,702 INFO L78 Accepts]: Start accepts. Automaton has 204 states. Word has length 405 [2018-07-23 15:33:04,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:04,703 INFO L225 Difference]: With dead ends: 409 [2018-07-23 15:33:04,703 INFO L226 Difference]: Without dead ends: 408 [2018-07-23 15:33:04,707 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=20706, Invalid=20706, Unknown=0, NotChecked=0, Total=41412 [2018-07-23 15:33:04,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2018-07-23 15:33:04,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2018-07-23 15:33:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2018-07-23 15:33:04,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 408 transitions. [2018-07-23 15:33:04,712 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 408 transitions. Word has length 405 [2018-07-23 15:33:04,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:04,713 INFO L471 AbstractCegarLoop]: Abstraction has 408 states and 408 transitions. [2018-07-23 15:33:04,713 INFO L472 AbstractCegarLoop]: Interpolant automaton has 204 states. [2018-07-23 15:33:04,713 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 408 transitions. [2018-07-23 15:33:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2018-07-23 15:33:04,715 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:04,715 INFO L353 BasicCegarLoop]: trace histogram [203, 202, 1, 1] [2018-07-23 15:33:04,715 INFO L414 AbstractCegarLoop]: === Iteration 203 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:04,715 INFO L82 PathProgramCache]: Analyzing trace with hash 142840436, now seen corresponding path program 202 times [2018-07-23 15:33:04,715 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 41006 backedges. 0 proven. 41006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:06,175 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:06,175 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [203] total 203 [2018-07-23 15:33:06,176 INFO L450 AbstractCegarLoop]: Interpolant automaton has 205 states [2018-07-23 15:33:06,179 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2018-07-23 15:33:06,181 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20910, Invalid=20910, Unknown=0, NotChecked=0, Total=41820 [2018-07-23 15:33:06,181 INFO L87 Difference]: Start difference. First operand 408 states and 408 transitions. Second operand 205 states. [2018-07-23 15:33:07,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:07,095 INFO L93 Difference]: Finished difference Result 411 states and 411 transitions. [2018-07-23 15:33:07,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2018-07-23 15:33:07,095 INFO L78 Accepts]: Start accepts. Automaton has 205 states. Word has length 407 [2018-07-23 15:33:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:07,096 INFO L225 Difference]: With dead ends: 411 [2018-07-23 15:33:07,096 INFO L226 Difference]: Without dead ends: 410 [2018-07-23 15:33:07,098 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20910, Invalid=20910, Unknown=0, NotChecked=0, Total=41820 [2018-07-23 15:33:07,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-07-23 15:33:07,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2018-07-23 15:33:07,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2018-07-23 15:33:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 410 transitions. [2018-07-23 15:33:07,102 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 410 transitions. Word has length 407 [2018-07-23 15:33:07,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:07,102 INFO L471 AbstractCegarLoop]: Abstraction has 410 states and 410 transitions. [2018-07-23 15:33:07,102 INFO L472 AbstractCegarLoop]: Interpolant automaton has 205 states. [2018-07-23 15:33:07,102 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 410 transitions. [2018-07-23 15:33:07,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-07-23 15:33:07,103 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:07,104 INFO L353 BasicCegarLoop]: trace histogram [204, 203, 1, 1] [2018-07-23 15:33:07,104 INFO L414 AbstractCegarLoop]: === Iteration 204 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:07,104 INFO L82 PathProgramCache]: Analyzing trace with hash -169293386, now seen corresponding path program 203 times [2018-07-23 15:33:07,104 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 41412 backedges. 0 proven. 41412 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:08,502 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:08,503 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [204] total 204 [2018-07-23 15:33:08,503 INFO L450 AbstractCegarLoop]: Interpolant automaton has 206 states [2018-07-23 15:33:08,507 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2018-07-23 15:33:08,510 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21115, Invalid=21115, Unknown=0, NotChecked=0, Total=42230 [2018-07-23 15:33:08,510 INFO L87 Difference]: Start difference. First operand 410 states and 410 transitions. Second operand 206 states. [2018-07-23 15:33:10,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:10,362 INFO L93 Difference]: Finished difference Result 413 states and 413 transitions. [2018-07-23 15:33:10,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2018-07-23 15:33:10,362 INFO L78 Accepts]: Start accepts. Automaton has 206 states. Word has length 409 [2018-07-23 15:33:10,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:10,363 INFO L225 Difference]: With dead ends: 413 [2018-07-23 15:33:10,363 INFO L226 Difference]: Without dead ends: 412 [2018-07-23 15:33:10,366 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=21115, Invalid=21115, Unknown=0, NotChecked=0, Total=42230 [2018-07-23 15:33:10,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2018-07-23 15:33:10,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2018-07-23 15:33:10,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-07-23 15:33:10,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 412 transitions. [2018-07-23 15:33:10,370 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 412 transitions. Word has length 409 [2018-07-23 15:33:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:10,370 INFO L471 AbstractCegarLoop]: Abstraction has 412 states and 412 transitions. [2018-07-23 15:33:10,370 INFO L472 AbstractCegarLoop]: Interpolant automaton has 206 states. [2018-07-23 15:33:10,370 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 412 transitions. [2018-07-23 15:33:10,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-07-23 15:33:10,372 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:10,372 INFO L353 BasicCegarLoop]: trace histogram [205, 204, 1, 1] [2018-07-23 15:33:10,372 INFO L414 AbstractCegarLoop]: === Iteration 205 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:10,372 INFO L82 PathProgramCache]: Analyzing trace with hash 517814392, now seen corresponding path program 204 times [2018-07-23 15:33:10,372 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 41820 backedges. 0 proven. 41820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:11,936 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:11,936 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [205] total 205 [2018-07-23 15:33:11,937 INFO L450 AbstractCegarLoop]: Interpolant automaton has 207 states [2018-07-23 15:33:11,940 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2018-07-23 15:33:11,941 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21321, Invalid=21321, Unknown=0, NotChecked=0, Total=42642 [2018-07-23 15:33:11,942 INFO L87 Difference]: Start difference. First operand 412 states and 412 transitions. Second operand 207 states. [2018-07-23 15:33:14,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:14,599 INFO L93 Difference]: Finished difference Result 415 states and 415 transitions. [2018-07-23 15:33:14,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2018-07-23 15:33:14,599 INFO L78 Accepts]: Start accepts. Automaton has 207 states. Word has length 411 [2018-07-23 15:33:14,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:14,600 INFO L225 Difference]: With dead ends: 415 [2018-07-23 15:33:14,600 INFO L226 Difference]: Without dead ends: 414 [2018-07-23 15:33:14,603 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=21321, Invalid=21321, Unknown=0, NotChecked=0, Total=42642 [2018-07-23 15:33:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2018-07-23 15:33:14,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2018-07-23 15:33:14,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2018-07-23 15:33:14,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 414 transitions. [2018-07-23 15:33:14,606 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 414 transitions. Word has length 411 [2018-07-23 15:33:14,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:14,607 INFO L471 AbstractCegarLoop]: Abstraction has 414 states and 414 transitions. [2018-07-23 15:33:14,607 INFO L472 AbstractCegarLoop]: Interpolant automaton has 207 states. [2018-07-23 15:33:14,607 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 414 transitions. [2018-07-23 15:33:14,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2018-07-23 15:33:14,608 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:14,608 INFO L353 BasicCegarLoop]: trace histogram [206, 205, 1, 1] [2018-07-23 15:33:14,608 INFO L414 AbstractCegarLoop]: === Iteration 206 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:14,608 INFO L82 PathProgramCache]: Analyzing trace with hash -596574534, now seen corresponding path program 205 times [2018-07-23 15:33:14,608 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 42230 backedges. 0 proven. 42230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:16,175 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:16,175 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [206] total 206 [2018-07-23 15:33:16,175 INFO L450 AbstractCegarLoop]: Interpolant automaton has 208 states [2018-07-23 15:33:16,177 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2018-07-23 15:33:16,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21528, Invalid=21528, Unknown=0, NotChecked=0, Total=43056 [2018-07-23 15:33:16,178 INFO L87 Difference]: Start difference. First operand 414 states and 414 transitions. Second operand 208 states. [2018-07-23 15:33:17,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:17,585 INFO L93 Difference]: Finished difference Result 417 states and 417 transitions. [2018-07-23 15:33:17,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2018-07-23 15:33:17,585 INFO L78 Accepts]: Start accepts. Automaton has 208 states. Word has length 413 [2018-07-23 15:33:17,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:17,586 INFO L225 Difference]: With dead ends: 417 [2018-07-23 15:33:17,586 INFO L226 Difference]: Without dead ends: 416 [2018-07-23 15:33:17,588 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=21528, Invalid=21528, Unknown=0, NotChecked=0, Total=43056 [2018-07-23 15:33:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2018-07-23 15:33:17,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2018-07-23 15:33:17,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2018-07-23 15:33:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 416 transitions. [2018-07-23 15:33:17,592 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 416 transitions. Word has length 413 [2018-07-23 15:33:17,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:17,592 INFO L471 AbstractCegarLoop]: Abstraction has 416 states and 416 transitions. [2018-07-23 15:33:17,592 INFO L472 AbstractCegarLoop]: Interpolant automaton has 208 states. [2018-07-23 15:33:17,592 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 416 transitions. [2018-07-23 15:33:17,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-07-23 15:33:17,594 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:17,594 INFO L353 BasicCegarLoop]: trace histogram [207, 206, 1, 1] [2018-07-23 15:33:17,594 INFO L414 AbstractCegarLoop]: === Iteration 207 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:17,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2077475716, now seen corresponding path program 206 times [2018-07-23 15:33:17,594 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 42642 backedges. 0 proven. 42642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:19,171 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:19,171 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [207] total 207 [2018-07-23 15:33:19,171 INFO L450 AbstractCegarLoop]: Interpolant automaton has 209 states [2018-07-23 15:33:19,175 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2018-07-23 15:33:19,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2018-07-23 15:33:19,177 INFO L87 Difference]: Start difference. First operand 416 states and 416 transitions. Second operand 209 states. [2018-07-23 15:33:20,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:20,280 INFO L93 Difference]: Finished difference Result 419 states and 419 transitions. [2018-07-23 15:33:20,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2018-07-23 15:33:20,280 INFO L78 Accepts]: Start accepts. Automaton has 209 states. Word has length 415 [2018-07-23 15:33:20,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:20,281 INFO L225 Difference]: With dead ends: 419 [2018-07-23 15:33:20,281 INFO L226 Difference]: Without dead ends: 418 [2018-07-23 15:33:20,283 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2018-07-23 15:33:20,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2018-07-23 15:33:20,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2018-07-23 15:33:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2018-07-23 15:33:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 418 transitions. [2018-07-23 15:33:20,287 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 418 transitions. Word has length 415 [2018-07-23 15:33:20,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:20,288 INFO L471 AbstractCegarLoop]: Abstraction has 418 states and 418 transitions. [2018-07-23 15:33:20,288 INFO L472 AbstractCegarLoop]: Interpolant automaton has 209 states. [2018-07-23 15:33:20,288 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 418 transitions. [2018-07-23 15:33:20,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2018-07-23 15:33:20,289 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:20,289 INFO L353 BasicCegarLoop]: trace histogram [208, 207, 1, 1] [2018-07-23 15:33:20,289 INFO L414 AbstractCegarLoop]: === Iteration 208 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:20,289 INFO L82 PathProgramCache]: Analyzing trace with hash 705630654, now seen corresponding path program 207 times [2018-07-23 15:33:20,289 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 43056 backedges. 0 proven. 43056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:21,885 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:21,886 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [208] total 208 [2018-07-23 15:33:21,886 INFO L450 AbstractCegarLoop]: Interpolant automaton has 210 states [2018-07-23 15:33:21,888 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2018-07-23 15:33:21,890 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21945, Invalid=21945, Unknown=0, NotChecked=0, Total=43890 [2018-07-23 15:33:21,890 INFO L87 Difference]: Start difference. First operand 418 states and 418 transitions. Second operand 210 states. [2018-07-23 15:33:24,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:24,165 INFO L93 Difference]: Finished difference Result 421 states and 421 transitions. [2018-07-23 15:33:24,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2018-07-23 15:33:24,165 INFO L78 Accepts]: Start accepts. Automaton has 210 states. Word has length 417 [2018-07-23 15:33:24,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:24,166 INFO L225 Difference]: With dead ends: 421 [2018-07-23 15:33:24,166 INFO L226 Difference]: Without dead ends: 420 [2018-07-23 15:33:24,168 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=21945, Invalid=21945, Unknown=0, NotChecked=0, Total=43890 [2018-07-23 15:33:24,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2018-07-23 15:33:24,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2018-07-23 15:33:24,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2018-07-23 15:33:24,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 420 transitions. [2018-07-23 15:33:24,172 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 420 transitions. Word has length 417 [2018-07-23 15:33:24,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:24,172 INFO L471 AbstractCegarLoop]: Abstraction has 420 states and 420 transitions. [2018-07-23 15:33:24,172 INFO L472 AbstractCegarLoop]: Interpolant automaton has 210 states. [2018-07-23 15:33:24,172 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 420 transitions. [2018-07-23 15:33:24,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2018-07-23 15:33:24,173 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:24,173 INFO L353 BasicCegarLoop]: trace histogram [209, 208, 1, 1] [2018-07-23 15:33:24,173 INFO L414 AbstractCegarLoop]: === Iteration 209 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:24,174 INFO L82 PathProgramCache]: Analyzing trace with hash -493773184, now seen corresponding path program 208 times [2018-07-23 15:33:24,174 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 43472 backedges. 0 proven. 43472 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:25,729 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:25,729 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [209] total 209 [2018-07-23 15:33:25,730 INFO L450 AbstractCegarLoop]: Interpolant automaton has 211 states [2018-07-23 15:33:25,734 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2018-07-23 15:33:25,736 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2018-07-23 15:33:25,736 INFO L87 Difference]: Start difference. First operand 420 states and 420 transitions. Second operand 211 states. [2018-07-23 15:33:26,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:26,952 INFO L93 Difference]: Finished difference Result 423 states and 423 transitions. [2018-07-23 15:33:26,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2018-07-23 15:33:26,952 INFO L78 Accepts]: Start accepts. Automaton has 211 states. Word has length 419 [2018-07-23 15:33:26,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:26,953 INFO L225 Difference]: With dead ends: 423 [2018-07-23 15:33:26,953 INFO L226 Difference]: Without dead ends: 422 [2018-07-23 15:33:26,956 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2018-07-23 15:33:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-07-23 15:33:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2018-07-23 15:33:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2018-07-23 15:33:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 422 transitions. [2018-07-23 15:33:26,959 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 422 transitions. Word has length 419 [2018-07-23 15:33:26,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:26,960 INFO L471 AbstractCegarLoop]: Abstraction has 422 states and 422 transitions. [2018-07-23 15:33:26,960 INFO L472 AbstractCegarLoop]: Interpolant automaton has 211 states. [2018-07-23 15:33:26,960 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 422 transitions. [2018-07-23 15:33:26,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2018-07-23 15:33:26,961 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:26,961 INFO L353 BasicCegarLoop]: trace histogram [210, 209, 1, 1] [2018-07-23 15:33:26,961 INFO L414 AbstractCegarLoop]: === Iteration 210 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2069626174, now seen corresponding path program 209 times [2018-07-23 15:33:26,962 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 43890 backedges. 0 proven. 43890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:28,406 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:28,406 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [210] total 210 [2018-07-23 15:33:28,406 INFO L450 AbstractCegarLoop]: Interpolant automaton has 212 states [2018-07-23 15:33:28,409 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2018-07-23 15:33:28,411 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22366, Invalid=22366, Unknown=0, NotChecked=0, Total=44732 [2018-07-23 15:33:28,411 INFO L87 Difference]: Start difference. First operand 422 states and 422 transitions. Second operand 212 states. [2018-07-23 15:33:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:30,495 INFO L93 Difference]: Finished difference Result 425 states and 425 transitions. [2018-07-23 15:33:30,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2018-07-23 15:33:30,495 INFO L78 Accepts]: Start accepts. Automaton has 212 states. Word has length 421 [2018-07-23 15:33:30,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:30,496 INFO L225 Difference]: With dead ends: 425 [2018-07-23 15:33:30,496 INFO L226 Difference]: Without dead ends: 424 [2018-07-23 15:33:30,499 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22366, Invalid=22366, Unknown=0, NotChecked=0, Total=44732 [2018-07-23 15:33:30,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2018-07-23 15:33:30,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2018-07-23 15:33:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-07-23 15:33:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 424 transitions. [2018-07-23 15:33:30,502 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 424 transitions. Word has length 421 [2018-07-23 15:33:30,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:30,503 INFO L471 AbstractCegarLoop]: Abstraction has 424 states and 424 transitions. [2018-07-23 15:33:30,503 INFO L472 AbstractCegarLoop]: Interpolant automaton has 212 states. [2018-07-23 15:33:30,503 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 424 transitions. [2018-07-23 15:33:30,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-07-23 15:33:30,504 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:30,504 INFO L353 BasicCegarLoop]: trace histogram [211, 210, 1, 1] [2018-07-23 15:33:30,504 INFO L414 AbstractCegarLoop]: === Iteration 211 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:30,504 INFO L82 PathProgramCache]: Analyzing trace with hash -340894076, now seen corresponding path program 210 times [2018-07-23 15:33:30,504 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 44310 backedges. 0 proven. 44310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:32,141 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:32,141 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [211] total 211 [2018-07-23 15:33:32,141 INFO L450 AbstractCegarLoop]: Interpolant automaton has 213 states [2018-07-23 15:33:32,144 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2018-07-23 15:33:32,145 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2018-07-23 15:33:32,145 INFO L87 Difference]: Start difference. First operand 424 states and 424 transitions. Second operand 213 states. [2018-07-23 15:33:33,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:33,249 INFO L93 Difference]: Finished difference Result 427 states and 427 transitions. [2018-07-23 15:33:33,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2018-07-23 15:33:33,249 INFO L78 Accepts]: Start accepts. Automaton has 213 states. Word has length 423 [2018-07-23 15:33:33,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:33,250 INFO L225 Difference]: With dead ends: 427 [2018-07-23 15:33:33,250 INFO L226 Difference]: Without dead ends: 426 [2018-07-23 15:33:33,251 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2018-07-23 15:33:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2018-07-23 15:33:33,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 426. [2018-07-23 15:33:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2018-07-23 15:33:33,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 426 transitions. [2018-07-23 15:33:33,255 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 426 transitions. Word has length 423 [2018-07-23 15:33:33,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:33,255 INFO L471 AbstractCegarLoop]: Abstraction has 426 states and 426 transitions. [2018-07-23 15:33:33,255 INFO L472 AbstractCegarLoop]: Interpolant automaton has 213 states. [2018-07-23 15:33:33,255 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 426 transitions. [2018-07-23 15:33:33,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2018-07-23 15:33:33,257 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:33,257 INFO L353 BasicCegarLoop]: trace histogram [212, 211, 1, 1] [2018-07-23 15:33:33,257 INFO L414 AbstractCegarLoop]: === Iteration 212 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:33,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1181691450, now seen corresponding path program 211 times [2018-07-23 15:33:33,257 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 44732 backedges. 0 proven. 44732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:34,917 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:34,917 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [212] total 212 [2018-07-23 15:33:34,918 INFO L450 AbstractCegarLoop]: Interpolant automaton has 214 states [2018-07-23 15:33:34,921 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2018-07-23 15:33:34,923 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22791, Invalid=22791, Unknown=0, NotChecked=0, Total=45582 [2018-07-23 15:33:34,923 INFO L87 Difference]: Start difference. First operand 426 states and 426 transitions. Second operand 214 states. [2018-07-23 15:33:37,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:37,005 INFO L93 Difference]: Finished difference Result 429 states and 429 transitions. [2018-07-23 15:33:37,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2018-07-23 15:33:37,005 INFO L78 Accepts]: Start accepts. Automaton has 214 states. Word has length 425 [2018-07-23 15:33:37,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:37,006 INFO L225 Difference]: With dead ends: 429 [2018-07-23 15:33:37,006 INFO L226 Difference]: Without dead ends: 428 [2018-07-23 15:33:37,009 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22791, Invalid=22791, Unknown=0, NotChecked=0, Total=45582 [2018-07-23 15:33:37,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2018-07-23 15:33:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 428. [2018-07-23 15:33:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2018-07-23 15:33:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 428 transitions. [2018-07-23 15:33:37,012 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 428 transitions. Word has length 425 [2018-07-23 15:33:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:37,013 INFO L471 AbstractCegarLoop]: Abstraction has 428 states and 428 transitions. [2018-07-23 15:33:37,013 INFO L472 AbstractCegarLoop]: Interpolant automaton has 214 states. [2018-07-23 15:33:37,013 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 428 transitions. [2018-07-23 15:33:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2018-07-23 15:33:37,014 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:37,014 INFO L353 BasicCegarLoop]: trace histogram [213, 212, 1, 1] [2018-07-23 15:33:37,014 INFO L414 AbstractCegarLoop]: === Iteration 213 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:37,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1734116216, now seen corresponding path program 212 times [2018-07-23 15:33:37,014 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 45156 backedges. 0 proven. 45156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:38,720 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:38,721 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [213] total 213 [2018-07-23 15:33:38,721 INFO L450 AbstractCegarLoop]: Interpolant automaton has 215 states [2018-07-23 15:33:38,725 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2018-07-23 15:33:38,727 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23005, Invalid=23005, Unknown=0, NotChecked=0, Total=46010 [2018-07-23 15:33:38,727 INFO L87 Difference]: Start difference. First operand 428 states and 428 transitions. Second operand 215 states. [2018-07-23 15:33:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:40,774 INFO L93 Difference]: Finished difference Result 431 states and 431 transitions. [2018-07-23 15:33:40,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2018-07-23 15:33:40,774 INFO L78 Accepts]: Start accepts. Automaton has 215 states. Word has length 427 [2018-07-23 15:33:40,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:40,775 INFO L225 Difference]: With dead ends: 431 [2018-07-23 15:33:40,775 INFO L226 Difference]: Without dead ends: 430 [2018-07-23 15:33:40,779 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23005, Invalid=23005, Unknown=0, NotChecked=0, Total=46010 [2018-07-23 15:33:40,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2018-07-23 15:33:40,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 430. [2018-07-23 15:33:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2018-07-23 15:33:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 430 transitions. [2018-07-23 15:33:40,784 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 430 transitions. Word has length 427 [2018-07-23 15:33:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:40,784 INFO L471 AbstractCegarLoop]: Abstraction has 430 states and 430 transitions. [2018-07-23 15:33:40,784 INFO L472 AbstractCegarLoop]: Interpolant automaton has 215 states. [2018-07-23 15:33:40,784 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 430 transitions. [2018-07-23 15:33:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2018-07-23 15:33:40,785 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:40,785 INFO L353 BasicCegarLoop]: trace histogram [214, 213, 1, 1] [2018-07-23 15:33:40,786 INFO L414 AbstractCegarLoop]: === Iteration 214 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:40,786 INFO L82 PathProgramCache]: Analyzing trace with hash -38371638, now seen corresponding path program 213 times [2018-07-23 15:33:40,786 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 45582 backedges. 0 proven. 45582 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:42,664 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:42,664 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [214] total 214 [2018-07-23 15:33:42,664 INFO L450 AbstractCegarLoop]: Interpolant automaton has 216 states [2018-07-23 15:33:42,666 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2018-07-23 15:33:42,667 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23220, Invalid=23220, Unknown=0, NotChecked=0, Total=46440 [2018-07-23 15:33:42,667 INFO L87 Difference]: Start difference. First operand 430 states and 430 transitions. Second operand 216 states. [2018-07-23 15:33:45,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:45,602 INFO L93 Difference]: Finished difference Result 433 states and 433 transitions. [2018-07-23 15:33:45,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2018-07-23 15:33:45,602 INFO L78 Accepts]: Start accepts. Automaton has 216 states. Word has length 429 [2018-07-23 15:33:45,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:45,603 INFO L225 Difference]: With dead ends: 433 [2018-07-23 15:33:45,603 INFO L226 Difference]: Without dead ends: 432 [2018-07-23 15:33:45,604 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23220, Invalid=23220, Unknown=0, NotChecked=0, Total=46440 [2018-07-23 15:33:45,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2018-07-23 15:33:45,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2018-07-23 15:33:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2018-07-23 15:33:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 432 transitions. [2018-07-23 15:33:45,609 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 432 transitions. Word has length 429 [2018-07-23 15:33:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:45,609 INFO L471 AbstractCegarLoop]: Abstraction has 432 states and 432 transitions. [2018-07-23 15:33:45,609 INFO L472 AbstractCegarLoop]: Interpolant automaton has 216 states. [2018-07-23 15:33:45,609 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 432 transitions. [2018-07-23 15:33:45,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2018-07-23 15:33:45,611 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:45,611 INFO L353 BasicCegarLoop]: trace histogram [215, 214, 1, 1] [2018-07-23 15:33:45,611 INFO L414 AbstractCegarLoop]: === Iteration 215 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:45,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1779562636, now seen corresponding path program 214 times [2018-07-23 15:33:45,611 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 46010 backedges. 0 proven. 46010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:47,454 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:47,454 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [215] total 215 [2018-07-23 15:33:47,455 INFO L450 AbstractCegarLoop]: Interpolant automaton has 217 states [2018-07-23 15:33:47,459 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 217 interpolants. [2018-07-23 15:33:47,462 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23436, Invalid=23436, Unknown=0, NotChecked=0, Total=46872 [2018-07-23 15:33:47,462 INFO L87 Difference]: Start difference. First operand 432 states and 432 transitions. Second operand 217 states. [2018-07-23 15:33:48,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:48,303 INFO L93 Difference]: Finished difference Result 435 states and 435 transitions. [2018-07-23 15:33:48,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2018-07-23 15:33:48,304 INFO L78 Accepts]: Start accepts. Automaton has 217 states. Word has length 431 [2018-07-23 15:33:48,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:48,304 INFO L225 Difference]: With dead ends: 435 [2018-07-23 15:33:48,304 INFO L226 Difference]: Without dead ends: 434 [2018-07-23 15:33:48,307 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23436, Invalid=23436, Unknown=0, NotChecked=0, Total=46872 [2018-07-23 15:33:48,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-07-23 15:33:48,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-07-23 15:33:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-07-23 15:33:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 434 transitions. [2018-07-23 15:33:48,311 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 434 transitions. Word has length 431 [2018-07-23 15:33:48,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:48,311 INFO L471 AbstractCegarLoop]: Abstraction has 434 states and 434 transitions. [2018-07-23 15:33:48,311 INFO L472 AbstractCegarLoop]: Interpolant automaton has 217 states. [2018-07-23 15:33:48,311 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 434 transitions. [2018-07-23 15:33:48,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2018-07-23 15:33:48,313 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:48,313 INFO L353 BasicCegarLoop]: trace histogram [216, 215, 1, 1] [2018-07-23 15:33:48,313 INFO L414 AbstractCegarLoop]: === Iteration 216 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:48,313 INFO L82 PathProgramCache]: Analyzing trace with hash 762710478, now seen corresponding path program 215 times [2018-07-23 15:33:48,313 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 46440 backedges. 0 proven. 46440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:49,944 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:49,944 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [216] total 216 [2018-07-23 15:33:49,945 INFO L450 AbstractCegarLoop]: Interpolant automaton has 218 states [2018-07-23 15:33:49,948 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2018-07-23 15:33:49,950 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23653, Invalid=23653, Unknown=0, NotChecked=0, Total=47306 [2018-07-23 15:33:49,951 INFO L87 Difference]: Start difference. First operand 434 states and 434 transitions. Second operand 218 states. [2018-07-23 15:33:52,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:52,741 INFO L93 Difference]: Finished difference Result 437 states and 437 transitions. [2018-07-23 15:33:52,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2018-07-23 15:33:52,741 INFO L78 Accepts]: Start accepts. Automaton has 218 states. Word has length 433 [2018-07-23 15:33:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:52,742 INFO L225 Difference]: With dead ends: 437 [2018-07-23 15:33:52,742 INFO L226 Difference]: Without dead ends: 436 [2018-07-23 15:33:52,746 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23653, Invalid=23653, Unknown=0, NotChecked=0, Total=47306 [2018-07-23 15:33:52,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2018-07-23 15:33:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2018-07-23 15:33:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-07-23 15:33:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 436 transitions. [2018-07-23 15:33:52,752 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 436 transitions. Word has length 433 [2018-07-23 15:33:52,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:52,752 INFO L471 AbstractCegarLoop]: Abstraction has 436 states and 436 transitions. [2018-07-23 15:33:52,752 INFO L472 AbstractCegarLoop]: Interpolant automaton has 218 states. [2018-07-23 15:33:52,752 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 436 transitions. [2018-07-23 15:33:52,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-07-23 15:33:52,754 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:52,754 INFO L353 BasicCegarLoop]: trace histogram [217, 216, 1, 1] [2018-07-23 15:33:52,754 INFO L414 AbstractCegarLoop]: === Iteration 217 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:52,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1474637168, now seen corresponding path program 216 times [2018-07-23 15:33:52,754 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 46872 backedges. 0 proven. 46872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:54,689 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:54,689 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [217] total 217 [2018-07-23 15:33:54,689 INFO L450 AbstractCegarLoop]: Interpolant automaton has 219 states [2018-07-23 15:33:54,691 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 219 interpolants. [2018-07-23 15:33:54,692 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23871, Invalid=23871, Unknown=0, NotChecked=0, Total=47742 [2018-07-23 15:33:54,693 INFO L87 Difference]: Start difference. First operand 436 states and 436 transitions. Second operand 219 states. [2018-07-23 15:33:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:57,340 INFO L93 Difference]: Finished difference Result 439 states and 439 transitions. [2018-07-23 15:33:57,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2018-07-23 15:33:57,340 INFO L78 Accepts]: Start accepts. Automaton has 219 states. Word has length 435 [2018-07-23 15:33:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:57,341 INFO L225 Difference]: With dead ends: 439 [2018-07-23 15:33:57,341 INFO L226 Difference]: Without dead ends: 438 [2018-07-23 15:33:57,343 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=23871, Invalid=23871, Unknown=0, NotChecked=0, Total=47742 [2018-07-23 15:33:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2018-07-23 15:33:57,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2018-07-23 15:33:57,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2018-07-23 15:33:57,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 438 transitions. [2018-07-23 15:33:57,347 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 438 transitions. Word has length 435 [2018-07-23 15:33:57,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:57,347 INFO L471 AbstractCegarLoop]: Abstraction has 438 states and 438 transitions. [2018-07-23 15:33:57,348 INFO L472 AbstractCegarLoop]: Interpolant automaton has 219 states. [2018-07-23 15:33:57,348 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 438 transitions. [2018-07-23 15:33:57,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2018-07-23 15:33:57,349 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:57,349 INFO L353 BasicCegarLoop]: trace histogram [218, 217, 1, 1] [2018-07-23 15:33:57,349 INFO L414 AbstractCegarLoop]: === Iteration 218 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:33:57,349 INFO L82 PathProgramCache]: Analyzing trace with hash 212890322, now seen corresponding path program 217 times [2018-07-23 15:33:57,349 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 47306 backedges. 0 proven. 47306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:59,259 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:59,259 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [218] total 218 [2018-07-23 15:33:59,260 INFO L450 AbstractCegarLoop]: Interpolant automaton has 220 states [2018-07-23 15:33:59,264 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 220 interpolants. [2018-07-23 15:33:59,267 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24090, Invalid=24090, Unknown=0, NotChecked=0, Total=48180 [2018-07-23 15:33:59,267 INFO L87 Difference]: Start difference. First operand 438 states and 438 transitions. Second operand 220 states. [2018-07-23 15:34:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:00,807 INFO L93 Difference]: Finished difference Result 441 states and 441 transitions. [2018-07-23 15:34:00,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2018-07-23 15:34:00,808 INFO L78 Accepts]: Start accepts. Automaton has 220 states. Word has length 437 [2018-07-23 15:34:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:00,808 INFO L225 Difference]: With dead ends: 441 [2018-07-23 15:34:00,809 INFO L226 Difference]: Without dead ends: 440 [2018-07-23 15:34:00,812 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24090, Invalid=24090, Unknown=0, NotChecked=0, Total=48180 [2018-07-23 15:34:00,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2018-07-23 15:34:00,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2018-07-23 15:34:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2018-07-23 15:34:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 440 transitions. [2018-07-23 15:34:00,816 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 440 transitions. Word has length 437 [2018-07-23 15:34:00,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:00,816 INFO L471 AbstractCegarLoop]: Abstraction has 440 states and 440 transitions. [2018-07-23 15:34:00,816 INFO L472 AbstractCegarLoop]: Interpolant automaton has 220 states. [2018-07-23 15:34:00,816 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 440 transitions. [2018-07-23 15:34:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2018-07-23 15:34:00,818 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:00,818 INFO L353 BasicCegarLoop]: trace histogram [219, 218, 1, 1] [2018-07-23 15:34:00,818 INFO L414 AbstractCegarLoop]: === Iteration 219 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:34:00,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1570829676, now seen corresponding path program 218 times [2018-07-23 15:34:00,818 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 47742 backedges. 0 proven. 47742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:02,831 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:02,831 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [219] total 219 [2018-07-23 15:34:02,832 INFO L450 AbstractCegarLoop]: Interpolant automaton has 221 states [2018-07-23 15:34:02,835 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2018-07-23 15:34:02,838 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24310, Invalid=24310, Unknown=0, NotChecked=0, Total=48620 [2018-07-23 15:34:02,838 INFO L87 Difference]: Start difference. First operand 440 states and 440 transitions. Second operand 221 states. [2018-07-23 15:34:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:05,762 INFO L93 Difference]: Finished difference Result 443 states and 443 transitions. [2018-07-23 15:34:05,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2018-07-23 15:34:05,762 INFO L78 Accepts]: Start accepts. Automaton has 221 states. Word has length 439 [2018-07-23 15:34:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:05,763 INFO L225 Difference]: With dead ends: 443 [2018-07-23 15:34:05,763 INFO L226 Difference]: Without dead ends: 442 [2018-07-23 15:34:05,768 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24310, Invalid=24310, Unknown=0, NotChecked=0, Total=48620 [2018-07-23 15:34:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2018-07-23 15:34:05,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2018-07-23 15:34:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2018-07-23 15:34:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 442 transitions. [2018-07-23 15:34:05,772 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 442 transitions. Word has length 439 [2018-07-23 15:34:05,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:05,773 INFO L471 AbstractCegarLoop]: Abstraction has 442 states and 442 transitions. [2018-07-23 15:34:05,773 INFO L472 AbstractCegarLoop]: Interpolant automaton has 221 states. [2018-07-23 15:34:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 442 transitions. [2018-07-23 15:34:05,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2018-07-23 15:34:05,774 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:05,774 INFO L353 BasicCegarLoop]: trace histogram [220, 219, 1, 1] [2018-07-23 15:34:05,774 INFO L414 AbstractCegarLoop]: === Iteration 220 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:34:05,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2033796650, now seen corresponding path program 219 times [2018-07-23 15:34:05,775 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 48180 backedges. 0 proven. 48180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:07,838 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:07,838 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [220] total 220 [2018-07-23 15:34:07,838 INFO L450 AbstractCegarLoop]: Interpolant automaton has 222 states [2018-07-23 15:34:07,840 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 222 interpolants. [2018-07-23 15:34:07,841 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24531, Invalid=24531, Unknown=0, NotChecked=0, Total=49062 [2018-07-23 15:34:07,842 INFO L87 Difference]: Start difference. First operand 442 states and 442 transitions. Second operand 222 states. [2018-07-23 15:34:10,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:10,813 INFO L93 Difference]: Finished difference Result 445 states and 445 transitions. [2018-07-23 15:34:10,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2018-07-23 15:34:10,813 INFO L78 Accepts]: Start accepts. Automaton has 222 states. Word has length 441 [2018-07-23 15:34:10,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:10,814 INFO L225 Difference]: With dead ends: 445 [2018-07-23 15:34:10,814 INFO L226 Difference]: Without dead ends: 444 [2018-07-23 15:34:10,815 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=24531, Invalid=24531, Unknown=0, NotChecked=0, Total=49062 [2018-07-23 15:34:10,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2018-07-23 15:34:10,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2018-07-23 15:34:10,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2018-07-23 15:34:10,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 444 transitions. [2018-07-23 15:34:10,819 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 444 transitions. Word has length 441 [2018-07-23 15:34:10,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:10,819 INFO L471 AbstractCegarLoop]: Abstraction has 444 states and 444 transitions. [2018-07-23 15:34:10,819 INFO L472 AbstractCegarLoop]: Interpolant automaton has 222 states. [2018-07-23 15:34:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 444 transitions. [2018-07-23 15:34:10,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-07-23 15:34:10,821 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:10,821 INFO L353 BasicCegarLoop]: trace histogram [221, 220, 1, 1] [2018-07-23 15:34:10,821 INFO L414 AbstractCegarLoop]: === Iteration 221 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:34:10,821 INFO L82 PathProgramCache]: Analyzing trace with hash -268459880, now seen corresponding path program 220 times [2018-07-23 15:34:10,821 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 48620 backedges. 0 proven. 48620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:12,696 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:12,696 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [221] total 221 [2018-07-23 15:34:12,697 INFO L450 AbstractCegarLoop]: Interpolant automaton has 223 states [2018-07-23 15:34:12,701 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 223 interpolants. [2018-07-23 15:34:12,704 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24753, Invalid=24753, Unknown=0, NotChecked=0, Total=49506 [2018-07-23 15:34:12,704 INFO L87 Difference]: Start difference. First operand 444 states and 444 transitions. Second operand 223 states. [2018-07-23 15:34:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:15,888 INFO L93 Difference]: Finished difference Result 447 states and 447 transitions. [2018-07-23 15:34:15,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2018-07-23 15:34:15,888 INFO L78 Accepts]: Start accepts. Automaton has 223 states. Word has length 443 [2018-07-23 15:34:15,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:15,889 INFO L225 Difference]: With dead ends: 447 [2018-07-23 15:34:15,889 INFO L226 Difference]: Without dead ends: 446 [2018-07-23 15:34:15,893 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24753, Invalid=24753, Unknown=0, NotChecked=0, Total=49506 [2018-07-23 15:34:15,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2018-07-23 15:34:15,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2018-07-23 15:34:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 446 states. [2018-07-23 15:34:15,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 446 transitions. [2018-07-23 15:34:15,897 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 446 transitions. Word has length 443 [2018-07-23 15:34:15,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:15,898 INFO L471 AbstractCegarLoop]: Abstraction has 446 states and 446 transitions. [2018-07-23 15:34:15,898 INFO L472 AbstractCegarLoop]: Interpolant automaton has 223 states. [2018-07-23 15:34:15,898 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 446 transitions. [2018-07-23 15:34:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2018-07-23 15:34:15,899 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:15,899 INFO L353 BasicCegarLoop]: trace histogram [222, 221, 1, 1] [2018-07-23 15:34:15,900 INFO L414 AbstractCegarLoop]: === Iteration 222 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:34:15,900 INFO L82 PathProgramCache]: Analyzing trace with hash -291905830, now seen corresponding path program 221 times [2018-07-23 15:34:15,900 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 49062 backedges. 0 proven. 49062 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:17,803 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:17,803 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [222] total 222 [2018-07-23 15:34:17,804 INFO L450 AbstractCegarLoop]: Interpolant automaton has 224 states [2018-07-23 15:34:17,808 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2018-07-23 15:34:17,810 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24976, Invalid=24976, Unknown=0, NotChecked=0, Total=49952 [2018-07-23 15:34:17,811 INFO L87 Difference]: Start difference. First operand 446 states and 446 transitions. Second operand 224 states. [2018-07-23 15:34:19,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:19,613 INFO L93 Difference]: Finished difference Result 449 states and 449 transitions. [2018-07-23 15:34:19,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2018-07-23 15:34:19,613 INFO L78 Accepts]: Start accepts. Automaton has 224 states. Word has length 445 [2018-07-23 15:34:19,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:19,614 INFO L225 Difference]: With dead ends: 449 [2018-07-23 15:34:19,614 INFO L226 Difference]: Without dead ends: 448 [2018-07-23 15:34:19,618 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24976, Invalid=24976, Unknown=0, NotChecked=0, Total=49952 [2018-07-23 15:34:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2018-07-23 15:34:19,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2018-07-23 15:34:19,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-07-23 15:34:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 448 transitions. [2018-07-23 15:34:19,622 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 448 transitions. Word has length 445 [2018-07-23 15:34:19,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:19,622 INFO L471 AbstractCegarLoop]: Abstraction has 448 states and 448 transitions. [2018-07-23 15:34:19,622 INFO L472 AbstractCegarLoop]: Interpolant automaton has 224 states. [2018-07-23 15:34:19,622 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 448 transitions. [2018-07-23 15:34:19,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-07-23 15:34:19,624 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:19,624 INFO L353 BasicCegarLoop]: trace histogram [223, 222, 1, 1] [2018-07-23 15:34:19,624 INFO L414 AbstractCegarLoop]: === Iteration 223 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:34:19,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1348627300, now seen corresponding path program 222 times [2018-07-23 15:34:19,624 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 49506 backedges. 0 proven. 49506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:21,686 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:21,686 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [223] total 223 [2018-07-23 15:34:21,686 INFO L450 AbstractCegarLoop]: Interpolant automaton has 225 states [2018-07-23 15:34:21,689 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 225 interpolants. [2018-07-23 15:34:21,691 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25200, Invalid=25200, Unknown=0, NotChecked=0, Total=50400 [2018-07-23 15:34:21,692 INFO L87 Difference]: Start difference. First operand 448 states and 448 transitions. Second operand 225 states. [2018-07-23 15:34:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:22,767 INFO L93 Difference]: Finished difference Result 451 states and 451 transitions. [2018-07-23 15:34:22,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2018-07-23 15:34:22,768 INFO L78 Accepts]: Start accepts. Automaton has 225 states. Word has length 447 [2018-07-23 15:34:22,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:22,768 INFO L225 Difference]: With dead ends: 451 [2018-07-23 15:34:22,768 INFO L226 Difference]: Without dead ends: 450 [2018-07-23 15:34:22,771 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=25200, Invalid=25200, Unknown=0, NotChecked=0, Total=50400 [2018-07-23 15:34:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2018-07-23 15:34:22,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 450. [2018-07-23 15:34:22,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2018-07-23 15:34:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 450 transitions. [2018-07-23 15:34:22,775 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 450 transitions. Word has length 447 [2018-07-23 15:34:22,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:22,775 INFO L471 AbstractCegarLoop]: Abstraction has 450 states and 450 transitions. [2018-07-23 15:34:22,775 INFO L472 AbstractCegarLoop]: Interpolant automaton has 225 states. [2018-07-23 15:34:22,775 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 450 transitions. [2018-07-23 15:34:22,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2018-07-23 15:34:22,776 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:22,777 INFO L353 BasicCegarLoop]: trace histogram [224, 223, 1, 1] [2018-07-23 15:34:22,777 INFO L414 AbstractCegarLoop]: === Iteration 224 === [procErr0AssertViolationASSERT]=== [2018-07-23 15:34:22,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1049289182, now seen corresponding path program 223 times [2018-07-23 15:34:22,777 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-07-23 15:34:24,065 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 15:34:24,071 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 15:34:24,072 INFO L202 PluginConnector]: Adding new model LargeConstant-ForwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 03:34:24 BoogieIcfgContainer [2018-07-23 15:34:24,072 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 15:34:24,073 INFO L168 Benchmark]: Toolchain (without parser) took 258266.20 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 376.2 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-07-23 15:34:24,074 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.50 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:34:24,074 INFO L168 Benchmark]: Boogie Preprocessor took 57.79 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:34:24,074 INFO L168 Benchmark]: RCFGBuilder took 187.99 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-23 15:34:24,075 INFO L168 Benchmark]: TraceAbstraction took 258015.69 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 365.6 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-07-23 15:34:24,077 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 0.50 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 57.79 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 187.99 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 258015.69 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 365.6 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 18]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 18). Cancelled while BasicCegarLoop was analyzing trace of length 450 with TraceHistMax 224, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 186 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 257.9s OverallTime, 224 OverallIterations, 224 TraceHistogramMax, 115.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 670 SDtfs, 1 SDslu, 24977 SDs, 0 SdLazy, 36657 SolverSat, 468 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24976 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24976 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=450occurred in iteration=223, 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: 1.1s AutomataMinimizationTime, 223 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 27.2s SatisfiabilityAnalysisTime, 101.0s InterpolantComputationTime, 50175 NumberOfCodeBlocks, 50175 NumberOfCodeBlocksAsserted, 223 NumberOfCheckSat, 49952 ConstructedInterpolants, 0 QuantifiedInterpolants, 44657088 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 223 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3696448 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/LargeConstant-ForwardSuccess.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_15-34-24-086.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LargeConstant-ForwardSuccess.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_15-34-24-086.csv Completed graceful shutdown