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/20170304-DifficultPathPrograms/count_by_2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 15:23:17,915 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 15:23:17,917 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 15:23:17,939 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 15:23:17,940 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 15:23:17,941 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 15:23:17,943 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 15:23:17,945 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 15:23:17,948 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 15:23:17,948 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 15:23:17,950 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-07-23 15:23:17,983 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 15:23:17,983 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 15:23:17,986 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 15:23:17,987 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 15:23:17,988 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 15:23:17,989 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 15:23:17,990 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 15:23:17,990 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 15:23:17,991 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-07-23 15:23:17,996 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 15:23:18,021 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 15:23:18,021 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 15:23:18,023 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 15:23:18,023 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 15:23:18,023 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 15:23:18,023 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 15:23:18,024 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 15:23:18,024 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 15:23:18,083 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 15:23:18,097 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 15:23:18,104 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 15:23:18,105 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 15:23:18,106 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 15:23:18,107 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl [2018-07-23 15:23:18,108 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl' [2018-07-23 15:23:18,170 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 15:23:18,171 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 15:23:18,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 15:23:18,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 15:23:18,172 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 15:23:18,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:18" (1/1) ... [2018-07-23 15:23:18,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:18" (1/1) ... [2018-07-23 15:23:18,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:18" (1/1) ... [2018-07-23 15:23:18,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:18" (1/1) ... [2018-07-23 15:23:18,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:18" (1/1) ... [2018-07-23 15:23:18,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:18" (1/1) ... [2018-07-23 15:23:18,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:18" (1/1) ... [2018-07-23 15:23:18,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 15:23:18,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 15:23:18,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 15:23:18,221 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 15:23:18,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:18" (1/1) ... [2018-07-23 15:23:18,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 15:23:18,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 15:23:18,421 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 15:23:18,421 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:23:18 BoogieIcfgContainer [2018-07-23 15:23:18,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 15:23:18,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 15:23:18,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 15:23:18,426 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 15:23:18,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:18" (1/2) ... [2018-07-23 15:23:18,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bace79e and model type count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 03:23:18, skipping insertion in model container [2018-07-23 15:23:18,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:23:18" (2/2) ... [2018-07-23 15:23:18,430 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_2.i_3.bpl [2018-07-23 15:23:18,440 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 15:23:18,448 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 15:23:18,501 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 15:23:18,502 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 15:23:18,502 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 15:23:18,502 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 15:23:18,502 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 15:23:18,503 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 15:23:18,503 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 15:23:18,503 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 15:23:18,503 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 15:23:18,520 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-07-23 15:23:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-23 15:23:18,534 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:18,535 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-23 15:23:18,536 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:18,544 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-07-23 15:23:18,551 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:18,635 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 15:23:18,640 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:23:18,640 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 15:23:18,645 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 15:23:18,661 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 15:23:18,662 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:23:18,666 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-07-23 15:23:18,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:18,707 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2018-07-23 15:23:18,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 15:23:18,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-07-23 15:23:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:18,733 INFO L225 Difference]: With dead ends: 10 [2018-07-23 15:23:18,735 INFO L226 Difference]: Without dead ends: 7 [2018-07-23 15:23:18,743 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:23:18,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-23 15:23:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-23 15:23:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-23 15:23:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-23 15:23:18,788 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-07-23 15:23:18,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:18,788 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-23 15:23:18,788 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 15:23:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-23 15:23:18,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 15:23:18,789 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:18,789 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-07-23 15:23:18,790 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:18,790 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-07-23 15:23:18,793 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:18,826 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 15:23:18,826 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:18,827 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-23 15:23:18,829 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:23:18,829 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:23:18,829 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:23:18,830 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-07-23 15:23:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:18,846 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-07-23 15:23:18,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:23:18,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-07-23 15:23:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:18,848 INFO L225 Difference]: With dead ends: 11 [2018-07-23 15:23:18,848 INFO L226 Difference]: Without dead ends: 9 [2018-07-23 15:23:18,849 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:23:18,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-23 15:23:18,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-23 15:23:18,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 15:23:18,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-23 15:23:18,853 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-07-23 15:23:18,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:18,853 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-23 15:23:18,853 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:23:18,854 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-23 15:23:18,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-23 15:23:18,854 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:18,854 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-07-23 15:23:18,855 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:18,855 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-07-23 15:23:18,855 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:18,884 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 15:23:18,884 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:18,884 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:23:18,885 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 15:23:18,885 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 15:23:18,885 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:23:18,886 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-07-23 15:23:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:18,900 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-07-23 15:23:18,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 15:23:18,900 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-07-23 15:23:18,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:18,901 INFO L225 Difference]: With dead ends: 13 [2018-07-23 15:23:18,901 INFO L226 Difference]: Without dead ends: 11 [2018-07-23 15:23:18,902 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:23:18,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-07-23 15:23:18,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-07-23 15:23:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-23 15:23:18,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-23 15:23:18,906 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-07-23 15:23:18,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:18,906 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-23 15:23:18,906 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 15:23:18,906 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-23 15:23:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 15:23:18,907 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:18,907 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-07-23 15:23:18,907 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:18,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-07-23 15:23:18,908 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:18,952 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 15:23:18,952 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:18,952 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:23:18,953 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:23:18,953 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:23:18,953 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:23:18,954 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-07-23 15:23:18,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:18,971 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-07-23 15:23:18,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:23:18,972 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-07-23 15:23:18,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:18,973 INFO L225 Difference]: With dead ends: 15 [2018-07-23 15:23:18,973 INFO L226 Difference]: Without dead ends: 13 [2018-07-23 15:23:18,974 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:23:18,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-23 15:23:18,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-07-23 15:23:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-07-23 15:23:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-07-23 15:23:18,978 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-07-23 15:23:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:18,978 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-07-23 15:23:18,978 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:23:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-07-23 15:23:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-07-23 15:23:18,979 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:18,979 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-07-23 15:23:18,980 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:18,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-07-23 15:23:18,980 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:19,020 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 15:23:19,021 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:19,021 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-23 15:23:19,021 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 15:23:19,022 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 15:23:19,022 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:23:19,022 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-07-23 15:23:19,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:19,053 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-07-23 15:23:19,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 15:23:19,056 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-07-23 15:23:19,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:19,057 INFO L225 Difference]: With dead ends: 17 [2018-07-23 15:23:19,057 INFO L226 Difference]: Without dead ends: 15 [2018-07-23 15:23:19,059 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 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 15:23:19,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-23 15:23:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-07-23 15:23:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-07-23 15:23:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-07-23 15:23:19,068 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-07-23 15:23:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:19,069 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-07-23 15:23:19,069 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 15:23:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-07-23 15:23:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-23 15:23:19,070 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:19,070 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-07-23 15:23:19,072 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:19,073 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-07-23 15:23:19,073 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:19,143 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 15:23:19,143 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:19,144 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-23 15:23:19,144 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 15:23:19,144 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 15:23:19,145 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:23:19,145 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-07-23 15:23:19,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:19,162 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-07-23 15:23:19,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 15:23:19,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-07-23 15:23:19,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:19,164 INFO L225 Difference]: With dead ends: 19 [2018-07-23 15:23:19,164 INFO L226 Difference]: Without dead ends: 17 [2018-07-23 15:23:19,165 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:23:19,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-07-23 15:23:19,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-07-23 15:23:19,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-23 15:23:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-07-23 15:23:19,169 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-07-23 15:23:19,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:19,170 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-07-23 15:23:19,170 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 15:23:19,170 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-07-23 15:23:19,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-23 15:23:19,171 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:19,171 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-07-23 15:23:19,171 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:19,172 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-07-23 15:23:19,172 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:19,262 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 15:23:19,262 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:19,262 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-23 15:23:19,263 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 15:23:19,263 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 15:23:19,263 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:23:19,264 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-07-23 15:23:19,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:19,305 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-07-23 15:23:19,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 15:23:19,306 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-07-23 15:23:19,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:19,310 INFO L225 Difference]: With dead ends: 21 [2018-07-23 15:23:19,310 INFO L226 Difference]: Without dead ends: 19 [2018-07-23 15:23:19,311 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:23:19,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-07-23 15:23:19,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-07-23 15:23:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-07-23 15:23:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-07-23 15:23:19,320 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-07-23 15:23:19,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:19,320 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-07-23 15:23:19,321 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 15:23:19,321 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-07-23 15:23:19,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-07-23 15:23:19,322 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:19,322 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-07-23 15:23:19,322 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:19,322 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-07-23 15:23:19,322 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:19,390 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 15:23:19,390 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:19,391 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 15:23:19,391 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 15:23:19,391 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 15:23:19,392 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:23:19,392 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-07-23 15:23:19,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:19,413 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-07-23 15:23:19,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 15:23:19,414 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-07-23 15:23:19,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:19,416 INFO L225 Difference]: With dead ends: 23 [2018-07-23 15:23:19,417 INFO L226 Difference]: Without dead ends: 21 [2018-07-23 15:23:19,417 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:23:19,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-23 15:23:19,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-07-23 15:23:19,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-07-23 15:23:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-07-23 15:23:19,424 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-07-23 15:23:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:19,425 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-07-23 15:23:19,425 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 15:23:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-07-23 15:23:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-23 15:23:19,426 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:19,426 INFO L353 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-07-23 15:23:19,426 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:19,426 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-07-23 15:23:19,427 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:19,468 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 15:23:19,469 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:19,469 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-23 15:23:19,469 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 15:23:19,470 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 15:23:19,470 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:23:19,470 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-07-23 15:23:19,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:19,505 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-07-23 15:23:19,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 15:23:19,505 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-07-23 15:23:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:19,506 INFO L225 Difference]: With dead ends: 25 [2018-07-23 15:23:19,506 INFO L226 Difference]: Without dead ends: 23 [2018-07-23 15:23:19,507 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:23:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-07-23 15:23:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-07-23 15:23:19,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-23 15:23:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-07-23 15:23:19,513 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-07-23 15:23:19,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:19,513 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-07-23 15:23:19,513 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 15:23:19,513 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-07-23 15:23:19,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 15:23:19,516 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:19,516 INFO L353 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-07-23 15:23:19,517 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:19,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-07-23 15:23:19,517 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:19,592 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 15:23:19,592 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:19,593 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-23 15:23:19,593 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 15:23:19,594 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 15:23:19,594 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:23:19,596 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-07-23 15:23:19,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:19,626 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-07-23 15:23:19,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 15:23:19,626 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-07-23 15:23:19,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:19,627 INFO L225 Difference]: With dead ends: 27 [2018-07-23 15:23:19,627 INFO L226 Difference]: Without dead ends: 25 [2018-07-23 15:23:19,629 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 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 15:23:19,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-07-23 15:23:19,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-07-23 15:23:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-23 15:23:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-07-23 15:23:19,637 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-07-23 15:23:19,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:19,638 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-07-23 15:23:19,638 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 15:23:19,638 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-07-23 15:23:19,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-07-23 15:23:19,639 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:19,640 INFO L353 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-07-23 15:23:19,640 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:19,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-07-23 15:23:19,640 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:19,701 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 15:23:19,701 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:19,702 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-07-23 15:23:19,702 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 15:23:19,702 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 15:23:19,703 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:23:19,703 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-07-23 15:23:19,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:19,720 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-07-23 15:23:19,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 15:23:19,720 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-07-23 15:23:19,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:19,721 INFO L225 Difference]: With dead ends: 29 [2018-07-23 15:23:19,721 INFO L226 Difference]: Without dead ends: 27 [2018-07-23 15:23:19,722 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:23:19,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-23 15:23:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-07-23 15:23:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-07-23 15:23:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-07-23 15:23:19,728 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-07-23 15:23:19,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:19,728 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-07-23 15:23:19,728 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 15:23:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-07-23 15:23:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-23 15:23:19,729 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:19,730 INFO L353 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-07-23 15:23:19,730 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:19,730 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-07-23 15:23:19,730 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:19,777 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 15:23:19,778 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:19,778 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-23 15:23:19,778 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 15:23:19,779 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 15:23:19,779 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:23:19,779 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-07-23 15:23:19,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:19,795 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-07-23 15:23:19,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 15:23:19,795 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-07-23 15:23:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:19,796 INFO L225 Difference]: With dead ends: 31 [2018-07-23 15:23:19,796 INFO L226 Difference]: Without dead ends: 29 [2018-07-23 15:23:19,797 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:23:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-07-23 15:23:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-07-23 15:23:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-23 15:23:19,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-07-23 15:23:19,803 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-07-23 15:23:19,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:19,803 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-07-23 15:23:19,803 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 15:23:19,803 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-07-23 15:23:19,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-23 15:23:19,804 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:19,805 INFO L353 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-07-23 15:23:19,805 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:19,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-07-23 15:23:19,805 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:19,852 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 15:23:19,853 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:19,853 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-07-23 15:23:19,854 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 15:23:19,854 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 15:23:19,854 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:23:19,855 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-07-23 15:23:19,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:19,876 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-07-23 15:23:19,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 15:23:19,876 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-07-23 15:23:19,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:19,877 INFO L225 Difference]: With dead ends: 33 [2018-07-23 15:23:19,880 INFO L226 Difference]: Without dead ends: 31 [2018-07-23 15:23:19,881 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 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 15:23:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-07-23 15:23:19,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-07-23 15:23:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-07-23 15:23:19,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-07-23 15:23:19,890 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-07-23 15:23:19,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:19,896 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-07-23 15:23:19,896 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 15:23:19,896 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-07-23 15:23:19,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-23 15:23:19,897 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:19,897 INFO L353 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-07-23 15:23:19,897 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:19,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-07-23 15:23:19,898 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:19,961 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 15:23:19,961 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:19,962 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-23 15:23:19,962 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 15:23:19,962 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 15:23:19,963 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:23:19,963 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-07-23 15:23:19,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:19,982 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-07-23 15:23:19,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 15:23:19,983 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-07-23 15:23:19,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:19,984 INFO L225 Difference]: With dead ends: 35 [2018-07-23 15:23:19,984 INFO L226 Difference]: Without dead ends: 33 [2018-07-23 15:23:19,985 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 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 15:23:19,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-23 15:23:19,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-07-23 15:23:19,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-07-23 15:23:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-07-23 15:23:19,990 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-07-23 15:23:19,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:19,990 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-07-23 15:23:19,991 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 15:23:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-07-23 15:23:19,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-23 15:23:19,992 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:19,992 INFO L353 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-07-23 15:23:19,992 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:19,992 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-07-23 15:23:19,993 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:20,056 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 15:23:20,056 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:20,057 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-07-23 15:23:20,057 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 15:23:20,058 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 15:23:20,058 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:23:20,058 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-07-23 15:23:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:20,081 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-07-23 15:23:20,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 15:23:20,082 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-07-23 15:23:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:20,083 INFO L225 Difference]: With dead ends: 37 [2018-07-23 15:23:20,083 INFO L226 Difference]: Without dead ends: 35 [2018-07-23 15:23:20,083 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 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 15:23:20,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-07-23 15:23:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-07-23 15:23:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-23 15:23:20,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-07-23 15:23:20,089 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-07-23 15:23:20,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:20,089 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-07-23 15:23:20,090 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 15:23:20,090 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-07-23 15:23:20,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-23 15:23:20,091 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:20,091 INFO L353 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-07-23 15:23:20,091 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:20,092 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-07-23 15:23:20,092 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:20,151 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 15:23:20,151 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:20,151 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-07-23 15:23:20,152 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 15:23:20,152 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 15:23:20,153 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:23:20,153 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-07-23 15:23:20,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:20,177 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-07-23 15:23:20,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 15:23:20,180 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-07-23 15:23:20,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:20,181 INFO L225 Difference]: With dead ends: 39 [2018-07-23 15:23:20,181 INFO L226 Difference]: Without dead ends: 37 [2018-07-23 15:23:20,182 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 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 15:23:20,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-07-23 15:23:20,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-07-23 15:23:20,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-07-23 15:23:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-07-23 15:23:20,191 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-07-23 15:23:20,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:20,192 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-07-23 15:23:20,192 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 15:23:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-07-23 15:23:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-07-23 15:23:20,193 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:20,195 INFO L353 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-07-23 15:23:20,196 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:20,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-07-23 15:23:20,196 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:20,266 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 15:23:20,266 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:20,266 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-07-23 15:23:20,267 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 15:23:20,267 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 15:23:20,268 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:23:20,268 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-07-23 15:23:20,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:20,283 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-07-23 15:23:20,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 15:23:20,284 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-07-23 15:23:20,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:20,285 INFO L225 Difference]: With dead ends: 41 [2018-07-23 15:23:20,285 INFO L226 Difference]: Without dead ends: 39 [2018-07-23 15:23:20,286 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 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 15:23:20,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-23 15:23:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-07-23 15:23:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-07-23 15:23:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-07-23 15:23:20,291 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-07-23 15:23:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:20,292 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-07-23 15:23:20,292 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 15:23:20,292 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-07-23 15:23:20,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-23 15:23:20,293 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:20,293 INFO L353 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-07-23 15:23:20,293 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:20,294 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-07-23 15:23:20,294 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:20,372 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 15:23:20,372 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:20,373 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-07-23 15:23:20,373 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 15:23:20,373 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 15:23:20,374 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:23:20,374 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-07-23 15:23:20,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:20,400 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-07-23 15:23:20,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 15:23:20,401 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-07-23 15:23:20,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:20,403 INFO L225 Difference]: With dead ends: 43 [2018-07-23 15:23:20,403 INFO L226 Difference]: Without dead ends: 41 [2018-07-23 15:23:20,404 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 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 15:23:20,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-07-23 15:23:20,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-07-23 15:23:20,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-07-23 15:23:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-07-23 15:23:20,419 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-07-23 15:23:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:20,420 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-07-23 15:23:20,420 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 15:23:20,420 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-07-23 15:23:20,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-23 15:23:20,421 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:20,421 INFO L353 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-07-23 15:23:20,421 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:20,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-07-23 15:23:20,422 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:20,511 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 15:23:20,512 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:20,512 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-07-23 15:23:20,512 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 15:23:20,513 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 15:23:20,513 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:23:20,513 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-07-23 15:23:20,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:20,542 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-07-23 15:23:20,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 15:23:20,543 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-07-23 15:23:20,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:20,544 INFO L225 Difference]: With dead ends: 45 [2018-07-23 15:23:20,544 INFO L226 Difference]: Without dead ends: 43 [2018-07-23 15:23:20,545 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 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 15:23:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-07-23 15:23:20,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-07-23 15:23:20,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-07-23 15:23:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-07-23 15:23:20,552 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-07-23 15:23:20,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:20,552 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-07-23 15:23:20,552 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 15:23:20,553 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-07-23 15:23:20,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-07-23 15:23:20,553 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:20,554 INFO L353 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-07-23 15:23:20,554 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:20,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-07-23 15:23:20,556 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:20,633 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 15:23:20,633 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:20,634 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-07-23 15:23:20,634 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 15:23:20,634 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 15:23:20,635 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:23:20,635 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-07-23 15:23:20,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:20,653 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-07-23 15:23:20,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 15:23:20,654 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-07-23 15:23:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:20,654 INFO L225 Difference]: With dead ends: 47 [2018-07-23 15:23:20,655 INFO L226 Difference]: Without dead ends: 45 [2018-07-23 15:23:20,655 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 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 15:23:20,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-07-23 15:23:20,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-07-23 15:23:20,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-07-23 15:23:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-07-23 15:23:20,669 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-07-23 15:23:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:20,669 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-07-23 15:23:20,670 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 15:23:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-07-23 15:23:20,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-23 15:23:20,670 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:20,671 INFO L353 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-07-23 15:23:20,671 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:20,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-07-23 15:23:20,671 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:20,759 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 15:23:20,759 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:20,760 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-07-23 15:23:20,760 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 15:23:20,761 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 15:23:20,761 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:23:20,763 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-07-23 15:23:20,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:20,783 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-07-23 15:23:20,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 15:23:20,784 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-07-23 15:23:20,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:20,784 INFO L225 Difference]: With dead ends: 49 [2018-07-23 15:23:20,785 INFO L226 Difference]: Without dead ends: 47 [2018-07-23 15:23:20,785 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 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 15:23:20,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-07-23 15:23:20,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-07-23 15:23:20,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-23 15:23:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-07-23 15:23:20,793 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-07-23 15:23:20,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:20,793 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-07-23 15:23:20,793 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 15:23:20,793 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-07-23 15:23:20,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-23 15:23:20,794 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:20,797 INFO L353 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-07-23 15:23:20,798 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:20,798 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-07-23 15:23:20,798 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:20,915 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 15:23:20,916 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:20,916 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-07-23 15:23:20,916 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 15:23:20,917 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 15:23:20,917 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:23:20,918 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-07-23 15:23:20,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:20,933 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-07-23 15:23:20,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 15:23:20,934 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-07-23 15:23:20,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:20,935 INFO L225 Difference]: With dead ends: 51 [2018-07-23 15:23:20,935 INFO L226 Difference]: Without dead ends: 49 [2018-07-23 15:23:20,936 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 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 15:23:20,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-07-23 15:23:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-07-23 15:23:20,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-07-23 15:23:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-07-23 15:23:20,945 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-07-23 15:23:20,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:20,946 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-07-23 15:23:20,946 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 15:23:20,946 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-07-23 15:23:20,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-07-23 15:23:20,947 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:20,947 INFO L353 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-07-23 15:23:20,947 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:20,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-07-23 15:23:20,953 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:21,075 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 15:23:21,076 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:21,076 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-07-23 15:23:21,076 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 15:23:21,077 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 15:23:21,077 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:23:21,077 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-07-23 15:23:21,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:21,102 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-07-23 15:23:21,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-23 15:23:21,102 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-07-23 15:23:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:21,107 INFO L225 Difference]: With dead ends: 53 [2018-07-23 15:23:21,107 INFO L226 Difference]: Without dead ends: 51 [2018-07-23 15:23:21,108 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 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 15:23:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-07-23 15:23:21,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-07-23 15:23:21,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-07-23 15:23:21,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-07-23 15:23:21,122 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-07-23 15:23:21,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:21,122 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-07-23 15:23:21,123 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 15:23:21,123 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-07-23 15:23:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-23 15:23:21,123 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:21,124 INFO L353 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-07-23 15:23:21,124 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:21,124 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-07-23 15:23:21,124 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:21,239 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 15:23:21,239 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:21,240 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-07-23 15:23:21,240 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 15:23:21,241 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 15:23:21,241 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:23:21,241 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-07-23 15:23:21,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:21,266 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-07-23 15:23:21,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 15:23:21,267 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-07-23 15:23:21,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:21,268 INFO L225 Difference]: With dead ends: 55 [2018-07-23 15:23:21,268 INFO L226 Difference]: Without dead ends: 53 [2018-07-23 15:23:21,268 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 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 15:23:21,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-07-23 15:23:21,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-07-23 15:23:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 15:23:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-07-23 15:23:21,274 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-07-23 15:23:21,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:21,275 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-07-23 15:23:21,275 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 15:23:21,275 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-07-23 15:23:21,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-23 15:23:21,276 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:21,276 INFO L353 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-07-23 15:23:21,276 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:21,277 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-07-23 15:23:21,277 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:21,396 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 15:23:21,397 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:21,397 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-07-23 15:23:21,397 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 15:23:21,398 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 15:23:21,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:23:21,399 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-07-23 15:23:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:21,423 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-07-23 15:23:21,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 15:23:21,424 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-07-23 15:23:21,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:21,424 INFO L225 Difference]: With dead ends: 57 [2018-07-23 15:23:21,425 INFO L226 Difference]: Without dead ends: 55 [2018-07-23 15:23:21,426 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 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 15:23:21,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-07-23 15:23:21,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-07-23 15:23:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-07-23 15:23:21,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-07-23 15:23:21,430 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-07-23 15:23:21,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:21,431 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-07-23 15:23:21,431 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 15:23:21,431 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-07-23 15:23:21,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-07-23 15:23:21,432 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:21,432 INFO L353 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-07-23 15:23:21,432 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:21,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-07-23 15:23:21,432 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:21,550 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 15:23:21,550 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:21,550 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-07-23 15:23:21,551 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 15:23:21,551 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 15:23:21,552 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:23:21,553 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-07-23 15:23:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:21,578 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-07-23 15:23:21,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 15:23:21,578 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-07-23 15:23:21,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:21,579 INFO L225 Difference]: With dead ends: 59 [2018-07-23 15:23:21,579 INFO L226 Difference]: Without dead ends: 57 [2018-07-23 15:23:21,581 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 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 15:23:21,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-23 15:23:21,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-07-23 15:23:21,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-07-23 15:23:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-07-23 15:23:21,587 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-07-23 15:23:21,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:21,588 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-07-23 15:23:21,588 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 15:23:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-07-23 15:23:21,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 15:23:21,589 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:21,589 INFO L353 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-07-23 15:23:21,589 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:21,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-07-23 15:23:21,590 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:21,716 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 15:23:21,716 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:21,717 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-07-23 15:23:21,717 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 15:23:21,718 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 15:23:21,718 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:23:21,719 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-07-23 15:23:21,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:21,740 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-07-23 15:23:21,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 15:23:21,741 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-07-23 15:23:21,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:21,741 INFO L225 Difference]: With dead ends: 61 [2018-07-23 15:23:21,741 INFO L226 Difference]: Without dead ends: 59 [2018-07-23 15:23:21,742 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 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 15:23:21,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-07-23 15:23:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-07-23 15:23:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-07-23 15:23:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-07-23 15:23:21,746 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-07-23 15:23:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:21,747 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-07-23 15:23:21,747 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 15:23:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-07-23 15:23:21,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-23 15:23:21,748 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:21,748 INFO L353 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-07-23 15:23:21,748 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:21,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-07-23 15:23:21,749 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:21,870 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 15:23:21,870 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:21,871 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-07-23 15:23:21,871 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 15:23:21,871 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 15:23:21,872 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:23:21,872 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-07-23 15:23:21,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:21,897 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-07-23 15:23:21,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 15:23:21,900 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-07-23 15:23:21,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:21,900 INFO L225 Difference]: With dead ends: 63 [2018-07-23 15:23:21,901 INFO L226 Difference]: Without dead ends: 61 [2018-07-23 15:23:21,901 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 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 15:23:21,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-07-23 15:23:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-07-23 15:23:21,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-07-23 15:23:21,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-07-23 15:23:21,911 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-07-23 15:23:21,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:21,912 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-07-23 15:23:21,912 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 15:23:21,912 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-07-23 15:23:21,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-07-23 15:23:21,913 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:21,913 INFO L353 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-07-23 15:23:21,913 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:21,913 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-07-23 15:23:21,914 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:22,043 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 15:23:22,043 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:22,043 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-07-23 15:23:22,044 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 15:23:22,044 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 15:23:22,045 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:23:22,045 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-07-23 15:23:22,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:22,062 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-07-23 15:23:22,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 15:23:22,063 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-07-23 15:23:22,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:22,064 INFO L225 Difference]: With dead ends: 65 [2018-07-23 15:23:22,064 INFO L226 Difference]: Without dead ends: 63 [2018-07-23 15:23:22,065 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 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 15:23:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-07-23 15:23:22,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-07-23 15:23:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-07-23 15:23:22,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-07-23 15:23:22,068 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-07-23 15:23:22,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:22,069 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-07-23 15:23:22,069 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 15:23:22,069 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-07-23 15:23:22,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 15:23:22,069 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:22,070 INFO L353 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-07-23 15:23:22,070 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:22,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-07-23 15:23:22,070 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:22,198 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 15:23:22,198 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:22,198 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-07-23 15:23:22,199 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 15:23:22,199 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 15:23:22,200 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:23:22,200 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-07-23 15:23:22,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:22,223 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-07-23 15:23:22,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 15:23:22,223 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-07-23 15:23:22,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:22,224 INFO L225 Difference]: With dead ends: 67 [2018-07-23 15:23:22,224 INFO L226 Difference]: Without dead ends: 65 [2018-07-23 15:23:22,225 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:23:22,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-07-23 15:23:22,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-07-23 15:23:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-07-23 15:23:22,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-07-23 15:23:22,229 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-07-23 15:23:22,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:22,229 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-07-23 15:23:22,229 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 15:23:22,230 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-07-23 15:23:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-23 15:23:22,230 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:22,230 INFO L353 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-07-23 15:23:22,231 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:22,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-07-23 15:23:22,231 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:22,411 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 15:23:22,411 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:22,411 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-07-23 15:23:22,412 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 15:23:22,412 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 15:23:22,413 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:23:22,413 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-07-23 15:23:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:22,431 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-07-23 15:23:22,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-23 15:23:22,431 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-07-23 15:23:22,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:22,432 INFO L225 Difference]: With dead ends: 69 [2018-07-23 15:23:22,432 INFO L226 Difference]: Without dead ends: 67 [2018-07-23 15:23:22,433 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:23:22,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-07-23 15:23:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-07-23 15:23:22,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-07-23 15:23:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-07-23 15:23:22,436 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-07-23 15:23:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:22,437 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-07-23 15:23:22,437 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 15:23:22,437 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-07-23 15:23:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-07-23 15:23:22,437 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:22,437 INFO L353 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-07-23 15:23:22,438 INFO L414 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:22,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-07-23 15:23:22,438 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:22,562 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 15:23:22,562 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:22,562 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-07-23 15:23:22,562 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 15:23:22,563 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 15:23:22,563 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:23:22,564 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-07-23 15:23:22,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:22,581 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-07-23 15:23:22,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 15:23:22,581 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-07-23 15:23:22,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:22,582 INFO L225 Difference]: With dead ends: 71 [2018-07-23 15:23:22,582 INFO L226 Difference]: Without dead ends: 69 [2018-07-23 15:23:22,583 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 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 15:23:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-07-23 15:23:22,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-07-23 15:23:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-07-23 15:23:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-07-23 15:23:22,586 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-07-23 15:23:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:22,586 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-07-23 15:23:22,586 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 15:23:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-07-23 15:23:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 15:23:22,587 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:22,587 INFO L353 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-07-23 15:23:22,587 INFO L414 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:22,588 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-07-23 15:23:22,588 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:22,713 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 15:23:22,713 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:22,713 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-07-23 15:23:22,714 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 15:23:22,714 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 15:23:22,715 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:23:22,715 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-07-23 15:23:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:22,739 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-07-23 15:23:22,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 15:23:22,739 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-07-23 15:23:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:22,740 INFO L225 Difference]: With dead ends: 73 [2018-07-23 15:23:22,740 INFO L226 Difference]: Without dead ends: 71 [2018-07-23 15:23:22,741 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:23:22,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-07-23 15:23:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-07-23 15:23:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 15:23:22,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-07-23 15:23:22,745 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-07-23 15:23:22,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:22,745 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-07-23 15:23:22,745 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 15:23:22,745 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-07-23 15:23:22,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-07-23 15:23:22,746 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:22,746 INFO L353 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-07-23 15:23:22,746 INFO L414 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:22,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-07-23 15:23:22,746 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:22,880 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 15:23:22,880 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:22,881 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-07-23 15:23:22,881 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 15:23:22,881 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 15:23:22,882 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:23:22,882 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-07-23 15:23:22,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:22,902 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-07-23 15:23:22,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 15:23:22,903 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-07-23 15:23:22,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:22,904 INFO L225 Difference]: With dead ends: 75 [2018-07-23 15:23:22,904 INFO L226 Difference]: Without dead ends: 73 [2018-07-23 15:23:22,905 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:23:22,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-07-23 15:23:22,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-07-23 15:23:22,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-07-23 15:23:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-07-23 15:23:22,908 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-07-23 15:23:22,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:22,908 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-07-23 15:23:22,908 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 15:23:22,909 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-07-23 15:23:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-07-23 15:23:22,909 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:22,909 INFO L353 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-07-23 15:23:22,910 INFO L414 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:22,910 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-07-23 15:23:22,910 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:23,052 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 15:23:23,053 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:23,053 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-07-23 15:23:23,053 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 15:23:23,053 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 15:23:23,054 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:23:23,054 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-07-23 15:23:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:23,074 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-07-23 15:23:23,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-23 15:23:23,074 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-07-23 15:23:23,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:23,075 INFO L225 Difference]: With dead ends: 77 [2018-07-23 15:23:23,075 INFO L226 Difference]: Without dead ends: 75 [2018-07-23 15:23:23,076 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:23:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-07-23 15:23:23,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-07-23 15:23:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-07-23 15:23:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-07-23 15:23:23,079 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-07-23 15:23:23,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:23,079 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-07-23 15:23:23,079 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 15:23:23,079 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-07-23 15:23:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 15:23:23,080 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:23,080 INFO L353 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-07-23 15:23:23,080 INFO L414 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:23,080 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-07-23 15:23:23,080 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:23,215 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 15:23:23,216 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:23,216 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-07-23 15:23:23,216 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 15:23:23,216 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 15:23:23,217 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:23:23,217 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-07-23 15:23:23,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:23,242 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-07-23 15:23:23,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 15:23:23,242 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-07-23 15:23:23,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:23,243 INFO L225 Difference]: With dead ends: 79 [2018-07-23 15:23:23,243 INFO L226 Difference]: Without dead ends: 77 [2018-07-23 15:23:23,244 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 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 15:23:23,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-07-23 15:23:23,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-07-23 15:23:23,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-07-23 15:23:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-07-23 15:23:23,247 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-07-23 15:23:23,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:23,248 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-07-23 15:23:23,248 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 15:23:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-07-23 15:23:23,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-07-23 15:23:23,248 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:23,249 INFO L353 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-07-23 15:23:23,249 INFO L414 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:23,249 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-07-23 15:23:23,249 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:23,384 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 15:23:23,384 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:23,384 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-07-23 15:23:23,385 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 15:23:23,385 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 15:23:23,386 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:23:23,386 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-07-23 15:23:23,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:23,407 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-07-23 15:23:23,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 15:23:23,407 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-07-23 15:23:23,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:23,408 INFO L225 Difference]: With dead ends: 81 [2018-07-23 15:23:23,408 INFO L226 Difference]: Without dead ends: 79 [2018-07-23 15:23:23,409 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:23:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-07-23 15:23:23,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-07-23 15:23:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-07-23 15:23:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-07-23 15:23:23,412 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-07-23 15:23:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:23,413 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-07-23 15:23:23,413 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 15:23:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-07-23 15:23:23,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-07-23 15:23:23,414 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:23,414 INFO L353 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-07-23 15:23:23,414 INFO L414 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:23,414 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-07-23 15:23:23,414 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:23,554 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 15:23:23,555 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:23,555 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-07-23 15:23:23,555 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 15:23:23,555 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 15:23:23,556 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:23:23,557 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-07-23 15:23:23,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:23,586 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-07-23 15:23:23,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 15:23:23,586 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-07-23 15:23:23,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:23,587 INFO L225 Difference]: With dead ends: 83 [2018-07-23 15:23:23,587 INFO L226 Difference]: Without dead ends: 81 [2018-07-23 15:23:23,588 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 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 15:23:23,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-07-23 15:23:23,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-07-23 15:23:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-07-23 15:23:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-07-23 15:23:23,594 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-07-23 15:23:23,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:23,594 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-07-23 15:23:23,594 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 15:23:23,594 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-07-23 15:23:23,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 15:23:23,595 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:23,595 INFO L353 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-07-23 15:23:23,595 INFO L414 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:23,595 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-07-23 15:23:23,596 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:23,749 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 15:23:23,750 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:23,750 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-07-23 15:23:23,750 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 15:23:23,751 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 15:23:23,751 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:23:23,752 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-07-23 15:23:23,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:23,778 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-07-23 15:23:23,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 15:23:23,779 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-07-23 15:23:23,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:23,780 INFO L225 Difference]: With dead ends: 85 [2018-07-23 15:23:23,780 INFO L226 Difference]: Without dead ends: 83 [2018-07-23 15:23:23,781 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 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 15:23:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-07-23 15:23:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-07-23 15:23:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-07-23 15:23:23,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-07-23 15:23:23,784 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-07-23 15:23:23,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:23,784 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-07-23 15:23:23,785 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 15:23:23,785 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-07-23 15:23:23,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-07-23 15:23:23,785 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:23,786 INFO L353 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-07-23 15:23:23,786 INFO L414 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:23,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-07-23 15:23:23,786 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:23,945 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 15:23:23,946 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:23,946 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-07-23 15:23:23,946 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 15:23:23,947 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 15:23:23,947 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:23:23,948 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-07-23 15:23:23,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:23,970 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-07-23 15:23:23,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 15:23:23,970 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-07-23 15:23:23,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:23,971 INFO L225 Difference]: With dead ends: 87 [2018-07-23 15:23:23,971 INFO L226 Difference]: Without dead ends: 85 [2018-07-23 15:23:23,972 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 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 15:23:23,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-07-23 15:23:23,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-07-23 15:23:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-07-23 15:23:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-07-23 15:23:23,976 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-07-23 15:23:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:23,976 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-07-23 15:23:23,976 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 15:23:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-07-23 15:23:23,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-07-23 15:23:23,977 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:23,977 INFO L353 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-07-23 15:23:23,977 INFO L414 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:23,977 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-07-23 15:23:23,978 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:24,139 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 15:23:24,140 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:24,140 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-07-23 15:23:24,140 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 15:23:24,141 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 15:23:24,142 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:23:24,142 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-07-23 15:23:24,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:24,167 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-07-23 15:23:24,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 15:23:24,168 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-07-23 15:23:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:24,168 INFO L225 Difference]: With dead ends: 89 [2018-07-23 15:23:24,168 INFO L226 Difference]: Without dead ends: 87 [2018-07-23 15:23:24,170 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 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 15:23:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-07-23 15:23:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-07-23 15:23:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-07-23 15:23:24,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-07-23 15:23:24,174 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-07-23 15:23:24,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:24,175 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-07-23 15:23:24,175 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 15:23:24,175 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-07-23 15:23:24,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-23 15:23:24,176 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:24,176 INFO L353 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-07-23 15:23:24,176 INFO L414 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:24,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-07-23 15:23:24,176 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:24,366 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 15:23:24,367 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:24,367 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-07-23 15:23:24,367 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 15:23:24,368 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 15:23:24,369 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:23:24,369 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-07-23 15:23:24,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:24,404 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-07-23 15:23:24,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 15:23:24,404 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-07-23 15:23:24,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:24,405 INFO L225 Difference]: With dead ends: 91 [2018-07-23 15:23:24,406 INFO L226 Difference]: Without dead ends: 89 [2018-07-23 15:23:24,407 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 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 15:23:24,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-07-23 15:23:24,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-07-23 15:23:24,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 15:23:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-07-23 15:23:24,412 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-07-23 15:23:24,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:24,413 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-07-23 15:23:24,413 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 15:23:24,413 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-07-23 15:23:24,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-07-23 15:23:24,414 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:24,414 INFO L353 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-07-23 15:23:24,414 INFO L414 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:24,414 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-07-23 15:23:24,415 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:24,631 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 15:23:24,632 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:24,632 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-07-23 15:23:24,632 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 15:23:24,633 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 15:23:24,634 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:23:24,634 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-07-23 15:23:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:24,669 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-07-23 15:23:24,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-23 15:23:24,670 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-07-23 15:23:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:24,671 INFO L225 Difference]: With dead ends: 93 [2018-07-23 15:23:24,671 INFO L226 Difference]: Without dead ends: 91 [2018-07-23 15:23:24,674 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 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 15:23:24,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-07-23 15:23:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-07-23 15:23:24,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-07-23 15:23:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-07-23 15:23:24,678 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-07-23 15:23:24,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:24,679 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-07-23 15:23:24,679 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 15:23:24,679 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-07-23 15:23:24,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-07-23 15:23:24,680 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:24,680 INFO L353 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-07-23 15:23:24,680 INFO L414 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:24,680 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-07-23 15:23:24,681 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:24,836 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 15:23:24,837 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:24,837 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-07-23 15:23:24,837 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 15:23:24,838 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 15:23:24,839 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:23:24,839 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-07-23 15:23:24,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:24,865 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-07-23 15:23:24,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 15:23:24,865 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-07-23 15:23:24,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:24,866 INFO L225 Difference]: With dead ends: 95 [2018-07-23 15:23:24,866 INFO L226 Difference]: Without dead ends: 93 [2018-07-23 15:23:24,867 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 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 15:23:24,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-07-23 15:23:24,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-07-23 15:23:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-07-23 15:23:24,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-07-23 15:23:24,871 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-07-23 15:23:24,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:24,872 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-07-23 15:23:24,872 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 15:23:24,872 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-07-23 15:23:24,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-07-23 15:23:24,873 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:24,873 INFO L353 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-07-23 15:23:24,873 INFO L414 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:24,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-07-23 15:23:24,873 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:25,035 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 15:23:25,036 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:25,036 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-07-23 15:23:25,036 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 15:23:25,036 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 15:23:25,037 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:23:25,037 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-07-23 15:23:25,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:25,074 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-07-23 15:23:25,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 15:23:25,075 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-07-23 15:23:25,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:25,075 INFO L225 Difference]: With dead ends: 97 [2018-07-23 15:23:25,076 INFO L226 Difference]: Without dead ends: 95 [2018-07-23 15:23:25,076 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 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 15:23:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-07-23 15:23:25,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-07-23 15:23:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-07-23 15:23:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-07-23 15:23:25,080 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-07-23 15:23:25,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:25,081 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-07-23 15:23:25,081 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 15:23:25,081 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-07-23 15:23:25,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-07-23 15:23:25,082 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:25,082 INFO L353 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-07-23 15:23:25,082 INFO L414 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:25,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-07-23 15:23:25,083 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:25,269 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 15:23:25,270 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:25,270 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-07-23 15:23:25,270 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 15:23:25,271 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 15:23:25,271 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:23:25,272 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-07-23 15:23:25,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:25,321 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-07-23 15:23:25,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 15:23:25,322 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-07-23 15:23:25,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:25,322 INFO L225 Difference]: With dead ends: 99 [2018-07-23 15:23:25,323 INFO L226 Difference]: Without dead ends: 97 [2018-07-23 15:23:25,323 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 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 15:23:25,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-07-23 15:23:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-07-23 15:23:25,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-07-23 15:23:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-07-23 15:23:25,327 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-07-23 15:23:25,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:25,328 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-07-23 15:23:25,328 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 15:23:25,328 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-07-23 15:23:25,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-07-23 15:23:25,329 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:25,329 INFO L353 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-07-23 15:23:25,329 INFO L414 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:25,329 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-07-23 15:23:25,330 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:25,520 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 15:23:25,520 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:25,520 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-07-23 15:23:25,521 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 15:23:25,521 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 15:23:25,522 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:23:25,522 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-07-23 15:23:25,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:25,561 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-07-23 15:23:25,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 15:23:25,561 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-07-23 15:23:25,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:25,562 INFO L225 Difference]: With dead ends: 101 [2018-07-23 15:23:25,562 INFO L226 Difference]: Without dead ends: 99 [2018-07-23 15:23:25,563 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 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 15:23:25,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-07-23 15:23:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-07-23 15:23:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-07-23 15:23:25,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-07-23 15:23:25,567 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-07-23 15:23:25,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:25,568 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-07-23 15:23:25,568 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 15:23:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-07-23 15:23:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-07-23 15:23:25,569 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:25,569 INFO L353 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-07-23 15:23:25,569 INFO L414 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:25,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-07-23 15:23:25,569 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:25,747 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 15:23:25,747 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:25,747 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-07-23 15:23:25,748 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 15:23:25,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 15:23:25,749 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:23:25,749 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-07-23 15:23:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:25,788 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-07-23 15:23:25,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 15:23:25,788 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-07-23 15:23:25,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:25,790 INFO L225 Difference]: With dead ends: 103 [2018-07-23 15:23:25,790 INFO L226 Difference]: Without dead ends: 101 [2018-07-23 15:23:25,791 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 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 15:23:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-07-23 15:23:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-07-23 15:23:25,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-07-23 15:23:25,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-07-23 15:23:25,797 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-07-23 15:23:25,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:25,797 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-07-23 15:23:25,797 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 15:23:25,797 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-07-23 15:23:25,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-07-23 15:23:25,798 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:25,798 INFO L353 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-07-23 15:23:25,798 INFO L414 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:25,799 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-07-23 15:23:25,799 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:25,981 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 15:23:25,981 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:25,981 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-07-23 15:23:25,982 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 15:23:25,982 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 15:23:25,983 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:23:25,983 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-07-23 15:23:26,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:26,027 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-07-23 15:23:26,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-23 15:23:26,028 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-07-23 15:23:26,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:26,029 INFO L225 Difference]: With dead ends: 105 [2018-07-23 15:23:26,029 INFO L226 Difference]: Without dead ends: 103 [2018-07-23 15:23:26,030 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 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 15:23:26,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-07-23 15:23:26,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-07-23 15:23:26,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-07-23 15:23:26,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-07-23 15:23:26,034 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-07-23 15:23:26,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:26,035 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-07-23 15:23:26,035 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 15:23:26,035 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-07-23 15:23:26,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-07-23 15:23:26,036 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:26,036 INFO L353 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-07-23 15:23:26,037 INFO L414 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:26,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-07-23 15:23:26,037 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:26,219 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 15:23:26,219 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:26,219 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-07-23 15:23:26,220 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 15:23:26,220 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 15:23:26,221 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:23:26,222 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-07-23 15:23:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:26,261 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-07-23 15:23:26,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 15:23:26,261 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-07-23 15:23:26,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:26,262 INFO L225 Difference]: With dead ends: 107 [2018-07-23 15:23:26,262 INFO L226 Difference]: Without dead ends: 105 [2018-07-23 15:23:26,263 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 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 15:23:26,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-07-23 15:23:26,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-07-23 15:23:26,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-07-23 15:23:26,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-07-23 15:23:26,267 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-07-23 15:23:26,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:26,267 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-07-23 15:23:26,267 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 15:23:26,268 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-07-23 15:23:26,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-07-23 15:23:26,269 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:26,269 INFO L353 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-07-23 15:23:26,269 INFO L414 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:26,269 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-07-23 15:23:26,269 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:26,466 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 15:23:26,466 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:26,466 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-07-23 15:23:26,467 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 15:23:26,467 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 15:23:26,468 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:23:26,469 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-07-23 15:23:26,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:26,509 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-07-23 15:23:26,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-23 15:23:26,509 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-07-23 15:23:26,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:26,510 INFO L225 Difference]: With dead ends: 109 [2018-07-23 15:23:26,510 INFO L226 Difference]: Without dead ends: 107 [2018-07-23 15:23:26,511 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 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 15:23:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-07-23 15:23:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-07-23 15:23:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 15:23:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-07-23 15:23:26,518 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-07-23 15:23:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:26,519 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-07-23 15:23:26,519 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 15:23:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-07-23 15:23:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-07-23 15:23:26,520 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:26,520 INFO L353 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-07-23 15:23:26,520 INFO L414 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:26,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-07-23 15:23:26,522 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:26,749 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 15:23:26,750 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:26,750 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-07-23 15:23:26,750 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 15:23:26,751 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 15:23:26,752 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:23:26,752 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-07-23 15:23:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:26,789 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-07-23 15:23:26,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 15:23:26,790 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-07-23 15:23:26,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:26,791 INFO L225 Difference]: With dead ends: 111 [2018-07-23 15:23:26,791 INFO L226 Difference]: Without dead ends: 109 [2018-07-23 15:23:26,792 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 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 15:23:26,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-07-23 15:23:26,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-07-23 15:23:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-07-23 15:23:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-07-23 15:23:26,799 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-07-23 15:23:26,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:26,799 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-07-23 15:23:26,799 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 15:23:26,799 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-07-23 15:23:26,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-07-23 15:23:26,800 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:26,801 INFO L353 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-07-23 15:23:26,801 INFO L414 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:26,801 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-07-23 15:23:26,801 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:27,067 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 15:23:27,067 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:27,067 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-07-23 15:23:27,068 INFO L450 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-23 15:23:27,068 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-23 15:23:27,069 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:23:27,069 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-07-23 15:23:27,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:27,149 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-07-23 15:23:27,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-23 15:23:27,149 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-07-23 15:23:27,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:27,150 INFO L225 Difference]: With dead ends: 113 [2018-07-23 15:23:27,150 INFO L226 Difference]: Without dead ends: 111 [2018-07-23 15:23:27,151 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 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 15:23:27,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-07-23 15:23:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-07-23 15:23:27,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-07-23 15:23:27,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-07-23 15:23:27,155 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-07-23 15:23:27,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:27,155 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-07-23 15:23:27,156 INFO L472 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-23 15:23:27,156 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-07-23 15:23:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-07-23 15:23:27,157 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:27,157 INFO L353 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-07-23 15:23:27,157 INFO L414 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:27,157 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-07-23 15:23:27,160 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:27,362 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 15:23:27,362 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:27,362 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-07-23 15:23:27,363 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 15:23:27,363 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 15:23:27,364 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:23:27,365 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-07-23 15:23:27,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:27,425 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-07-23 15:23:27,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 15:23:27,425 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-07-23 15:23:27,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:27,426 INFO L225 Difference]: With dead ends: 115 [2018-07-23 15:23:27,427 INFO L226 Difference]: Without dead ends: 113 [2018-07-23 15:23:27,428 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 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 15:23:27,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-07-23 15:23:27,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-07-23 15:23:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-07-23 15:23:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-07-23 15:23:27,432 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-07-23 15:23:27,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:27,433 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-07-23 15:23:27,433 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 15:23:27,433 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-07-23 15:23:27,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-07-23 15:23:27,434 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:27,434 INFO L353 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-07-23 15:23:27,434 INFO L414 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:27,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-07-23 15:23:27,434 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:27,637 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 15:23:27,637 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:27,638 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-07-23 15:23:27,638 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 15:23:27,639 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 15:23:27,640 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:23:27,640 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-07-23 15:23:27,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:27,698 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-07-23 15:23:27,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-23 15:23:27,699 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-07-23 15:23:27,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:27,700 INFO L225 Difference]: With dead ends: 117 [2018-07-23 15:23:27,700 INFO L226 Difference]: Without dead ends: 115 [2018-07-23 15:23:27,702 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 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 15:23:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-07-23 15:23:27,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-07-23 15:23:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-07-23 15:23:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-07-23 15:23:27,707 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-07-23 15:23:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:27,707 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-07-23 15:23:27,707 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 15:23:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-07-23 15:23:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-07-23 15:23:27,708 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:27,709 INFO L353 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-07-23 15:23:27,709 INFO L414 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:27,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-07-23 15:23:27,709 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:27,926 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 15:23:27,926 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:27,927 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-07-23 15:23:27,927 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 15:23:27,928 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 15:23:27,929 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:23:27,929 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-07-23 15:23:27,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:27,983 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-07-23 15:23:27,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 15:23:27,983 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-07-23 15:23:27,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:27,984 INFO L225 Difference]: With dead ends: 119 [2018-07-23 15:23:27,984 INFO L226 Difference]: Without dead ends: 117 [2018-07-23 15:23:27,985 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 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 15:23:27,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-07-23 15:23:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-07-23 15:23:27,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-07-23 15:23:27,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-07-23 15:23:27,989 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-07-23 15:23:27,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:27,990 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-07-23 15:23:27,990 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 15:23:27,990 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-07-23 15:23:27,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-07-23 15:23:27,991 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:27,992 INFO L353 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-07-23 15:23:27,992 INFO L414 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:27,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-07-23 15:23:27,992 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:28,208 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 15:23:28,208 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:28,208 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-07-23 15:23:28,209 INFO L450 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-23 15:23:28,213 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-23 15:23:28,214 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:23:28,215 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-07-23 15:23:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:28,257 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-07-23 15:23:28,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 15:23:28,258 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-07-23 15:23:28,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:28,259 INFO L225 Difference]: With dead ends: 121 [2018-07-23 15:23:28,260 INFO L226 Difference]: Without dead ends: 119 [2018-07-23 15:23:28,261 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 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 15:23:28,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-07-23 15:23:28,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-07-23 15:23:28,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-07-23 15:23:28,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-07-23 15:23:28,266 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-07-23 15:23:28,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:28,267 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-07-23 15:23:28,267 INFO L472 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-23 15:23:28,267 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-07-23 15:23:28,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-07-23 15:23:28,268 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:28,268 INFO L353 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-07-23 15:23:28,268 INFO L414 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:28,269 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-07-23 15:23:28,269 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:28,491 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 15:23:28,492 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:28,492 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-07-23 15:23:28,492 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-23 15:23:28,493 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-23 15:23:28,494 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:23:28,494 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-07-23 15:23:28,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:28,553 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-07-23 15:23:28,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 15:23:28,553 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-07-23 15:23:28,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:28,554 INFO L225 Difference]: With dead ends: 123 [2018-07-23 15:23:28,554 INFO L226 Difference]: Without dead ends: 121 [2018-07-23 15:23:28,556 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 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 15:23:28,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-07-23 15:23:28,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-07-23 15:23:28,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-07-23 15:23:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-07-23 15:23:28,560 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-07-23 15:23:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:28,561 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-07-23 15:23:28,561 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-23 15:23:28,561 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-07-23 15:23:28,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-07-23 15:23:28,562 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:28,562 INFO L353 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-07-23 15:23:28,563 INFO L414 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:28,563 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-07-23 15:23:28,563 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:28,807 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 15:23:28,807 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:28,807 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-07-23 15:23:28,808 INFO L450 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-23 15:23:28,808 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-23 15:23:28,809 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:23:28,810 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-07-23 15:23:28,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:28,883 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-07-23 15:23:28,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-23 15:23:28,884 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-07-23 15:23:28,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:28,885 INFO L225 Difference]: With dead ends: 125 [2018-07-23 15:23:28,885 INFO L226 Difference]: Without dead ends: 123 [2018-07-23 15:23:28,886 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 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 15:23:28,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-07-23 15:23:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-07-23 15:23:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-07-23 15:23:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-07-23 15:23:28,891 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-07-23 15:23:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:28,892 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-07-23 15:23:28,892 INFO L472 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-23 15:23:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-07-23 15:23:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-07-23 15:23:28,893 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:28,893 INFO L353 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-07-23 15:23:28,893 INFO L414 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:28,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-07-23 15:23:28,894 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:29,132 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 15:23:29,132 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:29,132 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-07-23 15:23:29,133 INFO L450 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-23 15:23:29,134 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-23 15:23:29,135 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:23:29,136 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-07-23 15:23:29,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:29,195 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-07-23 15:23:29,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 15:23:29,195 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-07-23 15:23:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:29,197 INFO L225 Difference]: With dead ends: 127 [2018-07-23 15:23:29,197 INFO L226 Difference]: Without dead ends: 125 [2018-07-23 15:23:29,198 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:23:29,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-07-23 15:23:29,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-07-23 15:23:29,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 15:23:29,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-07-23 15:23:29,203 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-07-23 15:23:29,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:29,203 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-07-23 15:23:29,203 INFO L472 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-23 15:23:29,203 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-07-23 15:23:29,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-07-23 15:23:29,204 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:29,205 INFO L353 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-07-23 15:23:29,205 INFO L414 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:29,205 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-07-23 15:23:29,205 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:29,482 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 15:23:29,482 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:29,483 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-07-23 15:23:29,483 INFO L450 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-23 15:23:29,484 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-23 15:23:29,485 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:23:29,485 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-07-23 15:23:29,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:29,548 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-07-23 15:23:29,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-23 15:23:29,548 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-07-23 15:23:29,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:29,549 INFO L225 Difference]: With dead ends: 129 [2018-07-23 15:23:29,550 INFO L226 Difference]: Without dead ends: 127 [2018-07-23 15:23:29,551 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 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 15:23:29,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-07-23 15:23:29,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-07-23 15:23:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-07-23 15:23:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-07-23 15:23:29,556 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-07-23 15:23:29,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:29,557 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-07-23 15:23:29,557 INFO L472 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-23 15:23:29,557 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-07-23 15:23:29,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-07-23 15:23:29,558 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:29,558 INFO L353 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-07-23 15:23:29,558 INFO L414 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:29,559 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-07-23 15:23:29,559 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:29,865 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 15:23:29,865 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:29,865 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-07-23 15:23:29,866 INFO L450 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-23 15:23:29,866 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-23 15:23:29,867 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:23:29,868 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-07-23 15:23:29,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:29,935 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-07-23 15:23:29,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 15:23:29,935 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-07-23 15:23:29,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:29,936 INFO L225 Difference]: With dead ends: 131 [2018-07-23 15:23:29,937 INFO L226 Difference]: Without dead ends: 129 [2018-07-23 15:23:29,938 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:23:29,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-07-23 15:23:29,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-07-23 15:23:29,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-07-23 15:23:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-07-23 15:23:29,942 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-07-23 15:23:29,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:29,943 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-07-23 15:23:29,943 INFO L472 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-23 15:23:29,943 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-07-23 15:23:29,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-07-23 15:23:29,944 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:29,944 INFO L353 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-07-23 15:23:29,944 INFO L414 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:29,945 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-07-23 15:23:29,945 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:30,159 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 15:23:30,160 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:30,160 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-07-23 15:23:30,160 INFO L450 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-23 15:23:30,161 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-23 15:23:30,162 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:23:30,162 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-07-23 15:23:30,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:30,233 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-07-23 15:23:30,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-23 15:23:30,234 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-07-23 15:23:30,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:30,235 INFO L225 Difference]: With dead ends: 133 [2018-07-23 15:23:30,235 INFO L226 Difference]: Without dead ends: 131 [2018-07-23 15:23:30,236 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 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 15:23:30,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-07-23 15:23:30,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-07-23 15:23:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-07-23 15:23:30,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-07-23 15:23:30,241 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-07-23 15:23:30,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:30,241 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-07-23 15:23:30,241 INFO L472 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-23 15:23:30,241 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-07-23 15:23:30,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-07-23 15:23:30,243 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:30,243 INFO L353 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-07-23 15:23:30,243 INFO L414 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:30,243 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-07-23 15:23:30,243 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:30,481 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 15:23:30,481 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:30,481 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-07-23 15:23:30,482 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-23 15:23:30,483 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-23 15:23:30,484 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:23:30,485 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-07-23 15:23:30,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:30,539 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-07-23 15:23:30,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 15:23:30,539 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-07-23 15:23:30,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:30,540 INFO L225 Difference]: With dead ends: 135 [2018-07-23 15:23:30,540 INFO L226 Difference]: Without dead ends: 133 [2018-07-23 15:23:30,542 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 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 15:23:30,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-07-23 15:23:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-07-23 15:23:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-07-23 15:23:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-07-23 15:23:30,549 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-07-23 15:23:30,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:30,550 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-07-23 15:23:30,550 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-23 15:23:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-07-23 15:23:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-07-23 15:23:30,556 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:30,556 INFO L353 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-07-23 15:23:30,556 INFO L414 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:30,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-07-23 15:23:30,556 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:30,787 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 15:23:30,787 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:30,787 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-07-23 15:23:30,788 INFO L450 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-23 15:23:30,788 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-23 15:23:30,789 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:23:30,790 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-07-23 15:23:30,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:30,859 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-07-23 15:23:30,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-07-23 15:23:30,860 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-07-23 15:23:30,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:30,861 INFO L225 Difference]: With dead ends: 137 [2018-07-23 15:23:30,861 INFO L226 Difference]: Without dead ends: 135 [2018-07-23 15:23:30,862 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 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 15:23:30,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-07-23 15:23:30,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-07-23 15:23:30,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-07-23 15:23:30,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-07-23 15:23:30,867 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-07-23 15:23:30,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:30,867 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-07-23 15:23:30,867 INFO L472 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-23 15:23:30,867 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-07-23 15:23:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-07-23 15:23:30,869 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:30,869 INFO L353 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-07-23 15:23:30,869 INFO L414 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:30,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-07-23 15:23:30,869 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:31,098 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 15:23:31,099 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:31,099 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-07-23 15:23:31,099 INFO L450 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-23 15:23:31,100 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-23 15:23:31,101 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:23:31,101 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-07-23 15:23:31,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:31,181 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-07-23 15:23:31,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 15:23:31,181 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-07-23 15:23:31,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:31,182 INFO L225 Difference]: With dead ends: 139 [2018-07-23 15:23:31,182 INFO L226 Difference]: Without dead ends: 137 [2018-07-23 15:23:31,183 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 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 15:23:31,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-07-23 15:23:31,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-07-23 15:23:31,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-07-23 15:23:31,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-07-23 15:23:31,188 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-07-23 15:23:31,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:31,188 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-07-23 15:23:31,188 INFO L472 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-23 15:23:31,188 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-07-23 15:23:31,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-07-23 15:23:31,190 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:31,190 INFO L353 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-07-23 15:23:31,190 INFO L414 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:31,190 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-07-23 15:23:31,190 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:31,423 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 15:23:31,423 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:31,424 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-07-23 15:23:31,424 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-23 15:23:31,425 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-23 15:23:31,425 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:23:31,426 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-07-23 15:23:31,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:31,503 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-07-23 15:23:31,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-23 15:23:31,504 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-07-23 15:23:31,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:31,505 INFO L225 Difference]: With dead ends: 141 [2018-07-23 15:23:31,505 INFO L226 Difference]: Without dead ends: 139 [2018-07-23 15:23:31,506 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 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 15:23:31,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-07-23 15:23:31,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-07-23 15:23:31,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-07-23 15:23:31,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-07-23 15:23:31,511 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-07-23 15:23:31,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:31,511 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-07-23 15:23:31,511 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-23 15:23:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-07-23 15:23:31,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-07-23 15:23:31,513 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:31,513 INFO L353 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-07-23 15:23:31,513 INFO L414 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:31,514 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-07-23 15:23:31,514 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:31,757 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 15:23:31,757 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:31,757 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-07-23 15:23:31,758 INFO L450 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-23 15:23:31,758 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-23 15:23:31,759 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:23:31,759 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-07-23 15:23:31,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:31,836 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-07-23 15:23:31,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 15:23:31,837 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-07-23 15:23:31,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:31,838 INFO L225 Difference]: With dead ends: 143 [2018-07-23 15:23:31,838 INFO L226 Difference]: Without dead ends: 141 [2018-07-23 15:23:31,839 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 1 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 15:23:31,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-07-23 15:23:31,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-07-23 15:23:31,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-07-23 15:23:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-07-23 15:23:31,846 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-07-23 15:23:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:31,847 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-07-23 15:23:31,847 INFO L472 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-23 15:23:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-07-23 15:23:31,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-07-23 15:23:31,848 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:31,848 INFO L353 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-07-23 15:23:31,848 INFO L414 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:31,849 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-07-23 15:23:31,849 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:32,111 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 15:23:32,112 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:32,112 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-07-23 15:23:32,112 INFO L450 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-23 15:23:32,113 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-23 15:23:32,114 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:23:32,114 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-07-23 15:23:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:32,184 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-07-23 15:23:32,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-23 15:23:32,184 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-07-23 15:23:32,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:32,185 INFO L225 Difference]: With dead ends: 145 [2018-07-23 15:23:32,185 INFO L226 Difference]: Without dead ends: 143 [2018-07-23 15:23:32,186 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:23:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-07-23 15:23:32,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-07-23 15:23:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-07-23 15:23:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-07-23 15:23:32,191 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-07-23 15:23:32,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:32,191 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-07-23 15:23:32,191 INFO L472 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-23 15:23:32,192 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-07-23 15:23:32,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-07-23 15:23:32,193 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:32,193 INFO L353 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-07-23 15:23:32,193 INFO L414 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:32,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-07-23 15:23:32,194 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:32,442 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 15:23:32,442 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:32,442 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-07-23 15:23:32,443 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 15:23:32,444 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 15:23:32,444 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:23:32,444 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-07-23 15:23:32,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:32,526 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-07-23 15:23:32,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 15:23:32,526 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-07-23 15:23:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:32,527 INFO L225 Difference]: With dead ends: 147 [2018-07-23 15:23:32,527 INFO L226 Difference]: Without dead ends: 145 [2018-07-23 15:23:32,528 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 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 15:23:32,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-07-23 15:23:32,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-07-23 15:23:32,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-07-23 15:23:32,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-07-23 15:23:32,533 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-07-23 15:23:32,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:32,533 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-07-23 15:23:32,533 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 15:23:32,533 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-07-23 15:23:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-07-23 15:23:32,535 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:32,535 INFO L353 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-07-23 15:23:32,535 INFO L414 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:32,535 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-07-23 15:23:32,535 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:32,768 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 15:23:32,769 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:32,769 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-07-23 15:23:32,769 INFO L450 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-23 15:23:32,770 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-23 15:23:32,771 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:23:32,771 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-07-23 15:23:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:32,868 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-07-23 15:23:32,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-07-23 15:23:32,869 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-07-23 15:23:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:32,870 INFO L225 Difference]: With dead ends: 149 [2018-07-23 15:23:32,870 INFO L226 Difference]: Without dead ends: 147 [2018-07-23 15:23:32,872 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 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 15:23:32,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-07-23 15:23:32,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-07-23 15:23:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-07-23 15:23:32,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-07-23 15:23:32,878 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-07-23 15:23:32,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:32,878 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-07-23 15:23:32,878 INFO L472 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-23 15:23:32,878 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-07-23 15:23:32,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-07-23 15:23:32,882 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:32,882 INFO L353 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-07-23 15:23:32,882 INFO L414 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:32,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-07-23 15:23:32,882 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:33,117 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 15:23:33,117 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:33,118 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-07-23 15:23:33,118 INFO L450 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-23 15:23:33,119 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-23 15:23:33,119 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:23:33,119 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-07-23 15:23:33,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:33,213 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-07-23 15:23:33,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 15:23:33,213 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-07-23 15:23:33,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:33,214 INFO L225 Difference]: With dead ends: 151 [2018-07-23 15:23:33,214 INFO L226 Difference]: Without dead ends: 149 [2018-07-23 15:23:33,215 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 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 15:23:33,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-07-23 15:23:33,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-07-23 15:23:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-07-23 15:23:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-07-23 15:23:33,220 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-07-23 15:23:33,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:33,220 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-07-23 15:23:33,220 INFO L472 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-23 15:23:33,220 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-07-23 15:23:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-07-23 15:23:33,222 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:33,222 INFO L353 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-07-23 15:23:33,222 INFO L414 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:33,222 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-07-23 15:23:33,222 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:33,467 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 15:23:33,467 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:33,468 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-07-23 15:23:33,468 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-23 15:23:33,469 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-23 15:23:33,469 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:23:33,470 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-07-23 15:23:33,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:33,542 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-07-23 15:23:33,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-23 15:23:33,542 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-07-23 15:23:33,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:33,543 INFO L225 Difference]: With dead ends: 153 [2018-07-23 15:23:33,543 INFO L226 Difference]: Without dead ends: 151 [2018-07-23 15:23:33,544 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:23:33,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-07-23 15:23:33,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-07-23 15:23:33,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-07-23 15:23:33,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-07-23 15:23:33,550 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-07-23 15:23:33,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:33,550 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-07-23 15:23:33,550 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-23 15:23:33,550 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-07-23 15:23:33,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-07-23 15:23:33,552 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:33,552 INFO L353 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-07-23 15:23:33,552 INFO L414 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:33,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-07-23 15:23:33,552 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:33,798 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 15:23:33,798 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:33,799 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-07-23 15:23:33,799 INFO L450 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-23 15:23:33,800 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-23 15:23:33,800 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:23:33,801 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-07-23 15:23:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:33,874 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-07-23 15:23:33,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 15:23:33,874 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-07-23 15:23:33,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:33,876 INFO L225 Difference]: With dead ends: 155 [2018-07-23 15:23:33,876 INFO L226 Difference]: Without dead ends: 153 [2018-07-23 15:23:33,877 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:23:33,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-07-23 15:23:33,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-07-23 15:23:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-07-23 15:23:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-07-23 15:23:33,883 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-07-23 15:23:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:33,883 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-07-23 15:23:33,883 INFO L472 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-23 15:23:33,883 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-07-23 15:23:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-07-23 15:23:33,884 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:33,885 INFO L353 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-07-23 15:23:33,885 INFO L414 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-07-23 15:23:33,885 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:34,180 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 15:23:34,180 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:34,181 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-07-23 15:23:34,181 INFO L450 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-23 15:23:34,182 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-23 15:23:34,183 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:23:34,183 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-07-23 15:23:34,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:34,307 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-07-23 15:23:34,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-07-23 15:23:34,307 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-07-23 15:23:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:34,309 INFO L225 Difference]: With dead ends: 157 [2018-07-23 15:23:34,309 INFO L226 Difference]: Without dead ends: 155 [2018-07-23 15:23:34,310 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:23:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-07-23 15:23:34,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-07-23 15:23:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-07-23 15:23:34,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-07-23 15:23:34,317 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-07-23 15:23:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:34,317 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-07-23 15:23:34,317 INFO L472 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-23 15:23:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-07-23 15:23:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-07-23 15:23:34,319 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:34,320 INFO L353 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-07-23 15:23:34,320 INFO L414 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:34,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-07-23 15:23:34,320 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:34,684 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 15:23:34,684 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:34,684 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-07-23 15:23:34,685 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-23 15:23:34,686 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-23 15:23:34,686 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:23:34,687 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-07-23 15:23:34,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:34,741 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-07-23 15:23:34,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 15:23:34,742 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-07-23 15:23:34,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:34,743 INFO L225 Difference]: With dead ends: 159 [2018-07-23 15:23:34,743 INFO L226 Difference]: Without dead ends: 157 [2018-07-23 15:23:34,744 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:23:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-07-23 15:23:34,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-07-23 15:23:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-07-23 15:23:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-07-23 15:23:34,750 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-07-23 15:23:34,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:34,751 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-07-23 15:23:34,751 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-23 15:23:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-07-23 15:23:34,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-07-23 15:23:34,752 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:34,753 INFO L353 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-07-23 15:23:34,753 INFO L414 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:34,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-07-23 15:23:34,753 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:34,998 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 15:23:34,998 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:34,998 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-07-23 15:23:34,999 INFO L450 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-23 15:23:34,999 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-23 15:23:35,000 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:23:35,000 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-07-23 15:23:35,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:35,106 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-07-23 15:23:35,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-23 15:23:35,106 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-07-23 15:23:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:35,107 INFO L225 Difference]: With dead ends: 161 [2018-07-23 15:23:35,108 INFO L226 Difference]: Without dead ends: 159 [2018-07-23 15:23:35,108 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 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 15:23:35,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-07-23 15:23:35,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-07-23 15:23:35,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-07-23 15:23:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-07-23 15:23:35,114 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-07-23 15:23:35,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:35,115 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-07-23 15:23:35,115 INFO L472 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-23 15:23:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-07-23 15:23:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-07-23 15:23:35,116 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:35,117 INFO L353 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-07-23 15:23:35,117 INFO L414 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:35,117 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-07-23 15:23:35,117 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:35,365 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 15:23:35,366 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:35,366 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-07-23 15:23:35,366 INFO L450 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-23 15:23:35,367 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-23 15:23:35,368 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:23:35,368 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-07-23 15:23:35,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:35,473 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-07-23 15:23:35,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 15:23:35,474 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-07-23 15:23:35,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:35,475 INFO L225 Difference]: With dead ends: 163 [2018-07-23 15:23:35,475 INFO L226 Difference]: Without dead ends: 161 [2018-07-23 15:23:35,476 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 1 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 15:23:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-07-23 15:23:35,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-07-23 15:23:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-07-23 15:23:35,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-07-23 15:23:35,481 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-07-23 15:23:35,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:35,481 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-07-23 15:23:35,481 INFO L472 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-23 15:23:35,481 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-07-23 15:23:35,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-07-23 15:23:35,482 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:35,482 INFO L353 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-07-23 15:23:35,483 INFO L414 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:35,483 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-07-23 15:23:35,483 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:35,734 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 15:23:35,734 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:35,735 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-07-23 15:23:35,735 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-23 15:23:35,736 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-23 15:23:35,736 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:23:35,736 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-07-23 15:23:35,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:35,796 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-07-23 15:23:35,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-23 15:23:35,796 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-07-23 15:23:35,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:35,797 INFO L225 Difference]: With dead ends: 165 [2018-07-23 15:23:35,797 INFO L226 Difference]: Without dead ends: 163 [2018-07-23 15:23:35,798 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:23:35,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-07-23 15:23:35,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-07-23 15:23:35,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-07-23 15:23:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-07-23 15:23:35,803 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-07-23 15:23:35,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:35,803 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-07-23 15:23:35,803 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-23 15:23:35,804 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-07-23 15:23:35,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-07-23 15:23:35,804 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:35,804 INFO L353 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-07-23 15:23:35,805 INFO L414 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:35,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-07-23 15:23:35,805 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:36,085 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 15:23:36,086 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:36,086 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-07-23 15:23:36,086 INFO L450 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-23 15:23:36,087 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-23 15:23:36,088 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:23:36,088 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-07-23 15:23:36,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:36,210 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-07-23 15:23:36,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 15:23:36,211 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-07-23 15:23:36,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:36,212 INFO L225 Difference]: With dead ends: 167 [2018-07-23 15:23:36,212 INFO L226 Difference]: Without dead ends: 165 [2018-07-23 15:23:36,213 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 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 15:23:36,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-07-23 15:23:36,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-07-23 15:23:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-07-23 15:23:36,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-07-23 15:23:36,217 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-07-23 15:23:36,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:36,218 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-07-23 15:23:36,218 INFO L472 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-23 15:23:36,218 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-07-23 15:23:36,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-07-23 15:23:36,219 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:36,219 INFO L353 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-07-23 15:23:36,219 INFO L414 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:36,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-07-23 15:23:36,220 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:36,501 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 15:23:36,502 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:36,502 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-07-23 15:23:36,502 INFO L450 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-07-23 15:23:36,503 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-07-23 15:23:36,504 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:23:36,504 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-07-23 15:23:36,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:36,658 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-07-23 15:23:36,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-23 15:23:36,659 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-07-23 15:23:36,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:36,660 INFO L225 Difference]: With dead ends: 169 [2018-07-23 15:23:36,660 INFO L226 Difference]: Without dead ends: 167 [2018-07-23 15:23:36,661 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 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 15:23:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-07-23 15:23:36,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-07-23 15:23:36,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-07-23 15:23:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-07-23 15:23:36,666 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-07-23 15:23:36,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:36,666 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-07-23 15:23:36,666 INFO L472 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-07-23 15:23:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-07-23 15:23:36,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-07-23 15:23:36,667 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:36,668 INFO L353 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-07-23 15:23:36,668 INFO L414 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:36,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-07-23 15:23:36,668 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:37,003 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 15:23:37,003 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:37,003 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-07-23 15:23:37,004 INFO L450 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-23 15:23:37,004 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-23 15:23:37,005 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:23:37,005 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-07-23 15:23:37,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:37,153 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-07-23 15:23:37,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 15:23:37,153 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-07-23 15:23:37,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:37,154 INFO L225 Difference]: With dead ends: 171 [2018-07-23 15:23:37,154 INFO L226 Difference]: Without dead ends: 169 [2018-07-23 15:23:37,155 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 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 15:23:37,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-07-23 15:23:37,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-07-23 15:23:37,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-07-23 15:23:37,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-07-23 15:23:37,160 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-07-23 15:23:37,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:37,160 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-07-23 15:23:37,161 INFO L472 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-23 15:23:37,161 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-07-23 15:23:37,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-07-23 15:23:37,162 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:37,162 INFO L353 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-07-23 15:23:37,162 INFO L414 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:37,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-07-23 15:23:37,162 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:37,469 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 15:23:37,470 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:37,470 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-07-23 15:23:37,470 INFO L450 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-07-23 15:23:37,471 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-07-23 15:23:37,472 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:23:37,472 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-07-23 15:23:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:37,645 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-07-23 15:23:37,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-23 15:23:37,646 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-07-23 15:23:37,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:37,647 INFO L225 Difference]: With dead ends: 173 [2018-07-23 15:23:37,647 INFO L226 Difference]: Without dead ends: 171 [2018-07-23 15:23:37,648 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 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 15:23:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-07-23 15:23:37,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-07-23 15:23:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-07-23 15:23:37,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-07-23 15:23:37,653 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-07-23 15:23:37,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:37,653 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-07-23 15:23:37,653 INFO L472 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-07-23 15:23:37,653 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-07-23 15:23:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-07-23 15:23:37,654 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:37,655 INFO L353 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-07-23 15:23:37,655 INFO L414 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:37,655 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-07-23 15:23:37,655 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:37,952 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 15:23:37,952 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:37,953 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-07-23 15:23:37,953 INFO L450 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-23 15:23:37,954 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-23 15:23:37,954 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:23:37,955 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-07-23 15:23:38,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:38,107 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-07-23 15:23:38,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 15:23:38,107 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-07-23 15:23:38,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:38,109 INFO L225 Difference]: With dead ends: 175 [2018-07-23 15:23:38,109 INFO L226 Difference]: Without dead ends: 173 [2018-07-23 15:23:38,109 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 1 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 15:23:38,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-07-23 15:23:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-07-23 15:23:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-07-23 15:23:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-07-23 15:23:38,114 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-07-23 15:23:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:38,114 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-07-23 15:23:38,114 INFO L472 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-23 15:23:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-07-23 15:23:38,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-07-23 15:23:38,115 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:38,116 INFO L353 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-07-23 15:23:38,116 INFO L414 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:38,116 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-07-23 15:23:38,116 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:38,414 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 15:23:38,415 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:38,415 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-07-23 15:23:38,415 INFO L450 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-23 15:23:38,416 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-23 15:23:38,416 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:23:38,417 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-07-23 15:23:38,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:38,568 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-07-23 15:23:38,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-23 15:23:38,569 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-07-23 15:23:38,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:38,570 INFO L225 Difference]: With dead ends: 177 [2018-07-23 15:23:38,570 INFO L226 Difference]: Without dead ends: 175 [2018-07-23 15:23:38,571 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 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 15:23:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-07-23 15:23:38,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-07-23 15:23:38,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-07-23 15:23:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-07-23 15:23:38,577 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-07-23 15:23:38,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:38,578 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-07-23 15:23:38,578 INFO L472 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-23 15:23:38,578 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-07-23 15:23:38,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-07-23 15:23:38,579 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:38,579 INFO L353 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-07-23 15:23:38,579 INFO L414 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:38,579 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-07-23 15:23:38,580 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:38,920 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 15:23:38,920 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:38,920 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-07-23 15:23:38,921 INFO L450 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-23 15:23:38,922 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-23 15:23:38,923 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:23:38,923 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-07-23 15:23:39,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:39,087 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-07-23 15:23:39,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 15:23:39,088 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-07-23 15:23:39,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:39,089 INFO L225 Difference]: With dead ends: 179 [2018-07-23 15:23:39,089 INFO L226 Difference]: Without dead ends: 177 [2018-07-23 15:23:39,090 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 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 15:23:39,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-07-23 15:23:39,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-07-23 15:23:39,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-07-23 15:23:39,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-07-23 15:23:39,096 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-07-23 15:23:39,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:39,097 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-07-23 15:23:39,097 INFO L472 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-23 15:23:39,097 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-07-23 15:23:39,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-07-23 15:23:39,099 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:39,099 INFO L353 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-07-23 15:23:39,099 INFO L414 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:39,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-07-23 15:23:39,099 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:39,496 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 15:23:39,497 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:39,497 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-07-23 15:23:39,498 INFO L450 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-07-23 15:23:39,499 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-07-23 15:23:39,500 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:23:39,500 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-07-23 15:23:39,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:39,590 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-07-23 15:23:39,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-07-23 15:23:39,590 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-07-23 15:23:39,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:39,592 INFO L225 Difference]: With dead ends: 181 [2018-07-23 15:23:39,592 INFO L226 Difference]: Without dead ends: 179 [2018-07-23 15:23:39,593 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 1 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 15:23:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-07-23 15:23:39,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-07-23 15:23:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-07-23 15:23:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-07-23 15:23:39,600 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-07-23 15:23:39,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:39,600 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-07-23 15:23:39,600 INFO L472 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-07-23 15:23:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-07-23 15:23:39,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-07-23 15:23:39,606 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:39,606 INFO L353 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-07-23 15:23:39,606 INFO L414 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:39,607 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-07-23 15:23:39,607 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:40,117 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 15:23:40,117 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:40,118 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-07-23 15:23:40,118 INFO L450 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-23 15:23:40,119 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-23 15:23:40,119 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:23:40,119 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-07-23 15:23:40,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:40,271 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-07-23 15:23:40,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 15:23:40,271 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-07-23 15:23:40,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:40,272 INFO L225 Difference]: With dead ends: 183 [2018-07-23 15:23:40,273 INFO L226 Difference]: Without dead ends: 181 [2018-07-23 15:23:40,273 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:23:40,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-07-23 15:23:40,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-07-23 15:23:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-07-23 15:23:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-07-23 15:23:40,278 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-07-23 15:23:40,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:40,278 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-07-23 15:23:40,278 INFO L472 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-23 15:23:40,278 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-07-23 15:23:40,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-07-23 15:23:40,279 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:40,280 INFO L353 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-07-23 15:23:40,280 INFO L414 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:40,280 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-07-23 15:23:40,280 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:40,602 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 15:23:40,602 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:40,602 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2018-07-23 15:23:40,602 INFO L450 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-07-23 15:23:40,603 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-07-23 15:23:40,604 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:23:40,604 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-07-23 15:23:40,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:40,755 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-07-23 15:23:40,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-07-23 15:23:40,755 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-07-23 15:23:40,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:40,757 INFO L225 Difference]: With dead ends: 185 [2018-07-23 15:23:40,757 INFO L226 Difference]: Without dead ends: 183 [2018-07-23 15:23:40,758 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 1 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 15:23:40,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-07-23 15:23:40,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-07-23 15:23:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-07-23 15:23:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-07-23 15:23:40,762 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-07-23 15:23:40,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:40,763 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-07-23 15:23:40,763 INFO L472 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-07-23 15:23:40,763 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-07-23 15:23:40,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-07-23 15:23:40,764 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:40,764 INFO L353 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-07-23 15:23:40,764 INFO L414 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:40,764 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-07-23 15:23:40,764 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:41,129 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 15:23:41,129 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:41,129 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-07-23 15:23:41,130 INFO L450 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-23 15:23:41,131 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-23 15:23:41,131 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:23:41,132 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-07-23 15:23:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:41,275 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-07-23 15:23:41,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 15:23:41,275 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-07-23 15:23:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:41,276 INFO L225 Difference]: With dead ends: 187 [2018-07-23 15:23:41,276 INFO L226 Difference]: Without dead ends: 185 [2018-07-23 15:23:41,277 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 1 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 15:23:41,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-07-23 15:23:41,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-07-23 15:23:41,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-07-23 15:23:41,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-07-23 15:23:41,282 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-07-23 15:23:41,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:41,283 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-07-23 15:23:41,283 INFO L472 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-23 15:23:41,283 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-07-23 15:23:41,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-07-23 15:23:41,284 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:41,284 INFO L353 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-07-23 15:23:41,284 INFO L414 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:41,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-07-23 15:23:41,284 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:41,682 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 15:23:41,682 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:41,682 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-07-23 15:23:41,683 INFO L450 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-23 15:23:41,684 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-23 15:23:41,684 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:23:41,684 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-07-23 15:23:41,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:41,878 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-07-23 15:23:41,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-07-23 15:23:41,878 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-07-23 15:23:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:41,879 INFO L225 Difference]: With dead ends: 189 [2018-07-23 15:23:41,879 INFO L226 Difference]: Without dead ends: 187 [2018-07-23 15:23:41,880 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:23:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-07-23 15:23:41,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-07-23 15:23:41,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-07-23 15:23:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-07-23 15:23:41,885 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-07-23 15:23:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:41,885 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-07-23 15:23:41,885 INFO L472 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-23 15:23:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-07-23 15:23:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-07-23 15:23:41,886 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:41,887 INFO L353 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-07-23 15:23:41,887 INFO L414 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:41,887 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-07-23 15:23:41,887 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:42,250 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 15:23:42,250 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:42,250 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-07-23 15:23:42,251 INFO L450 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-23 15:23:42,252 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-23 15:23:42,252 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:23:42,252 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-07-23 15:23:42,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:42,396 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-07-23 15:23:42,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 15:23:42,396 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-07-23 15:23:42,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:42,397 INFO L225 Difference]: With dead ends: 191 [2018-07-23 15:23:42,397 INFO L226 Difference]: Without dead ends: 189 [2018-07-23 15:23:42,398 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 1 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 15:23:42,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-07-23 15:23:42,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-07-23 15:23:42,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-07-23 15:23:42,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-07-23 15:23:42,402 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-07-23 15:23:42,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:42,403 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-07-23 15:23:42,403 INFO L472 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-23 15:23:42,403 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-07-23 15:23:42,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-07-23 15:23:42,404 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:42,404 INFO L353 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-07-23 15:23:42,404 INFO L414 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:42,404 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-07-23 15:23:42,404 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:42,728 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 15:23:42,728 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:42,728 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2018-07-23 15:23:42,729 INFO L450 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-07-23 15:23:42,729 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-07-23 15:23:42,730 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:23:42,730 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-07-23 15:23:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:42,807 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-07-23 15:23:42,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-07-23 15:23:42,808 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-07-23 15:23:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:42,809 INFO L225 Difference]: With dead ends: 193 [2018-07-23 15:23:42,809 INFO L226 Difference]: Without dead ends: 191 [2018-07-23 15:23:42,810 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:23:42,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-07-23 15:23:42,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-07-23 15:23:42,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-07-23 15:23:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-07-23 15:23:42,817 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-07-23 15:23:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:42,818 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-07-23 15:23:42,818 INFO L472 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-07-23 15:23:42,818 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-07-23 15:23:42,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-07-23 15:23:42,819 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:42,819 INFO L353 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-07-23 15:23:42,819 INFO L414 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:42,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-07-23 15:23:42,819 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:43,140 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 15:23:43,140 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:43,140 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-07-23 15:23:43,140 INFO L450 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-23 15:23:43,141 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-23 15:23:43,142 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:23:43,142 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-07-23 15:23:43,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:43,312 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-07-23 15:23:43,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-23 15:23:43,312 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-07-23 15:23:43,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:43,314 INFO L225 Difference]: With dead ends: 195 [2018-07-23 15:23:43,314 INFO L226 Difference]: Without dead ends: 193 [2018-07-23 15:23:43,318 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 1 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 15:23:43,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-07-23 15:23:43,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-07-23 15:23:43,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-07-23 15:23:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-07-23 15:23:43,328 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-07-23 15:23:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:43,329 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-07-23 15:23:43,329 INFO L472 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-23 15:23:43,329 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-07-23 15:23:43,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-07-23 15:23:43,330 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:43,330 INFO L353 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-07-23 15:23:43,330 INFO L414 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:43,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-07-23 15:23:43,331 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:43,612 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 15:23:43,613 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:43,613 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-07-23 15:23:43,613 INFO L450 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-07-23 15:23:43,614 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-07-23 15:23:43,615 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:23:43,615 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-07-23 15:23:43,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:43,747 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-07-23 15:23:43,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-23 15:23:43,747 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-07-23 15:23:43,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:43,748 INFO L225 Difference]: With dead ends: 197 [2018-07-23 15:23:43,748 INFO L226 Difference]: Without dead ends: 195 [2018-07-23 15:23:43,749 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:23:43,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-07-23 15:23:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-07-23 15:23:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-07-23 15:23:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-07-23 15:23:43,754 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-07-23 15:23:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:43,754 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-07-23 15:23:43,754 INFO L472 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-07-23 15:23:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-07-23 15:23:43,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-07-23 15:23:43,755 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:43,755 INFO L353 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-07-23 15:23:43,755 INFO L414 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:43,756 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-07-23 15:23:43,756 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:44,059 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 15:23:44,060 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:44,060 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-07-23 15:23:44,060 INFO L450 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-07-23 15:23:44,061 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-07-23 15:23:44,062 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:23:44,062 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-07-23 15:23:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:44,224 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-07-23 15:23:44,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-23 15:23:44,224 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-07-23 15:23:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:44,225 INFO L225 Difference]: With dead ends: 199 [2018-07-23 15:23:44,225 INFO L226 Difference]: Without dead ends: 197 [2018-07-23 15:23:44,226 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:23:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-07-23 15:23:44,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-07-23 15:23:44,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-07-23 15:23:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-07-23 15:23:44,230 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-07-23 15:23:44,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:44,230 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-07-23 15:23:44,230 INFO L472 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-07-23 15:23:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-07-23 15:23:44,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-07-23 15:23:44,231 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:44,232 INFO L353 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-07-23 15:23:44,232 INFO L414 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:44,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-07-23 15:23:44,232 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:44,516 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 15:23:44,516 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:44,516 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2018-07-23 15:23:44,517 INFO L450 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-07-23 15:23:44,517 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-07-23 15:23:44,518 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:23:44,518 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-07-23 15:23:44,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:44,659 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-07-23 15:23:44,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-07-23 15:23:44,659 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-07-23 15:23:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:44,660 INFO L225 Difference]: With dead ends: 201 [2018-07-23 15:23:44,660 INFO L226 Difference]: Without dead ends: 199 [2018-07-23 15:23:44,661 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 1 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 15:23:44,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-07-23 15:23:44,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-07-23 15:23:44,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-07-23 15:23:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-07-23 15:23:44,666 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-07-23 15:23:44,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:44,666 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-07-23 15:23:44,666 INFO L472 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-07-23 15:23:44,666 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-07-23 15:23:44,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-07-23 15:23:44,667 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:44,667 INFO L353 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-07-23 15:23:44,667 INFO L414 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:44,668 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-07-23 15:23:44,668 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:44,928 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 15:23:44,929 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:44,929 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-07-23 15:23:44,929 INFO L450 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-07-23 15:23:44,930 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-07-23 15:23:44,930 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:23:44,931 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-07-23 15:23:45,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:45,079 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-07-23 15:23:45,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-23 15:23:45,079 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-07-23 15:23:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:45,080 INFO L225 Difference]: With dead ends: 203 [2018-07-23 15:23:45,080 INFO L226 Difference]: Without dead ends: 201 [2018-07-23 15:23:45,081 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 1 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 15:23:45,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-07-23 15:23:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-07-23 15:23:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-07-23 15:23:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-07-23 15:23:45,087 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-07-23 15:23:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:45,087 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-07-23 15:23:45,087 INFO L472 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-07-23 15:23:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-07-23 15:23:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-07-23 15:23:45,089 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:45,089 INFO L353 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-07-23 15:23:45,089 INFO L414 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:45,089 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-07-23 15:23:45,090 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:45,476 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 15:23:45,476 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:45,476 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2018-07-23 15:23:45,477 INFO L450 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-07-23 15:23:45,477 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-07-23 15:23:45,478 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:23:45,478 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-07-23 15:23:45,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:45,618 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-07-23 15:23:45,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-07-23 15:23:45,618 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-07-23 15:23:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:45,619 INFO L225 Difference]: With dead ends: 205 [2018-07-23 15:23:45,619 INFO L226 Difference]: Without dead ends: 203 [2018-07-23 15:23:45,620 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:23:45,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-07-23 15:23:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-07-23 15:23:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-07-23 15:23:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-07-23 15:23:45,625 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-07-23 15:23:45,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:45,625 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-07-23 15:23:45,625 INFO L472 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-07-23 15:23:45,626 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-07-23 15:23:45,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-07-23 15:23:45,626 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:45,627 INFO L353 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-07-23 15:23:45,627 INFO L414 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:45,627 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-07-23 15:23:45,627 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:45,924 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 15:23:45,925 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:45,925 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2018-07-23 15:23:45,925 INFO L450 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-07-23 15:23:45,926 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-07-23 15:23:45,927 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:23:45,927 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-07-23 15:23:46,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:46,076 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-07-23 15:23:46,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-23 15:23:46,076 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-07-23 15:23:46,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:46,077 INFO L225 Difference]: With dead ends: 207 [2018-07-23 15:23:46,077 INFO L226 Difference]: Without dead ends: 205 [2018-07-23 15:23:46,078 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 1 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 15:23:46,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-07-23 15:23:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-07-23 15:23:46,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-07-23 15:23:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-07-23 15:23:46,083 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-07-23 15:23:46,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:46,083 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-07-23 15:23:46,083 INFO L472 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-07-23 15:23:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-07-23 15:23:46,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-07-23 15:23:46,084 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:46,084 INFO L353 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-07-23 15:23:46,084 INFO L414 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:46,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-07-23 15:23:46,084 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:46,350 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 15:23:46,350 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:46,350 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2018-07-23 15:23:46,350 INFO L450 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-07-23 15:23:46,351 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-07-23 15:23:46,351 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:23:46,352 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-07-23 15:23:46,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:46,423 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-07-23 15:23:46,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-07-23 15:23:46,423 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-07-23 15:23:46,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:46,424 INFO L225 Difference]: With dead ends: 209 [2018-07-23 15:23:46,424 INFO L226 Difference]: Without dead ends: 207 [2018-07-23 15:23:46,425 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:23:46,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-07-23 15:23:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-07-23 15:23:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-07-23 15:23:46,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-07-23 15:23:46,430 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-07-23 15:23:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:46,431 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-07-23 15:23:46,431 INFO L472 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-07-23 15:23:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-07-23 15:23:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-07-23 15:23:46,432 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:46,432 INFO L353 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-07-23 15:23:46,432 INFO L414 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:46,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-07-23 15:23:46,433 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:46,753 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 15:23:46,754 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:46,754 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2018-07-23 15:23:46,755 INFO L450 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-07-23 15:23:46,756 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-07-23 15:23:46,757 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:23:46,757 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-07-23 15:23:46,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:46,912 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-07-23 15:23:46,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-07-23 15:23:46,912 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-07-23 15:23:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:46,913 INFO L225 Difference]: With dead ends: 211 [2018-07-23 15:23:46,913 INFO L226 Difference]: Without dead ends: 209 [2018-07-23 15:23:46,914 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 1 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 15:23:46,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-07-23 15:23:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-07-23 15:23:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-07-23 15:23:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-07-23 15:23:46,918 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-07-23 15:23:46,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:46,919 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-07-23 15:23:46,919 INFO L472 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-07-23 15:23:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-07-23 15:23:46,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-07-23 15:23:46,919 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:46,920 INFO L353 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-07-23 15:23:46,920 INFO L414 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:46,920 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-07-23 15:23:46,920 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:47,242 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 15:23:47,243 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:47,243 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2018-07-23 15:23:47,243 INFO L450 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-07-23 15:23:47,244 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-07-23 15:23:47,244 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:23:47,245 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-07-23 15:23:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:47,451 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-07-23 15:23:47,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-07-23 15:23:47,451 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-07-23 15:23:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:47,452 INFO L225 Difference]: With dead ends: 213 [2018-07-23 15:23:47,452 INFO L226 Difference]: Without dead ends: 211 [2018-07-23 15:23:47,453 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 1 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 15:23:47,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-07-23 15:23:47,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-07-23 15:23:47,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-07-23 15:23:47,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-07-23 15:23:47,458 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-07-23 15:23:47,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:47,458 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-07-23 15:23:47,458 INFO L472 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-07-23 15:23:47,458 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-07-23 15:23:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-07-23 15:23:47,459 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:47,460 INFO L353 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-07-23 15:23:47,460 INFO L414 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:47,460 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-07-23 15:23:47,460 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:47,796 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 15:23:47,796 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:47,796 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2018-07-23 15:23:47,797 INFO L450 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-07-23 15:23:47,798 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-07-23 15:23:47,798 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:23:47,798 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-07-23 15:23:47,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:47,885 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-07-23 15:23:47,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-07-23 15:23:47,885 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-07-23 15:23:47,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:47,886 INFO L225 Difference]: With dead ends: 215 [2018-07-23 15:23:47,886 INFO L226 Difference]: Without dead ends: 213 [2018-07-23 15:23:47,887 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 1 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 15:23:47,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-07-23 15:23:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-07-23 15:23:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-07-23 15:23:47,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-07-23 15:23:47,891 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-07-23 15:23:47,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:47,892 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-07-23 15:23:47,892 INFO L472 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-07-23 15:23:47,892 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-07-23 15:23:47,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-07-23 15:23:47,893 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:47,893 INFO L353 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-07-23 15:23:47,893 INFO L414 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:47,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-07-23 15:23:47,894 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:48,227 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 15:23:48,228 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:48,228 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2018-07-23 15:23:48,228 INFO L450 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-07-23 15:23:48,229 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-07-23 15:23:48,230 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:23:48,230 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-07-23 15:23:48,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:48,408 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-07-23 15:23:48,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-07-23 15:23:48,408 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-07-23 15:23:48,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:48,409 INFO L225 Difference]: With dead ends: 217 [2018-07-23 15:23:48,409 INFO L226 Difference]: Without dead ends: 215 [2018-07-23 15:23:48,410 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 1 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 15:23:48,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-07-23 15:23:48,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-07-23 15:23:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-07-23 15:23:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-07-23 15:23:48,413 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-07-23 15:23:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:48,414 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-07-23 15:23:48,414 INFO L472 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-07-23 15:23:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-07-23 15:23:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-07-23 15:23:48,414 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:48,414 INFO L353 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-07-23 15:23:48,415 INFO L414 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:48,415 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-07-23 15:23:48,415 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:48,749 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 15:23:48,749 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:48,749 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2018-07-23 15:23:48,749 INFO L450 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-07-23 15:23:48,750 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-07-23 15:23:48,751 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:23:48,751 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 108 states. [2018-07-23 15:23:48,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:48,911 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-07-23 15:23:48,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-07-23 15:23:48,912 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-07-23 15:23:48,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:48,912 INFO L225 Difference]: With dead ends: 219 [2018-07-23 15:23:48,912 INFO L226 Difference]: Without dead ends: 217 [2018-07-23 15:23:48,913 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 1 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 15:23:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-07-23 15:23:48,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-07-23 15:23:48,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-07-23 15:23:48,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-07-23 15:23:48,918 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2018-07-23 15:23:48,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:48,918 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-07-23 15:23:48,918 INFO L472 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-07-23 15:23:48,918 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-07-23 15:23:48,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-07-23 15:23:48,919 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:48,919 INFO L353 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1] [2018-07-23 15:23:48,919 INFO L414 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:48,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1219030453, now seen corresponding path program 106 times [2018-07-23 15:23:48,920 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:49,256 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 15:23:49,256 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:49,257 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2018-07-23 15:23:49,257 INFO L450 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-07-23 15:23:49,258 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-07-23 15:23:49,259 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:23:49,259 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 109 states. [2018-07-23 15:23:49,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:49,480 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-07-23 15:23:49,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-07-23 15:23:49,480 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 216 [2018-07-23 15:23:49,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:49,481 INFO L225 Difference]: With dead ends: 221 [2018-07-23 15:23:49,481 INFO L226 Difference]: Without dead ends: 219 [2018-07-23 15:23:49,483 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:23:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-07-23 15:23:49,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-07-23 15:23:49,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-07-23 15:23:49,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-07-23 15:23:49,487 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2018-07-23 15:23:49,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:49,487 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-07-23 15:23:49,488 INFO L472 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-07-23 15:23:49,488 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-07-23 15:23:49,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-07-23 15:23:49,488 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:49,489 INFO L353 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-07-23 15:23:49,489 INFO L414 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:49,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 107 times [2018-07-23 15:23:49,489 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:49,794 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 15:23:49,794 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:49,795 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2018-07-23 15:23:49,795 INFO L450 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-07-23 15:23:49,796 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-07-23 15:23:49,797 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:23:49,797 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 110 states. [2018-07-23 15:23:50,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:50,034 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-07-23 15:23:50,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-23 15:23:50,034 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-07-23 15:23:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:50,035 INFO L225 Difference]: With dead ends: 223 [2018-07-23 15:23:50,035 INFO L226 Difference]: Without dead ends: 221 [2018-07-23 15:23:50,036 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 1 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 15:23:50,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-07-23 15:23:50,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-07-23 15:23:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-07-23 15:23:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-07-23 15:23:50,040 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2018-07-23 15:23:50,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:50,040 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-07-23 15:23:50,040 INFO L472 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-07-23 15:23:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-07-23 15:23:50,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-07-23 15:23:50,041 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:50,041 INFO L353 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1] [2018-07-23 15:23:50,042 INFO L414 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:50,042 INFO L82 PathProgramCache]: Analyzing trace with hash 949720383, now seen corresponding path program 108 times [2018-07-23 15:23:50,042 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:50,558 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 15:23:50,559 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:50,559 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2018-07-23 15:23:50,559 INFO L450 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-07-23 15:23:50,560 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-07-23 15:23:50,561 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:23:50,561 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 111 states. [2018-07-23 15:23:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:50,765 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-07-23 15:23:50,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-07-23 15:23:50,765 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 220 [2018-07-23 15:23:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:50,766 INFO L225 Difference]: With dead ends: 225 [2018-07-23 15:23:50,766 INFO L226 Difference]: Without dead ends: 223 [2018-07-23 15:23:50,767 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:23:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-07-23 15:23:50,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-07-23 15:23:50,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-07-23 15:23:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-07-23 15:23:50,772 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2018-07-23 15:23:50,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:50,772 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-07-23 15:23:50,772 INFO L472 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-07-23 15:23:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-07-23 15:23:50,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-07-23 15:23:50,773 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:50,774 INFO L353 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1] [2018-07-23 15:23:50,774 INFO L414 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:50,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2146693895, now seen corresponding path program 109 times [2018-07-23 15:23:50,774 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:51,093 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 15:23:51,094 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:51,094 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2018-07-23 15:23:51,094 INFO L450 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-07-23 15:23:51,095 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-07-23 15:23:51,095 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:23:51,096 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 112 states. [2018-07-23 15:23:51,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:51,232 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-07-23 15:23:51,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-07-23 15:23:51,232 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 222 [2018-07-23 15:23:51,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:51,232 INFO L225 Difference]: With dead ends: 227 [2018-07-23 15:23:51,233 INFO L226 Difference]: Without dead ends: 225 [2018-07-23 15:23:51,234 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 1 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 15:23:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-07-23 15:23:51,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-07-23 15:23:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-07-23 15:23:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2018-07-23 15:23:51,237 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2018-07-23 15:23:51,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:51,237 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2018-07-23 15:23:51,237 INFO L472 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-07-23 15:23:51,238 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2018-07-23 15:23:51,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-07-23 15:23:51,238 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:51,238 INFO L353 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1] [2018-07-23 15:23:51,239 INFO L414 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:51,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1388478925, now seen corresponding path program 110 times [2018-07-23 15:23:51,239 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:51,599 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 15:23:51,599 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:51,600 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2018-07-23 15:23:51,600 INFO L450 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-07-23 15:23:51,601 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-07-23 15:23:51,601 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:23:51,602 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 113 states. [2018-07-23 15:23:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:51,747 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-07-23 15:23:51,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-07-23 15:23:51,747 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 224 [2018-07-23 15:23:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:51,748 INFO L225 Difference]: With dead ends: 229 [2018-07-23 15:23:51,748 INFO L226 Difference]: Without dead ends: 227 [2018-07-23 15:23:51,749 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 1 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 15:23:51,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-07-23 15:23:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-07-23 15:23:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-07-23 15:23:51,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-07-23 15:23:51,753 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2018-07-23 15:23:51,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:51,754 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-07-23 15:23:51,754 INFO L472 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-07-23 15:23:51,754 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-07-23 15:23:51,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-07-23 15:23:51,755 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:51,755 INFO L353 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1] [2018-07-23 15:23:51,755 INFO L414 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:51,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1406634221, now seen corresponding path program 111 times [2018-07-23 15:23:51,756 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:52,130 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 15:23:52,130 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:52,130 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2018-07-23 15:23:52,130 INFO L450 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-07-23 15:23:52,131 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-07-23 15:23:52,132 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:23:52,132 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 114 states. [2018-07-23 15:23:52,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:52,270 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2018-07-23 15:23:52,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-07-23 15:23:52,270 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 226 [2018-07-23 15:23:52,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:52,271 INFO L225 Difference]: With dead ends: 231 [2018-07-23 15:23:52,271 INFO L226 Difference]: Without dead ends: 229 [2018-07-23 15:23:52,272 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 1 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 15:23:52,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-07-23 15:23:52,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-07-23 15:23:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-07-23 15:23:52,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2018-07-23 15:23:52,276 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 226 [2018-07-23 15:23:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:52,277 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2018-07-23 15:23:52,277 INFO L472 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-07-23 15:23:52,277 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2018-07-23 15:23:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-07-23 15:23:52,278 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:52,278 INFO L353 BasicCegarLoop]: trace histogram [113, 112, 1, 1, 1] [2018-07-23 15:23:52,278 INFO L414 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:52,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1139159769, now seen corresponding path program 112 times [2018-07-23 15:23:52,278 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:52,638 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 15:23:52,639 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:52,639 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2018-07-23 15:23:52,639 INFO L450 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-07-23 15:23:52,640 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-07-23 15:23:52,641 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:23:52,641 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 115 states. [2018-07-23 15:23:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:52,836 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-07-23 15:23:52,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-07-23 15:23:52,837 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 228 [2018-07-23 15:23:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:52,837 INFO L225 Difference]: With dead ends: 233 [2018-07-23 15:23:52,837 INFO L226 Difference]: Without dead ends: 231 [2018-07-23 15:23:52,838 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 1 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 15:23:52,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-07-23 15:23:52,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-07-23 15:23:52,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-07-23 15:23:52,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-07-23 15:23:52,842 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 228 [2018-07-23 15:23:52,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:52,843 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-07-23 15:23:52,843 INFO L472 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-07-23 15:23:52,843 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-07-23 15:23:52,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-07-23 15:23:52,844 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:52,844 INFO L353 BasicCegarLoop]: trace histogram [114, 113, 1, 1, 1] [2018-07-23 15:23:52,844 INFO L414 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:52,844 INFO L82 PathProgramCache]: Analyzing trace with hash 484174561, now seen corresponding path program 113 times [2018-07-23 15:23:52,844 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:53,245 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 15:23:53,245 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:53,245 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115] total 115 [2018-07-23 15:23:53,246 INFO L450 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-07-23 15:23:53,247 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-07-23 15:23:53,247 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:23:53,247 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 116 states. [2018-07-23 15:23:53,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:53,505 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-07-23 15:23:53,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-07-23 15:23:53,505 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 230 [2018-07-23 15:23:53,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:53,506 INFO L225 Difference]: With dead ends: 235 [2018-07-23 15:23:53,506 INFO L226 Difference]: Without dead ends: 233 [2018-07-23 15:23:53,507 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 1 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 15:23:53,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-07-23 15:23:53,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-07-23 15:23:53,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-07-23 15:23:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-07-23 15:23:53,512 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 230 [2018-07-23 15:23:53,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:53,512 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-07-23 15:23:53,512 INFO L472 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-07-23 15:23:53,512 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-07-23 15:23:53,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-07-23 15:23:53,513 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:53,513 INFO L353 BasicCegarLoop]: trace histogram [115, 114, 1, 1, 1] [2018-07-23 15:23:53,513 INFO L414 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:53,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1435337243, now seen corresponding path program 114 times [2018-07-23 15:23:53,514 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:53,878 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 15:23:53,878 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:53,878 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2018-07-23 15:23:53,878 INFO L450 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-07-23 15:23:53,879 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-07-23 15:23:53,880 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:23:53,880 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 117 states. [2018-07-23 15:23:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:54,174 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-07-23 15:23:54,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-07-23 15:23:54,174 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 232 [2018-07-23 15:23:54,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:54,175 INFO L225 Difference]: With dead ends: 237 [2018-07-23 15:23:54,175 INFO L226 Difference]: Without dead ends: 235 [2018-07-23 15:23:54,176 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 1 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 15:23:54,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-07-23 15:23:54,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-07-23 15:23:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-07-23 15:23:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-07-23 15:23:54,180 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 232 [2018-07-23 15:23:54,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:54,180 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-07-23 15:23:54,180 INFO L472 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-07-23 15:23:54,181 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-07-23 15:23:54,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-07-23 15:23:54,182 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:54,182 INFO L353 BasicCegarLoop]: trace histogram [116, 115, 1, 1, 1] [2018-07-23 15:23:54,182 INFO L414 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:54,182 INFO L82 PathProgramCache]: Analyzing trace with hash 674640597, now seen corresponding path program 115 times [2018-07-23 15:23:54,182 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:54,576 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 15:23:54,576 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:54,576 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117] total 117 [2018-07-23 15:23:54,576 INFO L450 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-07-23 15:23:54,577 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-07-23 15:23:54,578 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:23:54,578 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 118 states. [2018-07-23 15:23:54,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:54,773 INFO L93 Difference]: Finished difference Result 239 states and 239 transitions. [2018-07-23 15:23:54,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-07-23 15:23:54,773 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 234 [2018-07-23 15:23:54,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:54,774 INFO L225 Difference]: With dead ends: 239 [2018-07-23 15:23:54,774 INFO L226 Difference]: Without dead ends: 237 [2018-07-23 15:23:54,775 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:23:54,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-07-23 15:23:54,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-07-23 15:23:54,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-07-23 15:23:54,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2018-07-23 15:23:54,778 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 234 [2018-07-23 15:23:54,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:54,778 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2018-07-23 15:23:54,778 INFO L472 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-07-23 15:23:54,778 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2018-07-23 15:23:54,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-07-23 15:23:54,779 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:54,779 INFO L353 BasicCegarLoop]: trace histogram [117, 116, 1, 1, 1] [2018-07-23 15:23:54,779 INFO L414 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:54,779 INFO L82 PathProgramCache]: Analyzing trace with hash -210395889, now seen corresponding path program 116 times [2018-07-23 15:23:54,779 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:55,161 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 15:23:55,162 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:55,162 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2018-07-23 15:23:55,162 INFO L450 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-07-23 15:23:55,163 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-07-23 15:23:55,164 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:23:55,164 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 119 states. [2018-07-23 15:23:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:55,448 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-07-23 15:23:55,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-07-23 15:23:55,449 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 236 [2018-07-23 15:23:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:55,449 INFO L225 Difference]: With dead ends: 241 [2018-07-23 15:23:55,449 INFO L226 Difference]: Without dead ends: 239 [2018-07-23 15:23:55,450 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 1 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 15:23:55,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-07-23 15:23:55,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-07-23 15:23:55,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-07-23 15:23:55,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-07-23 15:23:55,454 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 236 [2018-07-23 15:23:55,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:55,454 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-07-23 15:23:55,454 INFO L472 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-07-23 15:23:55,454 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-07-23 15:23:55,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-07-23 15:23:55,455 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:55,455 INFO L353 BasicCegarLoop]: trace histogram [118, 117, 1, 1, 1] [2018-07-23 15:23:55,455 INFO L414 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:55,455 INFO L82 PathProgramCache]: Analyzing trace with hash -326934327, now seen corresponding path program 117 times [2018-07-23 15:23:55,456 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:55,952 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 15:23:55,952 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:55,952 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119] total 119 [2018-07-23 15:23:55,953 INFO L450 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-07-23 15:23:55,955 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-07-23 15:23:55,956 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:23:55,956 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 120 states. [2018-07-23 15:23:56,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:56,154 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-07-23 15:23:56,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-07-23 15:23:56,155 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 238 [2018-07-23 15:23:56,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:56,156 INFO L225 Difference]: With dead ends: 243 [2018-07-23 15:23:56,156 INFO L226 Difference]: Without dead ends: 241 [2018-07-23 15:23:56,158 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:23:56,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-07-23 15:23:56,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-07-23 15:23:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-07-23 15:23:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2018-07-23 15:23:56,164 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 238 [2018-07-23 15:23:56,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:56,164 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2018-07-23 15:23:56,164 INFO L472 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-07-23 15:23:56,165 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2018-07-23 15:23:56,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-07-23 15:23:56,166 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:56,166 INFO L353 BasicCegarLoop]: trace histogram [119, 118, 1, 1, 1] [2018-07-23 15:23:56,166 INFO L414 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:56,167 INFO L82 PathProgramCache]: Analyzing trace with hash -651223549, now seen corresponding path program 118 times [2018-07-23 15:23:56,167 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:56,577 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 15:23:56,578 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:56,578 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2018-07-23 15:23:56,578 INFO L450 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-07-23 15:23:56,579 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-07-23 15:23:56,580 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:23:56,580 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 121 states. [2018-07-23 15:23:56,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:56,770 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-07-23 15:23:56,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-07-23 15:23:56,770 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 240 [2018-07-23 15:23:56,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:56,771 INFO L225 Difference]: With dead ends: 245 [2018-07-23 15:23:56,771 INFO L226 Difference]: Without dead ends: 243 [2018-07-23 15:23:56,773 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 1 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 15:23:56,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-07-23 15:23:56,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-07-23 15:23:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-07-23 15:23:56,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-07-23 15:23:56,776 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 240 [2018-07-23 15:23:56,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:56,776 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-07-23 15:23:56,776 INFO L472 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-07-23 15:23:56,776 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-07-23 15:23:56,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-07-23 15:23:56,777 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:56,777 INFO L353 BasicCegarLoop]: trace histogram [120, 119, 1, 1, 1] [2018-07-23 15:23:56,778 INFO L414 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:56,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1239446717, now seen corresponding path program 119 times [2018-07-23 15:23:56,778 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:57,154 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 15:23:57,155 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:57,155 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121] total 121 [2018-07-23 15:23:57,155 INFO L450 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-07-23 15:23:57,156 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-07-23 15:23:57,156 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:23:57,157 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 122 states. [2018-07-23 15:23:57,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:57,429 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-07-23 15:23:57,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-07-23 15:23:57,429 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 242 [2018-07-23 15:23:57,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:57,430 INFO L225 Difference]: With dead ends: 247 [2018-07-23 15:23:57,430 INFO L226 Difference]: Without dead ends: 245 [2018-07-23 15:23:57,431 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:23:57,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-07-23 15:23:57,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-07-23 15:23:57,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-07-23 15:23:57,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-07-23 15:23:57,434 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 242 [2018-07-23 15:23:57,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:57,435 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-07-23 15:23:57,435 INFO L472 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-07-23 15:23:57,435 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-07-23 15:23:57,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-07-23 15:23:57,436 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:57,436 INFO L353 BasicCegarLoop]: trace histogram [121, 120, 1, 1, 1] [2018-07-23 15:23:57,436 INFO L414 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:57,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1402406135, now seen corresponding path program 120 times [2018-07-23 15:23:57,436 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:57,857 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 15:23:57,857 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:57,858 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2018-07-23 15:23:57,858 INFO L450 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-07-23 15:23:57,859 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-07-23 15:23:57,859 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-07-23 15:23:57,859 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 123 states. [2018-07-23 15:23:58,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:58,150 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-07-23 15:23:58,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-07-23 15:23:58,150 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 244 [2018-07-23 15:23:58,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:58,151 INFO L225 Difference]: With dead ends: 249 [2018-07-23 15:23:58,151 INFO L226 Difference]: Without dead ends: 247 [2018-07-23 15:23:58,152 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 1 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 15:23:58,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-07-23 15:23:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-07-23 15:23:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-07-23 15:23:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-07-23 15:23:58,156 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 244 [2018-07-23 15:23:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:58,156 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-07-23 15:23:58,156 INFO L472 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-07-23 15:23:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-07-23 15:23:58,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-07-23 15:23:58,157 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:58,157 INFO L353 BasicCegarLoop]: trace histogram [122, 121, 1, 1, 1] [2018-07-23 15:23:58,157 INFO L414 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:58,158 INFO L82 PathProgramCache]: Analyzing trace with hash -907383119, now seen corresponding path program 121 times [2018-07-23 15:23:58,158 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:58,583 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 15:23:58,584 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:58,584 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123] total 123 [2018-07-23 15:23:58,584 INFO L450 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-07-23 15:23:58,585 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-07-23 15:23:58,586 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:23:58,586 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 124 states. [2018-07-23 15:23:58,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:58,867 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2018-07-23 15:23:58,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-07-23 15:23:58,868 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 246 [2018-07-23 15:23:58,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:58,869 INFO L225 Difference]: With dead ends: 251 [2018-07-23 15:23:58,869 INFO L226 Difference]: Without dead ends: 249 [2018-07-23 15:23:58,870 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 1 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 15:23:58,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-07-23 15:23:58,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2018-07-23 15:23:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-07-23 15:23:58,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2018-07-23 15:23:58,876 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 246 [2018-07-23 15:23:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:58,876 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2018-07-23 15:23:58,876 INFO L472 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-07-23 15:23:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2018-07-23 15:23:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-07-23 15:23:58,878 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:58,878 INFO L353 BasicCegarLoop]: trace histogram [123, 122, 1, 1, 1] [2018-07-23 15:23:58,878 INFO L414 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:58,878 INFO L82 PathProgramCache]: Analyzing trace with hash -116764181, now seen corresponding path program 122 times [2018-07-23 15:23:58,878 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:59,644 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 15:23:59,644 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:59,645 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2018-07-23 15:23:59,645 INFO L450 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-07-23 15:23:59,646 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-07-23 15:23:59,647 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:23:59,648 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand 125 states. [2018-07-23 15:24:00,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:00,087 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-07-23 15:24:00,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-07-23 15:24:00,087 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 248 [2018-07-23 15:24:00,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:00,088 INFO L225 Difference]: With dead ends: 253 [2018-07-23 15:24:00,088 INFO L226 Difference]: Without dead ends: 251 [2018-07-23 15:24:00,090 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:24:00,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-07-23 15:24:00,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-07-23 15:24:00,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-07-23 15:24:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-07-23 15:24:00,097 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 248 [2018-07-23 15:24:00,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:00,097 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-07-23 15:24:00,097 INFO L472 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-07-23 15:24:00,098 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-07-23 15:24:00,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-07-23 15:24:00,099 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:00,099 INFO L353 BasicCegarLoop]: trace histogram [124, 123, 1, 1, 1] [2018-07-23 15:24:00,099 INFO L414 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:00,099 INFO L82 PathProgramCache]: Analyzing trace with hash -541176155, now seen corresponding path program 123 times [2018-07-23 15:24:00,099 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:00,795 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 15:24:00,795 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:00,795 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125] total 125 [2018-07-23 15:24:00,796 INFO L450 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-07-23 15:24:00,797 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-07-23 15:24:00,798 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-07-23 15:24:00,798 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 126 states. [2018-07-23 15:24:01,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:01,066 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2018-07-23 15:24:01,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-07-23 15:24:01,066 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 250 [2018-07-23 15:24:01,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:01,067 INFO L225 Difference]: With dead ends: 255 [2018-07-23 15:24:01,067 INFO L226 Difference]: Without dead ends: 253 [2018-07-23 15:24:01,069 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 1 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 15:24:01,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-07-23 15:24:01,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-07-23 15:24:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-07-23 15:24:01,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2018-07-23 15:24:01,074 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 250 [2018-07-23 15:24:01,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:01,075 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2018-07-23 15:24:01,075 INFO L472 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-07-23 15:24:01,075 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2018-07-23 15:24:01,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-07-23 15:24:01,081 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:01,081 INFO L353 BasicCegarLoop]: trace histogram [125, 124, 1, 1, 1] [2018-07-23 15:24:01,081 INFO L414 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:01,081 INFO L82 PathProgramCache]: Analyzing trace with hash -379190049, now seen corresponding path program 124 times [2018-07-23 15:24:01,082 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:01,616 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 15:24:01,616 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:01,616 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126] total 126 [2018-07-23 15:24:01,617 INFO L450 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-07-23 15:24:01,618 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-07-23 15:24:01,618 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:24:01,618 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 127 states. [2018-07-23 15:24:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:01,923 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-07-23 15:24:01,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-07-23 15:24:01,924 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 252 [2018-07-23 15:24:01,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:01,924 INFO L225 Difference]: With dead ends: 257 [2018-07-23 15:24:01,924 INFO L226 Difference]: Without dead ends: 255 [2018-07-23 15:24:01,925 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:24:01,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-07-23 15:24:01,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-07-23 15:24:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-07-23 15:24:01,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-07-23 15:24:01,928 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 252 [2018-07-23 15:24:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:01,929 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-07-23 15:24:01,929 INFO L472 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-07-23 15:24:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-07-23 15:24:01,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-07-23 15:24:01,930 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:01,930 INFO L353 BasicCegarLoop]: trace histogram [126, 125, 1, 1, 1] [2018-07-23 15:24:01,930 INFO L414 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:01,930 INFO L82 PathProgramCache]: Analyzing trace with hash 670635161, now seen corresponding path program 125 times [2018-07-23 15:24:01,930 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:02,443 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 15:24:02,443 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:02,443 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127] total 127 [2018-07-23 15:24:02,443 INFO L450 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-07-23 15:24:02,445 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-07-23 15:24:02,446 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:24:02,446 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 128 states. [2018-07-23 15:24:02,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:02,634 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-07-23 15:24:02,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-07-23 15:24:02,634 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 254 [2018-07-23 15:24:02,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:02,635 INFO L225 Difference]: With dead ends: 259 [2018-07-23 15:24:02,635 INFO L226 Difference]: Without dead ends: 257 [2018-07-23 15:24:02,637 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:24:02,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-07-23 15:24:02,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2018-07-23 15:24:02,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-07-23 15:24:02,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2018-07-23 15:24:02,642 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 254 [2018-07-23 15:24:02,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:02,643 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2018-07-23 15:24:02,643 INFO L472 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-07-23 15:24:02,643 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2018-07-23 15:24:02,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-07-23 15:24:02,644 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:02,644 INFO L353 BasicCegarLoop]: trace histogram [127, 126, 1, 1, 1] [2018-07-23 15:24:02,644 INFO L414 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:02,645 INFO L82 PathProgramCache]: Analyzing trace with hash 235347411, now seen corresponding path program 126 times [2018-07-23 15:24:02,645 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:03,183 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 15:24:03,183 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:03,184 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128] total 128 [2018-07-23 15:24:03,184 INFO L450 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-07-23 15:24:03,186 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-07-23 15:24:03,187 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-07-23 15:24:03,188 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 129 states. [2018-07-23 15:24:03,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:03,540 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-07-23 15:24:03,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-07-23 15:24:03,541 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 256 [2018-07-23 15:24:03,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:03,541 INFO L225 Difference]: With dead ends: 261 [2018-07-23 15:24:03,541 INFO L226 Difference]: Without dead ends: 259 [2018-07-23 15:24:03,543 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 1 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 15:24:03,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-07-23 15:24:03,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-07-23 15:24:03,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-07-23 15:24:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2018-07-23 15:24:03,550 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 256 [2018-07-23 15:24:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:03,550 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2018-07-23 15:24:03,550 INFO L472 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-07-23 15:24:03,551 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2018-07-23 15:24:03,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-07-23 15:24:03,553 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:03,554 INFO L353 BasicCegarLoop]: trace histogram [128, 127, 1, 1, 1] [2018-07-23 15:24:03,554 INFO L414 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:03,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1464352627, now seen corresponding path program 127 times [2018-07-23 15:24:03,554 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:04,141 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 15:24:04,142 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:04,142 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129] total 129 [2018-07-23 15:24:04,142 INFO L450 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-07-23 15:24:04,144 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-07-23 15:24:04,145 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:24:04,145 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 130 states. [2018-07-23 15:24:04,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:04,288 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2018-07-23 15:24:04,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-07-23 15:24:04,288 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 258 [2018-07-23 15:24:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:04,289 INFO L225 Difference]: With dead ends: 263 [2018-07-23 15:24:04,289 INFO L226 Difference]: Without dead ends: 261 [2018-07-23 15:24:04,291 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:24:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-07-23 15:24:04,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-07-23 15:24:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-07-23 15:24:04,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2018-07-23 15:24:04,295 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 258 [2018-07-23 15:24:04,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:04,296 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2018-07-23 15:24:04,296 INFO L472 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-07-23 15:24:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2018-07-23 15:24:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-07-23 15:24:04,297 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:04,297 INFO L353 BasicCegarLoop]: trace histogram [129, 128, 1, 1, 1] [2018-07-23 15:24:04,297 INFO L414 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1506450631, now seen corresponding path program 128 times [2018-07-23 15:24:04,297 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:04,776 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 15:24:04,776 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:04,777 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130] total 130 [2018-07-23 15:24:04,777 INFO L450 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-07-23 15:24:04,779 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-07-23 15:24:04,780 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-07-23 15:24:04,780 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand 131 states. [2018-07-23 15:24:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:05,124 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-07-23 15:24:05,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-07-23 15:24:05,124 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 260 [2018-07-23 15:24:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:05,125 INFO L225 Difference]: With dead ends: 265 [2018-07-23 15:24:05,125 INFO L226 Difference]: Without dead ends: 263 [2018-07-23 15:24:05,127 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 1 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 15:24:05,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-07-23 15:24:05,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-07-23 15:24:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-07-23 15:24:05,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-07-23 15:24:05,130 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 260 [2018-07-23 15:24:05,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:05,131 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-07-23 15:24:05,131 INFO L472 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-07-23 15:24:05,131 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-07-23 15:24:05,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-07-23 15:24:05,132 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:05,132 INFO L353 BasicCegarLoop]: trace histogram [130, 129, 1, 1, 1] [2018-07-23 15:24:05,132 INFO L414 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:05,132 INFO L82 PathProgramCache]: Analyzing trace with hash 295129729, now seen corresponding path program 129 times [2018-07-23 15:24:05,132 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:05,636 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 15:24:05,637 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:05,637 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131] total 131 [2018-07-23 15:24:05,637 INFO L450 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-07-23 15:24:05,639 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-07-23 15:24:05,640 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-07-23 15:24:05,640 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 132 states. [2018-07-23 15:24:05,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:05,969 INFO L93 Difference]: Finished difference Result 267 states and 267 transitions. [2018-07-23 15:24:05,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-07-23 15:24:05,970 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 262 [2018-07-23 15:24:05,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:05,971 INFO L225 Difference]: With dead ends: 267 [2018-07-23 15:24:05,971 INFO L226 Difference]: Without dead ends: 265 [2018-07-23 15:24:05,972 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 1 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 15:24:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-07-23 15:24:05,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2018-07-23 15:24:05,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-07-23 15:24:05,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2018-07-23 15:24:05,977 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 262 [2018-07-23 15:24:05,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:05,978 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2018-07-23 15:24:05,978 INFO L472 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-07-23 15:24:05,978 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2018-07-23 15:24:05,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-07-23 15:24:05,979 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:05,979 INFO L353 BasicCegarLoop]: trace histogram [131, 130, 1, 1, 1] [2018-07-23 15:24:05,979 INFO L414 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:05,979 INFO L82 PathProgramCache]: Analyzing trace with hash 151880123, now seen corresponding path program 130 times [2018-07-23 15:24:05,980 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:06,465 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 15:24:06,465 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:06,465 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132] total 132 [2018-07-23 15:24:06,466 INFO L450 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-07-23 15:24:06,467 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-07-23 15:24:06,467 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-07-23 15:24:06,468 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand 133 states. [2018-07-23 15:24:06,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:06,640 INFO L93 Difference]: Finished difference Result 269 states and 269 transitions. [2018-07-23 15:24:06,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-07-23 15:24:06,640 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 264 [2018-07-23 15:24:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:06,641 INFO L225 Difference]: With dead ends: 269 [2018-07-23 15:24:06,641 INFO L226 Difference]: Without dead ends: 267 [2018-07-23 15:24:06,642 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 1 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 15:24:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-07-23 15:24:06,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-07-23 15:24:06,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-07-23 15:24:06,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2018-07-23 15:24:06,646 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 264 [2018-07-23 15:24:06,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:06,646 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2018-07-23 15:24:06,646 INFO L472 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-07-23 15:24:06,646 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2018-07-23 15:24:06,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-07-23 15:24:06,647 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:06,647 INFO L353 BasicCegarLoop]: trace histogram [132, 131, 1, 1, 1] [2018-07-23 15:24:06,647 INFO L414 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:06,647 INFO L82 PathProgramCache]: Analyzing trace with hash -72037771, now seen corresponding path program 131 times [2018-07-23 15:24:06,647 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:07,126 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 15:24:07,126 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:07,126 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133] total 133 [2018-07-23 15:24:07,126 INFO L450 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-07-23 15:24:07,128 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-07-23 15:24:07,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-07-23 15:24:07,129 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 134 states. [2018-07-23 15:24:07,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:07,459 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2018-07-23 15:24:07,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-07-23 15:24:07,459 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 266 [2018-07-23 15:24:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:07,460 INFO L225 Difference]: With dead ends: 271 [2018-07-23 15:24:07,460 INFO L226 Difference]: Without dead ends: 269 [2018-07-23 15:24:07,461 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 1 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 15:24:07,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-07-23 15:24:07,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2018-07-23 15:24:07,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-07-23 15:24:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2018-07-23 15:24:07,466 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 266 [2018-07-23 15:24:07,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:07,466 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2018-07-23 15:24:07,466 INFO L472 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-07-23 15:24:07,466 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2018-07-23 15:24:07,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-07-23 15:24:07,467 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:07,467 INFO L353 BasicCegarLoop]: trace histogram [133, 132, 1, 1, 1] [2018-07-23 15:24:07,467 INFO L414 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:07,468 INFO L82 PathProgramCache]: Analyzing trace with hash -508769105, now seen corresponding path program 132 times [2018-07-23 15:24:07,468 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:07,923 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 15:24:07,923 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:07,923 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134] total 134 [2018-07-23 15:24:07,924 INFO L450 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-07-23 15:24:07,925 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-07-23 15:24:07,926 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-07-23 15:24:07,927 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand 135 states. [2018-07-23 15:24:08,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:08,346 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-07-23 15:24:08,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-07-23 15:24:08,346 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 268 [2018-07-23 15:24:08,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:08,347 INFO L225 Difference]: With dead ends: 273 [2018-07-23 15:24:08,347 INFO L226 Difference]: Without dead ends: 271 [2018-07-23 15:24:08,348 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 1 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 15:24:08,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-07-23 15:24:08,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-07-23 15:24:08,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-07-23 15:24:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2018-07-23 15:24:08,352 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 268 [2018-07-23 15:24:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:08,353 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2018-07-23 15:24:08,353 INFO L472 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-07-23 15:24:08,353 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2018-07-23 15:24:08,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-07-23 15:24:08,354 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:08,354 INFO L353 BasicCegarLoop]: trace histogram [134, 133, 1, 1, 1] [2018-07-23 15:24:08,354 INFO L414 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:08,354 INFO L82 PathProgramCache]: Analyzing trace with hash 699213929, now seen corresponding path program 133 times [2018-07-23 15:24:08,354 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:08,810 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 15:24:08,810 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:08,811 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135] total 135 [2018-07-23 15:24:08,811 INFO L450 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-07-23 15:24:08,812 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-07-23 15:24:08,813 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:24:08,813 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 136 states. [2018-07-23 15:24:09,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:09,054 INFO L93 Difference]: Finished difference Result 275 states and 275 transitions. [2018-07-23 15:24:09,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-07-23 15:24:09,055 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 270 [2018-07-23 15:24:09,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:09,056 INFO L225 Difference]: With dead ends: 275 [2018-07-23 15:24:09,056 INFO L226 Difference]: Without dead ends: 273 [2018-07-23 15:24:09,057 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:24:09,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-07-23 15:24:09,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2018-07-23 15:24:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-07-23 15:24:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2018-07-23 15:24:09,062 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 270 [2018-07-23 15:24:09,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:09,062 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2018-07-23 15:24:09,062 INFO L472 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-07-23 15:24:09,062 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2018-07-23 15:24:09,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-07-23 15:24:09,063 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:09,063 INFO L353 BasicCegarLoop]: trace histogram [135, 134, 1, 1, 1] [2018-07-23 15:24:09,063 INFO L414 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:09,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1929739683, now seen corresponding path program 134 times [2018-07-23 15:24:09,064 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:09,523 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 15:24:09,523 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:09,523 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136] total 136 [2018-07-23 15:24:09,524 INFO L450 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-07-23 15:24:09,525 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-07-23 15:24:09,527 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-07-23 15:24:09,527 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand 137 states. [2018-07-23 15:24:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:09,675 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-07-23 15:24:09,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-07-23 15:24:09,675 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 272 [2018-07-23 15:24:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:09,676 INFO L225 Difference]: With dead ends: 277 [2018-07-23 15:24:09,676 INFO L226 Difference]: Without dead ends: 275 [2018-07-23 15:24:09,678 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 1 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 15:24:09,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-07-23 15:24:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-07-23 15:24:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-07-23 15:24:09,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-07-23 15:24:09,682 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 272 [2018-07-23 15:24:09,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:09,683 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-07-23 15:24:09,683 INFO L472 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-07-23 15:24:09,683 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-07-23 15:24:09,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-07-23 15:24:09,684 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:09,684 INFO L353 BasicCegarLoop]: trace histogram [136, 135, 1, 1, 1] [2018-07-23 15:24:09,684 INFO L414 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:09,685 INFO L82 PathProgramCache]: Analyzing trace with hash -945984419, now seen corresponding path program 135 times [2018-07-23 15:24:09,685 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:10,430 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 15:24:10,431 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:10,431 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137] total 137 [2018-07-23 15:24:10,431 INFO L450 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-07-23 15:24:10,432 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-07-23 15:24:10,432 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:24:10,432 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 138 states. [2018-07-23 15:24:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:10,802 INFO L93 Difference]: Finished difference Result 279 states and 279 transitions. [2018-07-23 15:24:10,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-07-23 15:24:10,802 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 274 [2018-07-23 15:24:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:10,803 INFO L225 Difference]: With dead ends: 279 [2018-07-23 15:24:10,803 INFO L226 Difference]: Without dead ends: 277 [2018-07-23 15:24:10,804 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:24:10,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-07-23 15:24:10,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2018-07-23 15:24:10,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-07-23 15:24:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2018-07-23 15:24:10,808 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 274 [2018-07-23 15:24:10,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:10,809 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2018-07-23 15:24:10,809 INFO L472 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-07-23 15:24:10,809 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2018-07-23 15:24:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-07-23 15:24:10,809 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:10,810 INFO L353 BasicCegarLoop]: trace histogram [137, 136, 1, 1, 1] [2018-07-23 15:24:10,810 INFO L414 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:10,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1442092183, now seen corresponding path program 136 times [2018-07-23 15:24:10,810 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:11,259 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 15:24:11,259 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:11,259 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138] total 138 [2018-07-23 15:24:11,260 INFO L450 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-07-23 15:24:11,261 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-07-23 15:24:11,261 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 15:24:11,262 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 139 states. [2018-07-23 15:24:11,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:11,659 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2018-07-23 15:24:11,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-07-23 15:24:11,660 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 276 [2018-07-23 15:24:11,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:11,660 INFO L225 Difference]: With dead ends: 281 [2018-07-23 15:24:11,660 INFO L226 Difference]: Without dead ends: 279 [2018-07-23 15:24:11,661 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 15:24:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-07-23 15:24:11,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-07-23 15:24:11,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-07-23 15:24:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2018-07-23 15:24:11,666 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 276 [2018-07-23 15:24:11,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:11,666 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2018-07-23 15:24:11,666 INFO L472 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-07-23 15:24:11,666 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2018-07-23 15:24:11,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-07-23 15:24:11,667 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:11,667 INFO L353 BasicCegarLoop]: trace histogram [138, 137, 1, 1, 1] [2018-07-23 15:24:11,667 INFO L414 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:11,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1423796655, now seen corresponding path program 137 times [2018-07-23 15:24:11,668 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:12,138 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 15:24:12,139 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:12,139 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139] total 139 [2018-07-23 15:24:12,139 INFO L450 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-07-23 15:24:12,141 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-07-23 15:24:12,141 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:24:12,141 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand 140 states. [2018-07-23 15:24:12,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:12,538 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2018-07-23 15:24:12,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-07-23 15:24:12,538 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 278 [2018-07-23 15:24:12,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:12,538 INFO L225 Difference]: With dead ends: 283 [2018-07-23 15:24:12,538 INFO L226 Difference]: Without dead ends: 281 [2018-07-23 15:24:12,540 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 1 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 15:24:12,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-07-23 15:24:12,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2018-07-23 15:24:12,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-07-23 15:24:12,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2018-07-23 15:24:12,544 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 278 [2018-07-23 15:24:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:12,545 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2018-07-23 15:24:12,545 INFO L472 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-07-23 15:24:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2018-07-23 15:24:12,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-07-23 15:24:12,546 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:12,546 INFO L353 BasicCegarLoop]: trace histogram [139, 138, 1, 1, 1] [2018-07-23 15:24:12,546 INFO L414 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:12,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1826034059, now seen corresponding path program 138 times [2018-07-23 15:24:12,547 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:13,169 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 15:24:13,170 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:13,170 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140] total 140 [2018-07-23 15:24:13,170 INFO L450 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-07-23 15:24:13,172 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-07-23 15:24:13,173 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-07-23 15:24:13,173 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand 141 states. [2018-07-23 15:24:13,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:13,569 INFO L93 Difference]: Finished difference Result 285 states and 285 transitions. [2018-07-23 15:24:13,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-07-23 15:24:13,569 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 280 [2018-07-23 15:24:13,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:13,569 INFO L225 Difference]: With dead ends: 285 [2018-07-23 15:24:13,570 INFO L226 Difference]: Without dead ends: 283 [2018-07-23 15:24:13,571 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-07-23 15:24:13,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-07-23 15:24:13,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-07-23 15:24:13,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-07-23 15:24:13,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2018-07-23 15:24:13,574 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 280 [2018-07-23 15:24:13,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:13,574 INFO L471 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2018-07-23 15:24:13,574 INFO L472 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-07-23 15:24:13,574 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2018-07-23 15:24:13,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-07-23 15:24:13,575 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:13,575 INFO L353 BasicCegarLoop]: trace histogram [140, 139, 1, 1, 1] [2018-07-23 15:24:13,575 INFO L414 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:13,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1822841275, now seen corresponding path program 139 times [2018-07-23 15:24:13,575 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:14,139 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 15:24:14,140 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:14,140 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141] total 141 [2018-07-23 15:24:14,140 INFO L450 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-07-23 15:24:14,141 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-07-23 15:24:14,142 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:24:14,142 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 142 states. [2018-07-23 15:24:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:14,563 INFO L93 Difference]: Finished difference Result 287 states and 287 transitions. [2018-07-23 15:24:14,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-07-23 15:24:14,563 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 282 [2018-07-23 15:24:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:14,563 INFO L225 Difference]: With dead ends: 287 [2018-07-23 15:24:14,563 INFO L226 Difference]: Without dead ends: 285 [2018-07-23 15:24:14,564 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:24:14,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-07-23 15:24:14,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2018-07-23 15:24:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-07-23 15:24:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 285 transitions. [2018-07-23 15:24:14,567 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 285 transitions. Word has length 282 [2018-07-23 15:24:14,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:14,567 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 285 transitions. [2018-07-23 15:24:14,567 INFO L472 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-07-23 15:24:14,567 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 285 transitions. [2018-07-23 15:24:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-07-23 15:24:14,568 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:14,568 INFO L353 BasicCegarLoop]: trace histogram [141, 140, 1, 1, 1] [2018-07-23 15:24:14,568 INFO L414 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:14,568 INFO L82 PathProgramCache]: Analyzing trace with hash 596243583, now seen corresponding path program 140 times [2018-07-23 15:24:14,568 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:15,050 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 15:24:15,050 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:15,051 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142] total 142 [2018-07-23 15:24:15,051 INFO L450 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-07-23 15:24:15,052 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-07-23 15:24:15,053 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-07-23 15:24:15,053 INFO L87 Difference]: Start difference. First operand 285 states and 285 transitions. Second operand 143 states. [2018-07-23 15:24:15,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:15,478 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-07-23 15:24:15,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-07-23 15:24:15,478 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 284 [2018-07-23 15:24:15,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:15,479 INFO L225 Difference]: With dead ends: 289 [2018-07-23 15:24:15,479 INFO L226 Difference]: Without dead ends: 287 [2018-07-23 15:24:15,481 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 1 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 15:24:15,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-07-23 15:24:15,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-07-23 15:24:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-07-23 15:24:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-07-23 15:24:15,485 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 284 [2018-07-23 15:24:15,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:15,485 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-07-23 15:24:15,485 INFO L472 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-07-23 15:24:15,486 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-07-23 15:24:15,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-07-23 15:24:15,487 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:15,487 INFO L353 BasicCegarLoop]: trace histogram [142, 141, 1, 1, 1] [2018-07-23 15:24:15,487 INFO L414 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:15,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1759484985, now seen corresponding path program 141 times [2018-07-23 15:24:15,487 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:16,070 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 15:24:16,071 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:16,071 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143] total 143 [2018-07-23 15:24:16,071 INFO L450 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-07-23 15:24:16,072 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-07-23 15:24:16,073 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-07-23 15:24:16,073 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 144 states. [2018-07-23 15:24:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:16,512 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2018-07-23 15:24:16,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-07-23 15:24:16,512 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 286 [2018-07-23 15:24:16,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:16,512 INFO L225 Difference]: With dead ends: 291 [2018-07-23 15:24:16,512 INFO L226 Difference]: Without dead ends: 289 [2018-07-23 15:24:16,514 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 1 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 15:24:16,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-07-23 15:24:16,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2018-07-23 15:24:16,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-07-23 15:24:16,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 289 transitions. [2018-07-23 15:24:16,517 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 289 transitions. Word has length 286 [2018-07-23 15:24:16,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:16,517 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 289 transitions. [2018-07-23 15:24:16,517 INFO L472 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-07-23 15:24:16,517 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 289 transitions. [2018-07-23 15:24:16,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-07-23 15:24:16,518 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:16,518 INFO L353 BasicCegarLoop]: trace histogram [143, 142, 1, 1, 1] [2018-07-23 15:24:16,519 INFO L414 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:16,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1351991949, now seen corresponding path program 142 times [2018-07-23 15:24:16,519 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:17,323 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 15:24:17,324 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:17,324 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144] total 144 [2018-07-23 15:24:17,324 INFO L450 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-07-23 15:24:17,326 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-07-23 15:24:17,328 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 15:24:17,328 INFO L87 Difference]: Start difference. First operand 289 states and 289 transitions. Second operand 145 states. [2018-07-23 15:24:17,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:17,929 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2018-07-23 15:24:17,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-07-23 15:24:17,929 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 288 [2018-07-23 15:24:17,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:17,930 INFO L225 Difference]: With dead ends: 293 [2018-07-23 15:24:17,930 INFO L226 Difference]: Without dead ends: 291 [2018-07-23 15:24:17,931 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 15:24:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-07-23 15:24:17,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-07-23 15:24:17,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-07-23 15:24:17,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2018-07-23 15:24:17,934 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 288 [2018-07-23 15:24:17,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:17,935 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2018-07-23 15:24:17,935 INFO L472 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-07-23 15:24:17,935 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2018-07-23 15:24:17,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-07-23 15:24:17,936 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:17,936 INFO L353 BasicCegarLoop]: trace histogram [144, 143, 1, 1, 1] [2018-07-23 15:24:17,936 INFO L414 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:17,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2110879789, now seen corresponding path program 143 times [2018-07-23 15:24:17,937 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:18,624 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 15:24:18,624 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:18,624 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145] total 145 [2018-07-23 15:24:18,625 INFO L450 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-07-23 15:24:18,626 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-07-23 15:24:18,627 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:24:18,628 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand 146 states. [2018-07-23 15:24:18,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:18,945 INFO L93 Difference]: Finished difference Result 295 states and 295 transitions. [2018-07-23 15:24:18,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-07-23 15:24:18,946 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 290 [2018-07-23 15:24:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:18,946 INFO L225 Difference]: With dead ends: 295 [2018-07-23 15:24:18,946 INFO L226 Difference]: Without dead ends: 293 [2018-07-23 15:24:18,947 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:24:18,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-07-23 15:24:18,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2018-07-23 15:24:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-07-23 15:24:18,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2018-07-23 15:24:18,950 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 290 [2018-07-23 15:24:18,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:18,950 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2018-07-23 15:24:18,950 INFO L472 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-07-23 15:24:18,950 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2018-07-23 15:24:18,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-07-23 15:24:18,951 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:18,951 INFO L353 BasicCegarLoop]: trace histogram [145, 144, 1, 1, 1] [2018-07-23 15:24:18,951 INFO L414 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:18,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1330965607, now seen corresponding path program 144 times [2018-07-23 15:24:18,951 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:19,477 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 15:24:19,477 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:19,478 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146] total 146 [2018-07-23 15:24:19,478 INFO L450 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-07-23 15:24:19,479 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-07-23 15:24:19,480 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-07-23 15:24:19,480 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 147 states. [2018-07-23 15:24:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:19,660 INFO L93 Difference]: Finished difference Result 297 states and 297 transitions. [2018-07-23 15:24:19,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-07-23 15:24:19,660 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 292 [2018-07-23 15:24:19,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:19,661 INFO L225 Difference]: With dead ends: 297 [2018-07-23 15:24:19,661 INFO L226 Difference]: Without dead ends: 295 [2018-07-23 15:24:19,663 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-07-23 15:24:19,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-07-23 15:24:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-07-23 15:24:19,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-07-23 15:24:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2018-07-23 15:24:19,666 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 292 [2018-07-23 15:24:19,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:19,667 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2018-07-23 15:24:19,667 INFO L472 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-07-23 15:24:19,667 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2018-07-23 15:24:19,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-07-23 15:24:19,668 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:19,668 INFO L353 BasicCegarLoop]: trace histogram [146, 145, 1, 1, 1] [2018-07-23 15:24:19,668 INFO L414 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:19,668 INFO L82 PathProgramCache]: Analyzing trace with hash -842253791, now seen corresponding path program 145 times [2018-07-23 15:24:19,668 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:20,216 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 15:24:20,216 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:20,216 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147] total 147 [2018-07-23 15:24:20,216 INFO L450 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-07-23 15:24:20,218 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-07-23 15:24:20,219 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:24:20,219 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand 148 states. [2018-07-23 15:24:20,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:20,727 INFO L93 Difference]: Finished difference Result 299 states and 299 transitions. [2018-07-23 15:24:20,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-07-23 15:24:20,728 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 294 [2018-07-23 15:24:20,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:20,728 INFO L225 Difference]: With dead ends: 299 [2018-07-23 15:24:20,728 INFO L226 Difference]: Without dead ends: 297 [2018-07-23 15:24:20,730 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:24:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-07-23 15:24:20,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2018-07-23 15:24:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-07-23 15:24:20,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2018-07-23 15:24:20,733 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 294 [2018-07-23 15:24:20,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:20,733 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2018-07-23 15:24:20,733 INFO L472 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-07-23 15:24:20,733 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2018-07-23 15:24:20,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-07-23 15:24:20,734 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:20,734 INFO L353 BasicCegarLoop]: trace histogram [147, 146, 1, 1, 1] [2018-07-23 15:24:20,734 INFO L414 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:20,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1951989413, now seen corresponding path program 146 times [2018-07-23 15:24:20,734 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:21,321 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 15:24:21,321 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:21,321 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148] total 148 [2018-07-23 15:24:21,321 INFO L450 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-07-23 15:24:21,323 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-07-23 15:24:21,324 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-07-23 15:24:21,324 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand 149 states. [2018-07-23 15:24:21,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:21,923 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-07-23 15:24:21,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-07-23 15:24:21,924 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 296 [2018-07-23 15:24:21,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:21,925 INFO L225 Difference]: With dead ends: 301 [2018-07-23 15:24:21,925 INFO L226 Difference]: Without dead ends: 299 [2018-07-23 15:24:21,927 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 1 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 15:24:21,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-07-23 15:24:21,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-07-23 15:24:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-07-23 15:24:21,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2018-07-23 15:24:21,932 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 296 [2018-07-23 15:24:21,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:21,932 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2018-07-23 15:24:21,932 INFO L472 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-07-23 15:24:21,932 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2018-07-23 15:24:21,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-07-23 15:24:21,934 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:21,934 INFO L353 BasicCegarLoop]: trace histogram [148, 147, 1, 1, 1] [2018-07-23 15:24:21,934 INFO L414 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:21,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1038934549, now seen corresponding path program 147 times [2018-07-23 15:24:21,934 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:22,738 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 15:24:22,739 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:22,739 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149] total 149 [2018-07-23 15:24:22,739 INFO L450 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-07-23 15:24:22,740 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-07-23 15:24:22,740 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-07-23 15:24:22,740 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 150 states. [2018-07-23 15:24:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:23,299 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2018-07-23 15:24:23,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-07-23 15:24:23,299 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 298 [2018-07-23 15:24:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:23,299 INFO L225 Difference]: With dead ends: 303 [2018-07-23 15:24:23,299 INFO L226 Difference]: Without dead ends: 301 [2018-07-23 15:24:23,300 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-07-23 15:24:23,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-07-23 15:24:23,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2018-07-23 15:24:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-07-23 15:24:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 301 transitions. [2018-07-23 15:24:23,303 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 301 transitions. Word has length 298 [2018-07-23 15:24:23,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:23,303 INFO L471 AbstractCegarLoop]: Abstraction has 301 states and 301 transitions. [2018-07-23 15:24:23,303 INFO L472 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-07-23 15:24:23,303 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 301 transitions. [2018-07-23 15:24:23,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-07-23 15:24:23,304 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:23,304 INFO L353 BasicCegarLoop]: trace histogram [149, 148, 1, 1, 1] [2018-07-23 15:24:23,304 INFO L414 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:23,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1983741007, now seen corresponding path program 148 times [2018-07-23 15:24:23,305 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:23,948 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 15:24:23,948 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:23,948 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150] total 150 [2018-07-23 15:24:23,949 INFO L450 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-07-23 15:24:23,951 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-07-23 15:24:23,952 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-07-23 15:24:23,952 INFO L87 Difference]: Start difference. First operand 301 states and 301 transitions. Second operand 151 states. [2018-07-23 15:24:24,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:24,195 INFO L93 Difference]: Finished difference Result 305 states and 305 transitions. [2018-07-23 15:24:24,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-07-23 15:24:24,195 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 300 [2018-07-23 15:24:24,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:24,196 INFO L225 Difference]: With dead ends: 305 [2018-07-23 15:24:24,196 INFO L226 Difference]: Without dead ends: 303 [2018-07-23 15:24:24,198 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 1 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 15:24:24,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-07-23 15:24:24,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-07-23 15:24:24,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-07-23 15:24:24,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2018-07-23 15:24:24,201 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 300 [2018-07-23 15:24:24,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:24,202 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2018-07-23 15:24:24,202 INFO L472 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-07-23 15:24:24,202 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2018-07-23 15:24:24,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-07-23 15:24:24,203 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:24,203 INFO L353 BasicCegarLoop]: trace histogram [150, 149, 1, 1, 1] [2018-07-23 15:24:24,203 INFO L414 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:24,203 INFO L82 PathProgramCache]: Analyzing trace with hash -590319607, now seen corresponding path program 149 times [2018-07-23 15:24:24,203 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:24,921 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 15:24:24,922 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:24,922 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151] total 151 [2018-07-23 15:24:24,922 INFO L450 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-07-23 15:24:24,924 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-07-23 15:24:24,925 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:24:24,925 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand 152 states. [2018-07-23 15:24:25,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:25,685 INFO L93 Difference]: Finished difference Result 307 states and 307 transitions. [2018-07-23 15:24:25,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-07-23 15:24:25,685 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 302 [2018-07-23 15:24:25,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:25,686 INFO L225 Difference]: With dead ends: 307 [2018-07-23 15:24:25,686 INFO L226 Difference]: Without dead ends: 305 [2018-07-23 15:24:25,689 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:24:25,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-07-23 15:24:25,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2018-07-23 15:24:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-07-23 15:24:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 305 transitions. [2018-07-23 15:24:25,693 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 305 transitions. Word has length 302 [2018-07-23 15:24:25,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:25,694 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 305 transitions. [2018-07-23 15:24:25,694 INFO L472 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-07-23 15:24:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 305 transitions. [2018-07-23 15:24:25,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-07-23 15:24:25,695 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:25,695 INFO L353 BasicCegarLoop]: trace histogram [151, 150, 1, 1, 1] [2018-07-23 15:24:25,695 INFO L414 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:25,695 INFO L82 PathProgramCache]: Analyzing trace with hash -361407165, now seen corresponding path program 150 times [2018-07-23 15:24:25,696 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:26,313 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 15:24:26,314 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:26,314 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152] total 152 [2018-07-23 15:24:26,314 INFO L450 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-07-23 15:24:26,316 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-07-23 15:24:26,316 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-07-23 15:24:26,317 INFO L87 Difference]: Start difference. First operand 305 states and 305 transitions. Second operand 153 states. [2018-07-23 15:24:26,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:26,909 INFO L93 Difference]: Finished difference Result 309 states and 309 transitions. [2018-07-23 15:24:26,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-07-23 15:24:26,910 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 304 [2018-07-23 15:24:26,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:26,910 INFO L225 Difference]: With dead ends: 309 [2018-07-23 15:24:26,910 INFO L226 Difference]: Without dead ends: 307 [2018-07-23 15:24:26,912 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-07-23 15:24:26,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-07-23 15:24:26,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-07-23 15:24:26,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-07-23 15:24:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2018-07-23 15:24:26,915 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 304 [2018-07-23 15:24:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:26,915 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2018-07-23 15:24:26,915 INFO L472 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-07-23 15:24:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2018-07-23 15:24:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-07-23 15:24:26,916 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:26,916 INFO L353 BasicCegarLoop]: trace histogram [152, 151, 1, 1, 1] [2018-07-23 15:24:26,916 INFO L414 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:26,916 INFO L82 PathProgramCache]: Analyzing trace with hash 580117501, now seen corresponding path program 151 times [2018-07-23 15:24:26,916 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:27,574 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 15:24:27,575 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:27,575 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153] total 153 [2018-07-23 15:24:27,575 INFO L450 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-07-23 15:24:27,577 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-07-23 15:24:27,577 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-07-23 15:24:27,578 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 154 states. [2018-07-23 15:24:27,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:27,987 INFO L93 Difference]: Finished difference Result 311 states and 311 transitions. [2018-07-23 15:24:27,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-07-23 15:24:27,987 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 306 [2018-07-23 15:24:27,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:27,989 INFO L225 Difference]: With dead ends: 311 [2018-07-23 15:24:27,989 INFO L226 Difference]: Without dead ends: 309 [2018-07-23 15:24:27,990 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 1 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 15:24:27,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-07-23 15:24:27,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2018-07-23 15:24:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-07-23 15:24:27,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 309 transitions. [2018-07-23 15:24:27,995 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 309 transitions. Word has length 306 [2018-07-23 15:24:27,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:27,995 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 309 transitions. [2018-07-23 15:24:27,995 INFO L472 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-07-23 15:24:27,995 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 309 transitions. [2018-07-23 15:24:27,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-07-23 15:24:27,997 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:27,997 INFO L353 BasicCegarLoop]: trace histogram [153, 152, 1, 1, 1] [2018-07-23 15:24:27,997 INFO L414 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:27,997 INFO L82 PathProgramCache]: Analyzing trace with hash -852777929, now seen corresponding path program 152 times [2018-07-23 15:24:27,997 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:28,820 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 15:24:28,821 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:28,821 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154] total 154 [2018-07-23 15:24:28,821 INFO L450 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-07-23 15:24:28,823 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-07-23 15:24:28,824 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:24:28,824 INFO L87 Difference]: Start difference. First operand 309 states and 309 transitions. Second operand 155 states. [2018-07-23 15:24:29,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:29,460 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-07-23 15:24:29,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-07-23 15:24:29,460 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 308 [2018-07-23 15:24:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:29,461 INFO L225 Difference]: With dead ends: 313 [2018-07-23 15:24:29,461 INFO L226 Difference]: Without dead ends: 311 [2018-07-23 15:24:29,462 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:24:29,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-07-23 15:24:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-07-23 15:24:29,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-07-23 15:24:29,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2018-07-23 15:24:29,465 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 308 [2018-07-23 15:24:29,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:29,466 INFO L471 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2018-07-23 15:24:29,466 INFO L472 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-07-23 15:24:29,466 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2018-07-23 15:24:29,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-07-23 15:24:29,466 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:29,467 INFO L353 BasicCegarLoop]: trace histogram [154, 153, 1, 1, 1] [2018-07-23 15:24:29,467 INFO L414 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:29,467 INFO L82 PathProgramCache]: Analyzing trace with hash 819215857, now seen corresponding path program 153 times [2018-07-23 15:24:29,467 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:30,081 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 15:24:30,081 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:30,081 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155] total 155 [2018-07-23 15:24:30,082 INFO L450 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-07-23 15:24:30,083 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-07-23 15:24:30,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-07-23 15:24:30,084 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand 156 states. [2018-07-23 15:24:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:30,402 INFO L93 Difference]: Finished difference Result 315 states and 315 transitions. [2018-07-23 15:24:30,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-07-23 15:24:30,402 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 310 [2018-07-23 15:24:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:30,403 INFO L225 Difference]: With dead ends: 315 [2018-07-23 15:24:30,403 INFO L226 Difference]: Without dead ends: 313 [2018-07-23 15:24:30,404 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-07-23 15:24:30,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-07-23 15:24:30,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2018-07-23 15:24:30,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-07-23 15:24:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 313 transitions. [2018-07-23 15:24:30,407 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 313 transitions. Word has length 310 [2018-07-23 15:24:30,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:30,408 INFO L471 AbstractCegarLoop]: Abstraction has 313 states and 313 transitions. [2018-07-23 15:24:30,408 INFO L472 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-07-23 15:24:30,408 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 313 transitions. [2018-07-23 15:24:30,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-07-23 15:24:30,408 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:30,409 INFO L353 BasicCegarLoop]: trace histogram [155, 154, 1, 1, 1] [2018-07-23 15:24:30,409 INFO L414 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:30,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1287475499, now seen corresponding path program 154 times [2018-07-23 15:24:30,409 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:31,022 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 15:24:31,023 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:31,023 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156] total 156 [2018-07-23 15:24:31,023 INFO L450 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-07-23 15:24:31,025 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-07-23 15:24:31,026 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-07-23 15:24:31,026 INFO L87 Difference]: Start difference. First operand 313 states and 313 transitions. Second operand 157 states. [2018-07-23 15:24:31,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:31,696 INFO L93 Difference]: Finished difference Result 317 states and 317 transitions. [2018-07-23 15:24:31,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-07-23 15:24:31,696 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 312 [2018-07-23 15:24:31,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:31,697 INFO L225 Difference]: With dead ends: 317 [2018-07-23 15:24:31,697 INFO L226 Difference]: Without dead ends: 315 [2018-07-23 15:24:31,698 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 1 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 15:24:31,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-07-23 15:24:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-07-23 15:24:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-07-23 15:24:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 315 transitions. [2018-07-23 15:24:31,703 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 315 transitions. Word has length 312 [2018-07-23 15:24:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:31,703 INFO L471 AbstractCegarLoop]: Abstraction has 315 states and 315 transitions. [2018-07-23 15:24:31,703 INFO L472 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-07-23 15:24:31,703 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 315 transitions. [2018-07-23 15:24:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-07-23 15:24:31,705 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:31,705 INFO L353 BasicCegarLoop]: trace histogram [156, 155, 1, 1, 1] [2018-07-23 15:24:31,705 INFO L414 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:31,705 INFO L82 PathProgramCache]: Analyzing trace with hash 313425381, now seen corresponding path program 155 times [2018-07-23 15:24:31,705 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:32,505 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 15:24:32,505 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:32,506 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157] total 157 [2018-07-23 15:24:32,506 INFO L450 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-07-23 15:24:32,507 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-07-23 15:24:32,508 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:24:32,509 INFO L87 Difference]: Start difference. First operand 315 states and 315 transitions. Second operand 158 states. [2018-07-23 15:24:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:32,972 INFO L93 Difference]: Finished difference Result 319 states and 319 transitions. [2018-07-23 15:24:32,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-07-23 15:24:32,972 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 314 [2018-07-23 15:24:32,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:32,973 INFO L225 Difference]: With dead ends: 319 [2018-07-23 15:24:32,973 INFO L226 Difference]: Without dead ends: 317 [2018-07-23 15:24:32,974 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:24:32,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2018-07-23 15:24:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2018-07-23 15:24:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-07-23 15:24:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2018-07-23 15:24:32,977 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 314 [2018-07-23 15:24:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:32,978 INFO L471 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2018-07-23 15:24:32,978 INFO L472 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-07-23 15:24:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2018-07-23 15:24:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-07-23 15:24:32,978 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:32,979 INFO L353 BasicCegarLoop]: trace histogram [157, 156, 1, 1, 1] [2018-07-23 15:24:32,979 INFO L414 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:32,979 INFO L82 PathProgramCache]: Analyzing trace with hash 554132511, now seen corresponding path program 156 times [2018-07-23 15:24:32,979 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:33,610 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 15:24:33,610 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:33,610 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158] total 158 [2018-07-23 15:24:33,610 INFO L450 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-07-23 15:24:33,612 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-07-23 15:24:33,613 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-07-23 15:24:33,613 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand 159 states. [2018-07-23 15:24:34,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:34,292 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2018-07-23 15:24:34,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-07-23 15:24:34,293 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 316 [2018-07-23 15:24:34,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:34,293 INFO L225 Difference]: With dead ends: 321 [2018-07-23 15:24:34,293 INFO L226 Difference]: Without dead ends: 319 [2018-07-23 15:24:34,295 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 1 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 15:24:34,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-07-23 15:24:34,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-07-23 15:24:34,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-07-23 15:24:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 319 transitions. [2018-07-23 15:24:34,298 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 319 transitions. Word has length 316 [2018-07-23 15:24:34,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:34,298 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 319 transitions. [2018-07-23 15:24:34,298 INFO L472 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-07-23 15:24:34,299 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 319 transitions. [2018-07-23 15:24:34,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-07-23 15:24:34,299 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:34,299 INFO L353 BasicCegarLoop]: trace histogram [158, 157, 1, 1, 1] [2018-07-23 15:24:34,299 INFO L414 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:34,300 INFO L82 PathProgramCache]: Analyzing trace with hash -54549543, now seen corresponding path program 157 times [2018-07-23 15:24:34,300 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:35,008 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 15:24:35,008 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:35,008 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159] total 159 [2018-07-23 15:24:35,009 INFO L450 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-07-23 15:24:35,011 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-07-23 15:24:35,012 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:24:35,012 INFO L87 Difference]: Start difference. First operand 319 states and 319 transitions. Second operand 160 states. [2018-07-23 15:24:36,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:36,091 INFO L93 Difference]: Finished difference Result 323 states and 323 transitions. [2018-07-23 15:24:36,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-07-23 15:24:36,091 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 318 [2018-07-23 15:24:36,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:36,091 INFO L225 Difference]: With dead ends: 323 [2018-07-23 15:24:36,091 INFO L226 Difference]: Without dead ends: 321 [2018-07-23 15:24:36,093 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:24:36,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2018-07-23 15:24:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2018-07-23 15:24:36,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2018-07-23 15:24:36,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 321 transitions. [2018-07-23 15:24:36,097 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 321 transitions. Word has length 318 [2018-07-23 15:24:36,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:36,097 INFO L471 AbstractCegarLoop]: Abstraction has 321 states and 321 transitions. [2018-07-23 15:24:36,097 INFO L472 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-07-23 15:24:36,098 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 321 transitions. [2018-07-23 15:24:36,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2018-07-23 15:24:36,098 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:36,098 INFO L353 BasicCegarLoop]: trace histogram [159, 158, 1, 1, 1] [2018-07-23 15:24:36,099 INFO L414 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:36,099 INFO L82 PathProgramCache]: Analyzing trace with hash -882451181, now seen corresponding path program 158 times [2018-07-23 15:24:36,099 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:36,845 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 15:24:36,845 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:36,845 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160] total 160 [2018-07-23 15:24:36,846 INFO L450 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-07-23 15:24:36,847 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-07-23 15:24:36,848 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-07-23 15:24:36,848 INFO L87 Difference]: Start difference. First operand 321 states and 321 transitions. Second operand 161 states. [2018-07-23 15:24:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:37,108 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2018-07-23 15:24:37,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-07-23 15:24:37,108 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 320 [2018-07-23 15:24:37,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:37,109 INFO L225 Difference]: With dead ends: 325 [2018-07-23 15:24:37,109 INFO L226 Difference]: Without dead ends: 323 [2018-07-23 15:24:37,110 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-07-23 15:24:37,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-07-23 15:24:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-07-23 15:24:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-07-23 15:24:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2018-07-23 15:24:37,114 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 320 [2018-07-23 15:24:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:37,114 INFO L471 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2018-07-23 15:24:37,114 INFO L472 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-07-23 15:24:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2018-07-23 15:24:37,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-07-23 15:24:37,115 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:37,115 INFO L353 BasicCegarLoop]: trace histogram [160, 159, 1, 1, 1] [2018-07-23 15:24:37,115 INFO L414 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:37,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1926975539, now seen corresponding path program 159 times [2018-07-23 15:24:37,115 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:37,748 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 15:24:37,748 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:37,748 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161] total 161 [2018-07-23 15:24:37,749 INFO L450 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-07-23 15:24:37,750 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-07-23 15:24:37,751 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-07-23 15:24:37,751 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 162 states. [2018-07-23 15:24:38,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:38,531 INFO L93 Difference]: Finished difference Result 327 states and 327 transitions. [2018-07-23 15:24:38,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-07-23 15:24:38,531 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 322 [2018-07-23 15:24:38,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:38,532 INFO L225 Difference]: With dead ends: 327 [2018-07-23 15:24:38,532 INFO L226 Difference]: Without dead ends: 325 [2018-07-23 15:24:38,533 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 1 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 15:24:38,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2018-07-23 15:24:38,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2018-07-23 15:24:38,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-07-23 15:24:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 325 transitions. [2018-07-23 15:24:38,537 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 325 transitions. Word has length 322 [2018-07-23 15:24:38,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:38,537 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 325 transitions. [2018-07-23 15:24:38,537 INFO L472 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-07-23 15:24:38,537 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 325 transitions. [2018-07-23 15:24:38,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-07-23 15:24:38,538 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:38,538 INFO L353 BasicCegarLoop]: trace histogram [161, 160, 1, 1, 1] [2018-07-23 15:24:38,538 INFO L414 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:38,538 INFO L82 PathProgramCache]: Analyzing trace with hash -692536313, now seen corresponding path program 160 times [2018-07-23 15:24:38,538 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:39,276 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 15:24:39,276 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:39,277 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [162] total 162 [2018-07-23 15:24:39,277 INFO L450 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-07-23 15:24:39,279 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-07-23 15:24:39,280 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:24:39,281 INFO L87 Difference]: Start difference. First operand 325 states and 325 transitions. Second operand 163 states. [2018-07-23 15:24:40,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:40,473 INFO L93 Difference]: Finished difference Result 329 states and 329 transitions. [2018-07-23 15:24:40,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-07-23 15:24:40,473 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 324 [2018-07-23 15:24:40,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:40,473 INFO L225 Difference]: With dead ends: 329 [2018-07-23 15:24:40,474 INFO L226 Difference]: Without dead ends: 327 [2018-07-23 15:24:40,476 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:24:40,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-07-23 15:24:40,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2018-07-23 15:24:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-07-23 15:24:40,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2018-07-23 15:24:40,480 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 324 [2018-07-23 15:24:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:40,480 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2018-07-23 15:24:40,480 INFO L472 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-07-23 15:24:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2018-07-23 15:24:40,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-07-23 15:24:40,481 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:40,481 INFO L353 BasicCegarLoop]: trace histogram [162, 161, 1, 1, 1] [2018-07-23 15:24:40,481 INFO L414 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:40,481 INFO L82 PathProgramCache]: Analyzing trace with hash 192586177, now seen corresponding path program 161 times [2018-07-23 15:24:40,481 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:41,396 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 15:24:41,396 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:41,396 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163] total 163 [2018-07-23 15:24:41,397 INFO L450 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-07-23 15:24:41,398 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-07-23 15:24:41,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-07-23 15:24:41,399 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand 164 states. [2018-07-23 15:24:42,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:42,256 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2018-07-23 15:24:42,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-07-23 15:24:42,256 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 326 [2018-07-23 15:24:42,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:42,257 INFO L225 Difference]: With dead ends: 331 [2018-07-23 15:24:42,257 INFO L226 Difference]: Without dead ends: 329 [2018-07-23 15:24:42,258 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-07-23 15:24:42,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2018-07-23 15:24:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2018-07-23 15:24:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-07-23 15:24:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 329 transitions. [2018-07-23 15:24:42,262 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 329 transitions. Word has length 326 [2018-07-23 15:24:42,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:42,262 INFO L471 AbstractCegarLoop]: Abstraction has 329 states and 329 transitions. [2018-07-23 15:24:42,262 INFO L472 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-07-23 15:24:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 329 transitions. [2018-07-23 15:24:42,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-07-23 15:24:42,263 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:42,263 INFO L353 BasicCegarLoop]: trace histogram [163, 162, 1, 1, 1] [2018-07-23 15:24:42,263 INFO L414 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:42,263 INFO L82 PathProgramCache]: Analyzing trace with hash 391774459, now seen corresponding path program 162 times [2018-07-23 15:24:42,263 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:43,130 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 15:24:43,130 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:43,130 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164] total 164 [2018-07-23 15:24:43,130 INFO L450 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-07-23 15:24:43,132 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-07-23 15:24:43,134 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-07-23 15:24:43,134 INFO L87 Difference]: Start difference. First operand 329 states and 329 transitions. Second operand 165 states. [2018-07-23 15:24:43,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:43,430 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2018-07-23 15:24:43,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-07-23 15:24:43,430 INFO L78 Accepts]: Start accepts. Automaton has 165 states. Word has length 328 [2018-07-23 15:24:43,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:43,430 INFO L225 Difference]: With dead ends: 333 [2018-07-23 15:24:43,430 INFO L226 Difference]: Without dead ends: 331 [2018-07-23 15:24:43,432 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-07-23 15:24:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-07-23 15:24:43,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-07-23 15:24:43,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-07-23 15:24:43,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2018-07-23 15:24:43,436 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 328 [2018-07-23 15:24:43,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:43,436 INFO L471 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2018-07-23 15:24:43,436 INFO L472 AbstractCegarLoop]: Interpolant automaton has 165 states. [2018-07-23 15:24:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2018-07-23 15:24:43,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-07-23 15:24:43,437 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:43,437 INFO L353 BasicCegarLoop]: trace histogram [164, 163, 1, 1, 1] [2018-07-23 15:24:43,437 INFO L414 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:43,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1461814859, now seen corresponding path program 163 times [2018-07-23 15:24:43,438 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:44,234 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 15:24:44,234 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:44,234 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165] total 165 [2018-07-23 15:24:44,234 INFO L450 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-07-23 15:24:44,237 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-07-23 15:24:44,239 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-07-23 15:24:44,239 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand 166 states. [2018-07-23 15:24:44,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:44,750 INFO L93 Difference]: Finished difference Result 335 states and 335 transitions. [2018-07-23 15:24:44,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-07-23 15:24:44,750 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 330 [2018-07-23 15:24:44,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:44,751 INFO L225 Difference]: With dead ends: 335 [2018-07-23 15:24:44,751 INFO L226 Difference]: Without dead ends: 333 [2018-07-23 15:24:44,753 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 1 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 15:24:44,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-07-23 15:24:44,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2018-07-23 15:24:44,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2018-07-23 15:24:44,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 333 transitions. [2018-07-23 15:24:44,759 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 333 transitions. Word has length 330 [2018-07-23 15:24:44,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:44,759 INFO L471 AbstractCegarLoop]: Abstraction has 333 states and 333 transitions. [2018-07-23 15:24:44,759 INFO L472 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-07-23 15:24:44,759 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 333 transitions. [2018-07-23 15:24:44,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-07-23 15:24:44,760 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:44,761 INFO L353 BasicCegarLoop]: trace histogram [165, 164, 1, 1, 1] [2018-07-23 15:24:44,761 INFO L414 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:44,761 INFO L82 PathProgramCache]: Analyzing trace with hash -349721617, now seen corresponding path program 164 times [2018-07-23 15:24:44,761 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:45,692 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 15:24:45,693 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:45,693 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [166] total 166 [2018-07-23 15:24:45,693 INFO L450 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-07-23 15:24:45,694 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-07-23 15:24:45,695 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:24:45,695 INFO L87 Difference]: Start difference. First operand 333 states and 333 transitions. Second operand 167 states. [2018-07-23 15:24:46,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:46,516 INFO L93 Difference]: Finished difference Result 337 states and 337 transitions. [2018-07-23 15:24:46,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-07-23 15:24:46,516 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 332 [2018-07-23 15:24:46,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:46,517 INFO L225 Difference]: With dead ends: 337 [2018-07-23 15:24:46,517 INFO L226 Difference]: Without dead ends: 335 [2018-07-23 15:24:46,518 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:24:46,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-07-23 15:24:46,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2018-07-23 15:24:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-07-23 15:24:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2018-07-23 15:24:46,521 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 332 [2018-07-23 15:24:46,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:46,521 INFO L471 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2018-07-23 15:24:46,521 INFO L472 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-07-23 15:24:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2018-07-23 15:24:46,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-07-23 15:24:46,522 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:46,522 INFO L353 BasicCegarLoop]: trace histogram [166, 165, 1, 1, 1] [2018-07-23 15:24:46,522 INFO L414 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:46,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1074972759, now seen corresponding path program 165 times [2018-07-23 15:24:46,523 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:47,286 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 15:24:47,286 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:47,286 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167] total 167 [2018-07-23 15:24:47,287 INFO L450 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-07-23 15:24:47,289 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-07-23 15:24:47,290 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-07-23 15:24:47,290 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand 168 states. [2018-07-23 15:24:48,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:48,244 INFO L93 Difference]: Finished difference Result 339 states and 339 transitions. [2018-07-23 15:24:48,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-07-23 15:24:48,244 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 334 [2018-07-23 15:24:48,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:48,244 INFO L225 Difference]: With dead ends: 339 [2018-07-23 15:24:48,245 INFO L226 Difference]: Without dead ends: 337 [2018-07-23 15:24:48,247 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-07-23 15:24:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2018-07-23 15:24:48,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2018-07-23 15:24:48,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2018-07-23 15:24:48,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 337 transitions. [2018-07-23 15:24:48,251 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 337 transitions. Word has length 334 [2018-07-23 15:24:48,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:48,251 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 337 transitions. [2018-07-23 15:24:48,251 INFO L472 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-07-23 15:24:48,251 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 337 transitions. [2018-07-23 15:24:48,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-07-23 15:24:48,252 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:48,252 INFO L353 BasicCegarLoop]: trace histogram [167, 166, 1, 1, 1] [2018-07-23 15:24:48,252 INFO L414 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:48,252 INFO L82 PathProgramCache]: Analyzing trace with hash 2038349027, now seen corresponding path program 166 times [2018-07-23 15:24:48,252 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:49,111 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 15:24:49,111 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:49,111 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [168] total 168 [2018-07-23 15:24:49,112 INFO L450 AbstractCegarLoop]: Interpolant automaton has 169 states [2018-07-23 15:24:49,114 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2018-07-23 15:24:49,116 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:24:49,116 INFO L87 Difference]: Start difference. First operand 337 states and 337 transitions. Second operand 169 states. [2018-07-23 15:24:50,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:50,111 INFO L93 Difference]: Finished difference Result 341 states and 341 transitions. [2018-07-23 15:24:50,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2018-07-23 15:24:50,111 INFO L78 Accepts]: Start accepts. Automaton has 169 states. Word has length 336 [2018-07-23 15:24:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:50,111 INFO L225 Difference]: With dead ends: 341 [2018-07-23 15:24:50,112 INFO L226 Difference]: Without dead ends: 339 [2018-07-23 15:24:50,113 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:24:50,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-07-23 15:24:50,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-07-23 15:24:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-07-23 15:24:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 339 transitions. [2018-07-23 15:24:50,117 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 339 transitions. Word has length 336 [2018-07-23 15:24:50,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:50,117 INFO L471 AbstractCegarLoop]: Abstraction has 339 states and 339 transitions. [2018-07-23 15:24:50,117 INFO L472 AbstractCegarLoop]: Interpolant automaton has 169 states. [2018-07-23 15:24:50,117 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 339 transitions. [2018-07-23 15:24:50,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-07-23 15:24:50,118 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:50,118 INFO L353 BasicCegarLoop]: trace histogram [168, 167, 1, 1, 1] [2018-07-23 15:24:50,118 INFO L414 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:50,118 INFO L82 PathProgramCache]: Analyzing trace with hash 348380061, now seen corresponding path program 167 times [2018-07-23 15:24:50,118 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:50,940 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 15:24:50,941 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:50,941 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [169] total 169 [2018-07-23 15:24:50,941 INFO L450 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-07-23 15:24:50,942 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-07-23 15:24:50,943 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-07-23 15:24:50,943 INFO L87 Difference]: Start difference. First operand 339 states and 339 transitions. Second operand 170 states. [2018-07-23 15:24:51,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:51,929 INFO L93 Difference]: Finished difference Result 343 states and 343 transitions. [2018-07-23 15:24:51,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2018-07-23 15:24:51,929 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 338 [2018-07-23 15:24:51,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:51,930 INFO L225 Difference]: With dead ends: 343 [2018-07-23 15:24:51,930 INFO L226 Difference]: Without dead ends: 341 [2018-07-23 15:24:51,931 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-07-23 15:24:51,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2018-07-23 15:24:51,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2018-07-23 15:24:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-07-23 15:24:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 341 transitions. [2018-07-23 15:24:51,935 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 341 transitions. Word has length 338 [2018-07-23 15:24:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:51,935 INFO L471 AbstractCegarLoop]: Abstraction has 341 states and 341 transitions. [2018-07-23 15:24:51,935 INFO L472 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-07-23 15:24:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 341 transitions. [2018-07-23 15:24:51,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-07-23 15:24:51,936 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:51,936 INFO L353 BasicCegarLoop]: trace histogram [169, 168, 1, 1, 1] [2018-07-23 15:24:51,937 INFO L414 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:51,937 INFO L82 PathProgramCache]: Analyzing trace with hash -214158377, now seen corresponding path program 168 times [2018-07-23 15:24:51,937 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:52,774 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 15:24:52,774 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:52,774 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [170] total 170 [2018-07-23 15:24:52,774 INFO L450 AbstractCegarLoop]: Interpolant automaton has 171 states [2018-07-23 15:24:52,777 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2018-07-23 15:24:52,778 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-07-23 15:24:52,778 INFO L87 Difference]: Start difference. First operand 341 states and 341 transitions. Second operand 171 states. [2018-07-23 15:24:53,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:53,859 INFO L93 Difference]: Finished difference Result 345 states and 345 transitions. [2018-07-23 15:24:53,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2018-07-23 15:24:53,859 INFO L78 Accepts]: Start accepts. Automaton has 171 states. Word has length 340 [2018-07-23 15:24:53,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:53,860 INFO L225 Difference]: With dead ends: 345 [2018-07-23 15:24:53,860 INFO L226 Difference]: Without dead ends: 343 [2018-07-23 15:24:53,862 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-07-23 15:24:53,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-07-23 15:24:53,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-07-23 15:24:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-07-23 15:24:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 343 transitions. [2018-07-23 15:24:53,865 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 343 transitions. Word has length 340 [2018-07-23 15:24:53,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:53,865 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 343 transitions. [2018-07-23 15:24:53,866 INFO L472 AbstractCegarLoop]: Interpolant automaton has 171 states. [2018-07-23 15:24:53,866 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 343 transitions. [2018-07-23 15:24:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-07-23 15:24:53,866 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:53,867 INFO L353 BasicCegarLoop]: trace histogram [170, 169, 1, 1, 1] [2018-07-23 15:24:53,867 INFO L414 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:53,867 INFO L82 PathProgramCache]: Analyzing trace with hash 352282001, now seen corresponding path program 169 times [2018-07-23 15:24:53,867 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:54,743 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 15:24:54,743 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:54,743 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [171] total 171 [2018-07-23 15:24:54,744 INFO L450 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-07-23 15:24:54,746 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-07-23 15:24:54,748 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-07-23 15:24:54,748 INFO L87 Difference]: Start difference. First operand 343 states and 343 transitions. Second operand 172 states. [2018-07-23 15:24:55,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:55,811 INFO L93 Difference]: Finished difference Result 347 states and 347 transitions. [2018-07-23 15:24:55,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2018-07-23 15:24:55,812 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 342 [2018-07-23 15:24:55,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:55,812 INFO L225 Difference]: With dead ends: 347 [2018-07-23 15:24:55,812 INFO L226 Difference]: Without dead ends: 345 [2018-07-23 15:24:55,814 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 1 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 15:24:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2018-07-23 15:24:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2018-07-23 15:24:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2018-07-23 15:24:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 345 transitions. [2018-07-23 15:24:55,818 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 345 transitions. Word has length 342 [2018-07-23 15:24:55,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:55,818 INFO L471 AbstractCegarLoop]: Abstraction has 345 states and 345 transitions. [2018-07-23 15:24:55,818 INFO L472 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-07-23 15:24:55,819 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 345 transitions. [2018-07-23 15:24:55,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-07-23 15:24:55,819 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:55,819 INFO L353 BasicCegarLoop]: trace histogram [171, 170, 1, 1, 1] [2018-07-23 15:24:55,820 INFO L414 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:55,820 INFO L82 PathProgramCache]: Analyzing trace with hash -759361333, now seen corresponding path program 170 times [2018-07-23 15:24:55,820 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:56,648 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 15:24:56,649 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:56,649 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [172] total 172 [2018-07-23 15:24:56,649 INFO L450 AbstractCegarLoop]: Interpolant automaton has 173 states [2018-07-23 15:24:56,652 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2018-07-23 15:24:56,654 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-07-23 15:24:56,654 INFO L87 Difference]: Start difference. First operand 345 states and 345 transitions. Second operand 173 states. [2018-07-23 15:24:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:57,673 INFO L93 Difference]: Finished difference Result 349 states and 349 transitions. [2018-07-23 15:24:57,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2018-07-23 15:24:57,673 INFO L78 Accepts]: Start accepts. Automaton has 173 states. Word has length 344 [2018-07-23 15:24:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:57,674 INFO L225 Difference]: With dead ends: 349 [2018-07-23 15:24:57,674 INFO L226 Difference]: Without dead ends: 347 [2018-07-23 15:24:57,676 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-07-23 15:24:57,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-07-23 15:24:57,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-07-23 15:24:57,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-07-23 15:24:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2018-07-23 15:24:57,680 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 344 [2018-07-23 15:24:57,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:57,680 INFO L471 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2018-07-23 15:24:57,680 INFO L472 AbstractCegarLoop]: Interpolant automaton has 173 states. [2018-07-23 15:24:57,680 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2018-07-23 15:24:57,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-07-23 15:24:57,681 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:57,681 INFO L353 BasicCegarLoop]: trace histogram [172, 171, 1, 1, 1] [2018-07-23 15:24:57,681 INFO L414 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:57,681 INFO L82 PathProgramCache]: Analyzing trace with hash 398251397, now seen corresponding path program 171 times [2018-07-23 15:24:57,681 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:58,526 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 15:24:58,527 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:58,527 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [173] total 173 [2018-07-23 15:24:58,527 INFO L450 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-07-23 15:24:58,529 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-07-23 15:24:58,531 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-07-23 15:24:58,531 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand 174 states. [2018-07-23 15:24:59,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:59,281 INFO L93 Difference]: Finished difference Result 351 states and 351 transitions. [2018-07-23 15:24:59,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2018-07-23 15:24:59,281 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 346 [2018-07-23 15:24:59,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:59,281 INFO L225 Difference]: With dead ends: 351 [2018-07-23 15:24:59,281 INFO L226 Difference]: Without dead ends: 349 [2018-07-23 15:24:59,283 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 1 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 15:24:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2018-07-23 15:24:59,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2018-07-23 15:24:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-07-23 15:24:59,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 349 transitions. [2018-07-23 15:24:59,287 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 349 transitions. Word has length 346 [2018-07-23 15:24:59,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:59,287 INFO L471 AbstractCegarLoop]: Abstraction has 349 states and 349 transitions. [2018-07-23 15:24:59,287 INFO L472 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-07-23 15:24:59,287 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 349 transitions. [2018-07-23 15:24:59,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-07-23 15:24:59,288 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:59,288 INFO L353 BasicCegarLoop]: trace histogram [173, 172, 1, 1, 1] [2018-07-23 15:24:59,288 INFO L414 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:59,288 INFO L82 PathProgramCache]: Analyzing trace with hash 467555263, now seen corresponding path program 172 times [2018-07-23 15:24:59,288 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:00,157 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 15:25:00,157 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:00,157 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [174] total 174 [2018-07-23 15:25:00,157 INFO L450 AbstractCegarLoop]: Interpolant automaton has 175 states [2018-07-23 15:25:00,160 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2018-07-23 15:25:00,161 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:25:00,161 INFO L87 Difference]: Start difference. First operand 349 states and 349 transitions. Second operand 175 states. [2018-07-23 15:25:00,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:00,518 INFO L93 Difference]: Finished difference Result 353 states and 353 transitions. [2018-07-23 15:25:00,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2018-07-23 15:25:00,518 INFO L78 Accepts]: Start accepts. Automaton has 175 states. Word has length 348 [2018-07-23 15:25:00,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:00,519 INFO L225 Difference]: With dead ends: 353 [2018-07-23 15:25:00,519 INFO L226 Difference]: Without dead ends: 351 [2018-07-23 15:25:00,521 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:25:00,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-07-23 15:25:00,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-07-23 15:25:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-07-23 15:25:00,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 351 transitions. [2018-07-23 15:25:00,524 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 351 transitions. Word has length 348 [2018-07-23 15:25:00,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:00,524 INFO L471 AbstractCegarLoop]: Abstraction has 351 states and 351 transitions. [2018-07-23 15:25:00,525 INFO L472 AbstractCegarLoop]: Interpolant automaton has 175 states. [2018-07-23 15:25:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 351 transitions. [2018-07-23 15:25:00,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-07-23 15:25:00,525 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:00,526 INFO L353 BasicCegarLoop]: trace histogram [174, 173, 1, 1, 1] [2018-07-23 15:25:00,526 INFO L414 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:00,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1650906247, now seen corresponding path program 173 times [2018-07-23 15:25:00,526 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:01,488 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 15:25:01,489 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:01,489 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [175] total 175 [2018-07-23 15:25:01,489 INFO L450 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-07-23 15:25:01,492 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-07-23 15:25:01,494 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15400, Invalid=15400, Unknown=0, NotChecked=0, Total=30800 [2018-07-23 15:25:01,494 INFO L87 Difference]: Start difference. First operand 351 states and 351 transitions. Second operand 176 states. [2018-07-23 15:25:02,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:02,069 INFO L93 Difference]: Finished difference Result 355 states and 355 transitions. [2018-07-23 15:25:02,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2018-07-23 15:25:02,070 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 350 [2018-07-23 15:25:02,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:02,070 INFO L225 Difference]: With dead ends: 355 [2018-07-23 15:25:02,070 INFO L226 Difference]: Without dead ends: 353 [2018-07-23 15:25:02,072 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 1 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 15:25:02,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2018-07-23 15:25:02,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2018-07-23 15:25:02,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2018-07-23 15:25:02,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 353 transitions. [2018-07-23 15:25:02,076 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 353 transitions. Word has length 350 [2018-07-23 15:25:02,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:02,076 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 353 transitions. [2018-07-23 15:25:02,076 INFO L472 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-07-23 15:25:02,076 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 353 transitions. [2018-07-23 15:25:02,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2018-07-23 15:25:02,077 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:02,077 INFO L353 BasicCegarLoop]: trace histogram [175, 174, 1, 1, 1] [2018-07-23 15:25:02,077 INFO L414 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:02,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1677919053, now seen corresponding path program 174 times [2018-07-23 15:25:02,077 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:02,933 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 15:25:02,933 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:02,933 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [176] total 176 [2018-07-23 15:25:02,934 INFO L450 AbstractCegarLoop]: Interpolant automaton has 177 states [2018-07-23 15:25:02,936 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2018-07-23 15:25:02,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2018-07-23 15:25:02,938 INFO L87 Difference]: Start difference. First operand 353 states and 353 transitions. Second operand 177 states. [2018-07-23 15:25:04,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:04,249 INFO L93 Difference]: Finished difference Result 357 states and 357 transitions. [2018-07-23 15:25:04,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2018-07-23 15:25:04,249 INFO L78 Accepts]: Start accepts. Automaton has 177 states. Word has length 352 [2018-07-23 15:25:04,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:04,250 INFO L225 Difference]: With dead ends: 357 [2018-07-23 15:25:04,250 INFO L226 Difference]: Without dead ends: 355 [2018-07-23 15:25:04,252 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2018-07-23 15:25:04,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-07-23 15:25:04,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2018-07-23 15:25:04,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-07-23 15:25:04,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 355 transitions. [2018-07-23 15:25:04,256 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 355 transitions. Word has length 352 [2018-07-23 15:25:04,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:04,256 INFO L471 AbstractCegarLoop]: Abstraction has 355 states and 355 transitions. [2018-07-23 15:25:04,256 INFO L472 AbstractCegarLoop]: Interpolant automaton has 177 states. [2018-07-23 15:25:04,256 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 355 transitions. [2018-07-23 15:25:04,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-07-23 15:25:04,257 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:04,257 INFO L353 BasicCegarLoop]: trace histogram [176, 175, 1, 1, 1] [2018-07-23 15:25:04,258 INFO L414 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:04,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1867421843, now seen corresponding path program 175 times [2018-07-23 15:25:04,258 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:05,229 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 15:25:05,229 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:05,230 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [177] total 177 [2018-07-23 15:25:05,230 INFO L450 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-07-23 15:25:05,231 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-07-23 15:25:05,232 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15753, Invalid=15753, Unknown=0, NotChecked=0, Total=31506 [2018-07-23 15:25:05,232 INFO L87 Difference]: Start difference. First operand 355 states and 355 transitions. Second operand 178 states. [2018-07-23 15:25:06,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:06,634 INFO L93 Difference]: Finished difference Result 359 states and 359 transitions. [2018-07-23 15:25:06,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2018-07-23 15:25:06,634 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 354 [2018-07-23 15:25:06,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:06,634 INFO L225 Difference]: With dead ends: 359 [2018-07-23 15:25:06,635 INFO L226 Difference]: Without dead ends: 357 [2018-07-23 15:25:06,636 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15753, Invalid=15753, Unknown=0, NotChecked=0, Total=31506 [2018-07-23 15:25:06,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2018-07-23 15:25:06,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2018-07-23 15:25:06,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2018-07-23 15:25:06,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 357 transitions. [2018-07-23 15:25:06,640 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 357 transitions. Word has length 354 [2018-07-23 15:25:06,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:06,640 INFO L471 AbstractCegarLoop]: Abstraction has 357 states and 357 transitions. [2018-07-23 15:25:06,641 INFO L472 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-07-23 15:25:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 357 transitions. [2018-07-23 15:25:06,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2018-07-23 15:25:06,642 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:06,642 INFO L353 BasicCegarLoop]: trace histogram [177, 176, 1, 1, 1] [2018-07-23 15:25:06,642 INFO L414 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:06,642 INFO L82 PathProgramCache]: Analyzing trace with hash 703990695, now seen corresponding path program 176 times [2018-07-23 15:25:06,642 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:07,668 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 15:25:07,668 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:07,668 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [178] total 178 [2018-07-23 15:25:07,669 INFO L450 AbstractCegarLoop]: Interpolant automaton has 179 states [2018-07-23 15:25:07,671 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2018-07-23 15:25:07,674 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15931, Invalid=15931, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:25:07,674 INFO L87 Difference]: Start difference. First operand 357 states and 357 transitions. Second operand 179 states. [2018-07-23 15:25:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:08,296 INFO L93 Difference]: Finished difference Result 361 states and 361 transitions. [2018-07-23 15:25:08,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2018-07-23 15:25:08,296 INFO L78 Accepts]: Start accepts. Automaton has 179 states. Word has length 356 [2018-07-23 15:25:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:08,297 INFO L225 Difference]: With dead ends: 361 [2018-07-23 15:25:08,297 INFO L226 Difference]: Without dead ends: 359 [2018-07-23 15:25:08,300 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15931, Invalid=15931, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:25:08,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-07-23 15:25:08,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2018-07-23 15:25:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-07-23 15:25:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 359 transitions. [2018-07-23 15:25:08,304 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 359 transitions. Word has length 356 [2018-07-23 15:25:08,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:08,304 INFO L471 AbstractCegarLoop]: Abstraction has 359 states and 359 transitions. [2018-07-23 15:25:08,305 INFO L472 AbstractCegarLoop]: Interpolant automaton has 179 states. [2018-07-23 15:25:08,305 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 359 transitions. [2018-07-23 15:25:08,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-07-23 15:25:08,306 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:08,306 INFO L353 BasicCegarLoop]: trace histogram [178, 177, 1, 1, 1] [2018-07-23 15:25:08,306 INFO L414 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:08,306 INFO L82 PathProgramCache]: Analyzing trace with hash -2069722783, now seen corresponding path program 177 times [2018-07-23 15:25:08,306 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:09,377 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 15:25:09,377 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:09,378 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [179] total 179 [2018-07-23 15:25:09,378 INFO L450 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-07-23 15:25:09,380 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-07-23 15:25:09,382 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16110, Invalid=16110, Unknown=0, NotChecked=0, Total=32220 [2018-07-23 15:25:09,382 INFO L87 Difference]: Start difference. First operand 359 states and 359 transitions. Second operand 180 states. [2018-07-23 15:25:10,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:10,335 INFO L93 Difference]: Finished difference Result 363 states and 363 transitions. [2018-07-23 15:25:10,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2018-07-23 15:25:10,336 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 358 [2018-07-23 15:25:10,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:10,336 INFO L225 Difference]: With dead ends: 363 [2018-07-23 15:25:10,336 INFO L226 Difference]: Without dead ends: 361 [2018-07-23 15:25:10,340 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=16110, Invalid=16110, Unknown=0, NotChecked=0, Total=32220 [2018-07-23 15:25:10,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2018-07-23 15:25:10,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2018-07-23 15:25:10,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-07-23 15:25:10,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 361 transitions. [2018-07-23 15:25:10,345 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 361 transitions. Word has length 358 [2018-07-23 15:25:10,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:10,345 INFO L471 AbstractCegarLoop]: Abstraction has 361 states and 361 transitions. [2018-07-23 15:25:10,345 INFO L472 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-07-23 15:25:10,345 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 361 transitions. [2018-07-23 15:25:10,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-07-23 15:25:10,346 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:10,347 INFO L353 BasicCegarLoop]: trace histogram [179, 178, 1, 1, 1] [2018-07-23 15:25:10,347 INFO L414 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:10,347 INFO L82 PathProgramCache]: Analyzing trace with hash -433684325, now seen corresponding path program 178 times [2018-07-23 15:25:10,347 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:11,248 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 15:25:11,249 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:11,249 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [180] total 180 [2018-07-23 15:25:11,249 INFO L450 AbstractCegarLoop]: Interpolant automaton has 181 states [2018-07-23 15:25:11,251 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2018-07-23 15:25:11,252 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16290, Invalid=16290, Unknown=0, NotChecked=0, Total=32580 [2018-07-23 15:25:11,252 INFO L87 Difference]: Start difference. First operand 361 states and 361 transitions. Second operand 181 states. [2018-07-23 15:25:12,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:12,508 INFO L93 Difference]: Finished difference Result 365 states and 365 transitions. [2018-07-23 15:25:12,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2018-07-23 15:25:12,508 INFO L78 Accepts]: Start accepts. Automaton has 181 states. Word has length 360 [2018-07-23 15:25:12,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:12,509 INFO L225 Difference]: With dead ends: 365 [2018-07-23 15:25:12,509 INFO L226 Difference]: Without dead ends: 363 [2018-07-23 15:25:12,511 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 1 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 15:25:12,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-07-23 15:25:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2018-07-23 15:25:12,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2018-07-23 15:25:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2018-07-23 15:25:12,515 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 360 [2018-07-23 15:25:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:12,515 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2018-07-23 15:25:12,515 INFO L472 AbstractCegarLoop]: Interpolant automaton has 181 states. [2018-07-23 15:25:12,515 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2018-07-23 15:25:12,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-07-23 15:25:12,516 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:12,516 INFO L353 BasicCegarLoop]: trace histogram [180, 179, 1, 1, 1] [2018-07-23 15:25:12,516 INFO L414 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:12,517 INFO L82 PathProgramCache]: Analyzing trace with hash -158756523, now seen corresponding path program 179 times [2018-07-23 15:25:12,517 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:13,413 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 15:25:13,414 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:13,414 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [181] total 181 [2018-07-23 15:25:13,414 INFO L450 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-07-23 15:25:13,417 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-07-23 15:25:13,418 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16471, Invalid=16471, Unknown=0, NotChecked=0, Total=32942 [2018-07-23 15:25:13,418 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand 182 states. [2018-07-23 15:25:13,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:13,776 INFO L93 Difference]: Finished difference Result 367 states and 367 transitions. [2018-07-23 15:25:13,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2018-07-23 15:25:13,776 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 362 [2018-07-23 15:25:13,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:13,776 INFO L225 Difference]: With dead ends: 367 [2018-07-23 15:25:13,777 INFO L226 Difference]: Without dead ends: 365 [2018-07-23 15:25:13,778 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 1 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 15:25:13,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2018-07-23 15:25:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2018-07-23 15:25:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2018-07-23 15:25:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 365 transitions. [2018-07-23 15:25:13,782 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 365 transitions. Word has length 362 [2018-07-23 15:25:13,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:13,782 INFO L471 AbstractCegarLoop]: Abstraction has 365 states and 365 transitions. [2018-07-23 15:25:13,782 INFO L472 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-07-23 15:25:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 365 transitions. [2018-07-23 15:25:13,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2018-07-23 15:25:13,783 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:13,783 INFO L353 BasicCegarLoop]: trace histogram [181, 180, 1, 1, 1] [2018-07-23 15:25:13,783 INFO L414 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:13,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2053856143, now seen corresponding path program 180 times [2018-07-23 15:25:13,784 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:14,710 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 15:25:14,710 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:14,711 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [182] total 182 [2018-07-23 15:25:14,711 INFO L450 AbstractCegarLoop]: Interpolant automaton has 183 states [2018-07-23 15:25:14,713 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2018-07-23 15:25:14,715 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16653, Invalid=16653, Unknown=0, NotChecked=0, Total=33306 [2018-07-23 15:25:14,715 INFO L87 Difference]: Start difference. First operand 365 states and 365 transitions. Second operand 183 states. [2018-07-23 15:25:15,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:15,964 INFO L93 Difference]: Finished difference Result 369 states and 369 transitions. [2018-07-23 15:25:15,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2018-07-23 15:25:15,964 INFO L78 Accepts]: Start accepts. Automaton has 183 states. Word has length 364 [2018-07-23 15:25:15,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:15,965 INFO L225 Difference]: With dead ends: 369 [2018-07-23 15:25:15,965 INFO L226 Difference]: Without dead ends: 367 [2018-07-23 15:25:15,966 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=16653, Invalid=16653, Unknown=0, NotChecked=0, Total=33306 [2018-07-23 15:25:15,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-07-23 15:25:15,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2018-07-23 15:25:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2018-07-23 15:25:15,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 367 transitions. [2018-07-23 15:25:15,970 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 367 transitions. Word has length 364 [2018-07-23 15:25:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:15,970 INFO L471 AbstractCegarLoop]: Abstraction has 367 states and 367 transitions. [2018-07-23 15:25:15,970 INFO L472 AbstractCegarLoop]: Interpolant automaton has 183 states. [2018-07-23 15:25:15,970 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 367 transitions. [2018-07-23 15:25:15,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-07-23 15:25:15,971 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:15,971 INFO L353 BasicCegarLoop]: trace histogram [182, 181, 1, 1, 1] [2018-07-23 15:25:15,971 INFO L414 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:15,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1929150647, now seen corresponding path program 181 times [2018-07-23 15:25:15,971 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:16,900 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 15:25:16,901 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:16,901 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [183] total 183 [2018-07-23 15:25:16,901 INFO L450 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-07-23 15:25:16,904 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-07-23 15:25:16,905 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16836, Invalid=16836, Unknown=0, NotChecked=0, Total=33672 [2018-07-23 15:25:16,905 INFO L87 Difference]: Start difference. First operand 367 states and 367 transitions. Second operand 184 states. [2018-07-23 15:25:17,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:17,471 INFO L93 Difference]: Finished difference Result 371 states and 371 transitions. [2018-07-23 15:25:17,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2018-07-23 15:25:17,471 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 366 [2018-07-23 15:25:17,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:17,472 INFO L225 Difference]: With dead ends: 371 [2018-07-23 15:25:17,472 INFO L226 Difference]: Without dead ends: 369 [2018-07-23 15:25:17,474 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 1 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 15:25:17,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2018-07-23 15:25:17,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2018-07-23 15:25:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-07-23 15:25:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 369 transitions. [2018-07-23 15:25:17,478 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 369 transitions. Word has length 366 [2018-07-23 15:25:17,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:17,478 INFO L471 AbstractCegarLoop]: Abstraction has 369 states and 369 transitions. [2018-07-23 15:25:17,478 INFO L472 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-07-23 15:25:17,478 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 369 transitions. [2018-07-23 15:25:17,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-07-23 15:25:17,479 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:17,479 INFO L353 BasicCegarLoop]: trace histogram [183, 182, 1, 1, 1] [2018-07-23 15:25:17,479 INFO L414 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:17,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1512152195, now seen corresponding path program 182 times [2018-07-23 15:25:17,480 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:18,413 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 15:25:18,414 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:18,414 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [184] total 184 [2018-07-23 15:25:18,414 INFO L450 AbstractCegarLoop]: Interpolant automaton has 185 states [2018-07-23 15:25:18,417 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2018-07-23 15:25:18,418 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17020, Invalid=17020, Unknown=0, NotChecked=0, Total=34040 [2018-07-23 15:25:18,418 INFO L87 Difference]: Start difference. First operand 369 states and 369 transitions. Second operand 185 states. [2018-07-23 15:25:19,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:19,982 INFO L93 Difference]: Finished difference Result 373 states and 373 transitions. [2018-07-23 15:25:19,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2018-07-23 15:25:19,982 INFO L78 Accepts]: Start accepts. Automaton has 185 states. Word has length 368 [2018-07-23 15:25:19,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:19,983 INFO L225 Difference]: With dead ends: 373 [2018-07-23 15:25:19,983 INFO L226 Difference]: Without dead ends: 371 [2018-07-23 15:25:19,986 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17020, Invalid=17020, Unknown=0, NotChecked=0, Total=34040 [2018-07-23 15:25:19,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2018-07-23 15:25:19,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2018-07-23 15:25:19,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2018-07-23 15:25:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 371 transitions. [2018-07-23 15:25:19,990 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 371 transitions. Word has length 368 [2018-07-23 15:25:19,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:19,990 INFO L471 AbstractCegarLoop]: Abstraction has 371 states and 371 transitions. [2018-07-23 15:25:19,990 INFO L472 AbstractCegarLoop]: Interpolant automaton has 185 states. [2018-07-23 15:25:19,990 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 371 transitions. [2018-07-23 15:25:19,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-07-23 15:25:19,991 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:19,991 INFO L353 BasicCegarLoop]: trace histogram [184, 183, 1, 1, 1] [2018-07-23 15:25:19,991 INFO L414 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:19,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1479365437, now seen corresponding path program 183 times [2018-07-23 15:25:19,992 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:20,985 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 15:25:20,985 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:20,986 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [185] total 185 [2018-07-23 15:25:20,986 INFO L450 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-07-23 15:25:20,988 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-07-23 15:25:20,990 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17205, Invalid=17205, Unknown=0, NotChecked=0, Total=34410 [2018-07-23 15:25:20,990 INFO L87 Difference]: Start difference. First operand 371 states and 371 transitions. Second operand 186 states. [2018-07-23 15:25:21,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:21,469 INFO L93 Difference]: Finished difference Result 375 states and 375 transitions. [2018-07-23 15:25:21,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2018-07-23 15:25:21,470 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 370 [2018-07-23 15:25:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:21,470 INFO L225 Difference]: With dead ends: 375 [2018-07-23 15:25:21,470 INFO L226 Difference]: Without dead ends: 373 [2018-07-23 15:25:21,472 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17205, Invalid=17205, Unknown=0, NotChecked=0, Total=34410 [2018-07-23 15:25:21,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2018-07-23 15:25:21,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2018-07-23 15:25:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2018-07-23 15:25:21,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 373 transitions. [2018-07-23 15:25:21,476 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 373 transitions. Word has length 370 [2018-07-23 15:25:21,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:21,476 INFO L471 AbstractCegarLoop]: Abstraction has 373 states and 373 transitions. [2018-07-23 15:25:21,476 INFO L472 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-07-23 15:25:21,476 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 373 transitions. [2018-07-23 15:25:21,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-07-23 15:25:21,477 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:21,478 INFO L353 BasicCegarLoop]: trace histogram [185, 184, 1, 1, 1] [2018-07-23 15:25:21,478 INFO L414 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:21,478 INFO L82 PathProgramCache]: Analyzing trace with hash 36062071, now seen corresponding path program 184 times [2018-07-23 15:25:21,478 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:22,526 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 15:25:22,526 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:22,527 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [186] total 186 [2018-07-23 15:25:22,527 INFO L450 AbstractCegarLoop]: Interpolant automaton has 187 states [2018-07-23 15:25:22,529 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 187 interpolants. [2018-07-23 15:25:22,531 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17391, Invalid=17391, Unknown=0, NotChecked=0, Total=34782 [2018-07-23 15:25:22,531 INFO L87 Difference]: Start difference. First operand 373 states and 373 transitions. Second operand 187 states. [2018-07-23 15:25:24,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:24,203 INFO L93 Difference]: Finished difference Result 377 states and 377 transitions. [2018-07-23 15:25:24,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2018-07-23 15:25:24,203 INFO L78 Accepts]: Start accepts. Automaton has 187 states. Word has length 372 [2018-07-23 15:25:24,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:24,204 INFO L225 Difference]: With dead ends: 377 [2018-07-23 15:25:24,204 INFO L226 Difference]: Without dead ends: 375 [2018-07-23 15:25:24,206 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17391, Invalid=17391, Unknown=0, NotChecked=0, Total=34782 [2018-07-23 15:25:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-07-23 15:25:24,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2018-07-23 15:25:24,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2018-07-23 15:25:24,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 375 transitions. [2018-07-23 15:25:24,209 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 375 transitions. Word has length 372 [2018-07-23 15:25:24,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:24,209 INFO L471 AbstractCegarLoop]: Abstraction has 375 states and 375 transitions. [2018-07-23 15:25:24,209 INFO L472 AbstractCegarLoop]: Interpolant automaton has 187 states. [2018-07-23 15:25:24,209 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 375 transitions. [2018-07-23 15:25:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2018-07-23 15:25:24,210 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:24,211 INFO L353 BasicCegarLoop]: trace histogram [186, 185, 1, 1, 1] [2018-07-23 15:25:24,211 INFO L414 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:24,211 INFO L82 PathProgramCache]: Analyzing trace with hash 295963953, now seen corresponding path program 185 times [2018-07-23 15:25:24,211 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:25,225 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 15:25:25,226 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:25,226 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [187] total 187 [2018-07-23 15:25:25,226 INFO L450 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-07-23 15:25:25,228 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-07-23 15:25:25,229 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17578, Invalid=17578, Unknown=0, NotChecked=0, Total=35156 [2018-07-23 15:25:25,229 INFO L87 Difference]: Start difference. First operand 375 states and 375 transitions. Second operand 188 states. [2018-07-23 15:25:25,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:25,873 INFO L93 Difference]: Finished difference Result 379 states and 379 transitions. [2018-07-23 15:25:25,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2018-07-23 15:25:25,874 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 374 [2018-07-23 15:25:25,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:25,874 INFO L225 Difference]: With dead ends: 379 [2018-07-23 15:25:25,874 INFO L226 Difference]: Without dead ends: 377 [2018-07-23 15:25:25,875 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 1 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 15:25:25,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2018-07-23 15:25:25,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2018-07-23 15:25:25,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2018-07-23 15:25:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 377 transitions. [2018-07-23 15:25:25,879 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 377 transitions. Word has length 374 [2018-07-23 15:25:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:25,880 INFO L471 AbstractCegarLoop]: Abstraction has 377 states and 377 transitions. [2018-07-23 15:25:25,880 INFO L472 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-07-23 15:25:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 377 transitions. [2018-07-23 15:25:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-07-23 15:25:25,881 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:25,881 INFO L353 BasicCegarLoop]: trace histogram [187, 186, 1, 1, 1] [2018-07-23 15:25:25,881 INFO L414 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:25,881 INFO L82 PathProgramCache]: Analyzing trace with hash 953569387, now seen corresponding path program 186 times [2018-07-23 15:25:25,881 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:26,896 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 15:25:26,896 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:26,897 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [188] total 188 [2018-07-23 15:25:26,897 INFO L450 AbstractCegarLoop]: Interpolant automaton has 189 states [2018-07-23 15:25:26,899 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2018-07-23 15:25:26,901 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17766, Invalid=17766, Unknown=0, NotChecked=0, Total=35532 [2018-07-23 15:25:26,901 INFO L87 Difference]: Start difference. First operand 377 states and 377 transitions. Second operand 189 states. [2018-07-23 15:25:28,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:28,216 INFO L93 Difference]: Finished difference Result 381 states and 381 transitions. [2018-07-23 15:25:28,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2018-07-23 15:25:28,216 INFO L78 Accepts]: Start accepts. Automaton has 189 states. Word has length 376 [2018-07-23 15:25:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:28,217 INFO L225 Difference]: With dead ends: 381 [2018-07-23 15:25:28,217 INFO L226 Difference]: Without dead ends: 379 [2018-07-23 15:25:28,220 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 1 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 15:25:28,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2018-07-23 15:25:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2018-07-23 15:25:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-07-23 15:25:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 379 transitions. [2018-07-23 15:25:28,224 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 379 transitions. Word has length 376 [2018-07-23 15:25:28,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:28,225 INFO L471 AbstractCegarLoop]: Abstraction has 379 states and 379 transitions. [2018-07-23 15:25:28,225 INFO L472 AbstractCegarLoop]: Interpolant automaton has 189 states. [2018-07-23 15:25:28,225 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 379 transitions. [2018-07-23 15:25:28,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-07-23 15:25:28,226 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:28,226 INFO L353 BasicCegarLoop]: trace histogram [188, 187, 1, 1, 1] [2018-07-23 15:25:28,226 INFO L414 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:28,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1552198949, now seen corresponding path program 187 times [2018-07-23 15:25:28,226 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:29,252 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 15:25:29,252 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:29,252 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [189] total 189 [2018-07-23 15:25:29,252 INFO L450 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-07-23 15:25:29,255 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-07-23 15:25:29,256 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17955, Invalid=17955, Unknown=0, NotChecked=0, Total=35910 [2018-07-23 15:25:29,257 INFO L87 Difference]: Start difference. First operand 379 states and 379 transitions. Second operand 190 states. [2018-07-23 15:25:30,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:30,820 INFO L93 Difference]: Finished difference Result 383 states and 383 transitions. [2018-07-23 15:25:30,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2018-07-23 15:25:30,820 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 378 [2018-07-23 15:25:30,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:30,821 INFO L225 Difference]: With dead ends: 383 [2018-07-23 15:25:30,821 INFO L226 Difference]: Without dead ends: 381 [2018-07-23 15:25:30,822 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 1 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 15:25:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2018-07-23 15:25:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2018-07-23 15:25:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2018-07-23 15:25:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 381 transitions. [2018-07-23 15:25:30,825 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 381 transitions. Word has length 378 [2018-07-23 15:25:30,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:30,826 INFO L471 AbstractCegarLoop]: Abstraction has 381 states and 381 transitions. [2018-07-23 15:25:30,826 INFO L472 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-07-23 15:25:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 381 transitions. [2018-07-23 15:25:30,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2018-07-23 15:25:30,827 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:30,827 INFO L353 BasicCegarLoop]: trace histogram [189, 188, 1, 1, 1] [2018-07-23 15:25:30,827 INFO L414 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:30,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1309590367, now seen corresponding path program 188 times [2018-07-23 15:25:30,827 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:31,835 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 15:25:31,835 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:31,836 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [190] total 190 [2018-07-23 15:25:31,836 INFO L450 AbstractCegarLoop]: Interpolant automaton has 191 states [2018-07-23 15:25:31,838 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2018-07-23 15:25:31,840 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18145, Invalid=18145, Unknown=0, NotChecked=0, Total=36290 [2018-07-23 15:25:31,840 INFO L87 Difference]: Start difference. First operand 381 states and 381 transitions. Second operand 191 states. [2018-07-23 15:25:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:32,541 INFO L93 Difference]: Finished difference Result 385 states and 385 transitions. [2018-07-23 15:25:32,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2018-07-23 15:25:32,542 INFO L78 Accepts]: Start accepts. Automaton has 191 states. Word has length 380 [2018-07-23 15:25:32,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:32,542 INFO L225 Difference]: With dead ends: 385 [2018-07-23 15:25:32,542 INFO L226 Difference]: Without dead ends: 383 [2018-07-23 15:25:32,545 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18145, Invalid=18145, Unknown=0, NotChecked=0, Total=36290 [2018-07-23 15:25:32,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-07-23 15:25:32,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-07-23 15:25:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-07-23 15:25:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 383 transitions. [2018-07-23 15:25:32,549 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 383 transitions. Word has length 380 [2018-07-23 15:25:32,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:32,549 INFO L471 AbstractCegarLoop]: Abstraction has 383 states and 383 transitions. [2018-07-23 15:25:32,549 INFO L472 AbstractCegarLoop]: Interpolant automaton has 191 states. [2018-07-23 15:25:32,549 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 383 transitions. [2018-07-23 15:25:32,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2018-07-23 15:25:32,550 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:32,550 INFO L353 BasicCegarLoop]: trace histogram [190, 189, 1, 1, 1] [2018-07-23 15:25:32,550 INFO L414 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:32,551 INFO L82 PathProgramCache]: Analyzing trace with hash 90977049, now seen corresponding path program 189 times [2018-07-23 15:25:32,551 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:33,573 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 15:25:33,574 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:33,574 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [191] total 191 [2018-07-23 15:25:33,574 INFO L450 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-07-23 15:25:33,577 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-07-23 15:25:33,578 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2018-07-23 15:25:33,579 INFO L87 Difference]: Start difference. First operand 383 states and 383 transitions. Second operand 192 states. [2018-07-23 15:25:34,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:34,276 INFO L93 Difference]: Finished difference Result 387 states and 387 transitions. [2018-07-23 15:25:34,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2018-07-23 15:25:34,277 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 382 [2018-07-23 15:25:34,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:34,277 INFO L225 Difference]: With dead ends: 387 [2018-07-23 15:25:34,278 INFO L226 Difference]: Without dead ends: 385 [2018-07-23 15:25:34,280 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2018-07-23 15:25:34,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2018-07-23 15:25:34,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2018-07-23 15:25:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2018-07-23 15:25:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 385 transitions. [2018-07-23 15:25:34,284 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 385 transitions. Word has length 382 [2018-07-23 15:25:34,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:34,284 INFO L471 AbstractCegarLoop]: Abstraction has 385 states and 385 transitions. [2018-07-23 15:25:34,284 INFO L472 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-07-23 15:25:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 385 transitions. [2018-07-23 15:25:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2018-07-23 15:25:34,285 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:34,286 INFO L353 BasicCegarLoop]: trace histogram [191, 190, 1, 1, 1] [2018-07-23 15:25:34,286 INFO L414 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:34,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1529650259, now seen corresponding path program 190 times [2018-07-23 15:25:34,286 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:35,331 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 15:25:35,332 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:35,332 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [192] total 192 [2018-07-23 15:25:35,332 INFO L450 AbstractCegarLoop]: Interpolant automaton has 193 states [2018-07-23 15:25:35,334 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2018-07-23 15:25:35,336 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-07-23 15:25:35,336 INFO L87 Difference]: Start difference. First operand 385 states and 385 transitions. Second operand 193 states. [2018-07-23 15:25:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:36,875 INFO L93 Difference]: Finished difference Result 389 states and 389 transitions. [2018-07-23 15:25:36,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2018-07-23 15:25:36,875 INFO L78 Accepts]: Start accepts. Automaton has 193 states. Word has length 384 [2018-07-23 15:25:36,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:36,876 INFO L225 Difference]: With dead ends: 389 [2018-07-23 15:25:36,876 INFO L226 Difference]: Without dead ends: 387 [2018-07-23 15:25:36,878 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-07-23 15:25:36,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-07-23 15:25:36,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2018-07-23 15:25:36,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2018-07-23 15:25:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2018-07-23 15:25:36,882 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 384 [2018-07-23 15:25:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:36,882 INFO L471 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2018-07-23 15:25:36,882 INFO L472 AbstractCegarLoop]: Interpolant automaton has 193 states. [2018-07-23 15:25:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2018-07-23 15:25:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-07-23 15:25:36,884 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:36,884 INFO L353 BasicCegarLoop]: trace histogram [192, 191, 1, 1, 1] [2018-07-23 15:25:36,884 INFO L414 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:36,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1115135757, now seen corresponding path program 191 times [2018-07-23 15:25:36,885 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:37,920 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 15:25:37,920 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:37,920 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [193] total 193 [2018-07-23 15:25:37,921 INFO L450 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-07-23 15:25:37,924 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-07-23 15:25:37,926 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18721, Invalid=18721, Unknown=0, NotChecked=0, Total=37442 [2018-07-23 15:25:37,926 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand 194 states. [2018-07-23 15:25:39,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:39,794 INFO L93 Difference]: Finished difference Result 391 states and 391 transitions. [2018-07-23 15:25:39,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2018-07-23 15:25:39,794 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 386 [2018-07-23 15:25:39,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:39,795 INFO L225 Difference]: With dead ends: 391 [2018-07-23 15:25:39,795 INFO L226 Difference]: Without dead ends: 389 [2018-07-23 15:25:39,799 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18721, Invalid=18721, Unknown=0, NotChecked=0, Total=37442 [2018-07-23 15:25:39,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2018-07-23 15:25:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2018-07-23 15:25:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2018-07-23 15:25:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 389 transitions. [2018-07-23 15:25:39,804 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 389 transitions. Word has length 386 [2018-07-23 15:25:39,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:39,804 INFO L471 AbstractCegarLoop]: Abstraction has 389 states and 389 transitions. [2018-07-23 15:25:39,804 INFO L472 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-07-23 15:25:39,804 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 389 transitions. [2018-07-23 15:25:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-07-23 15:25:39,806 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:39,806 INFO L353 BasicCegarLoop]: trace histogram [193, 192, 1, 1, 1] [2018-07-23 15:25:39,806 INFO L414 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:39,807 INFO L82 PathProgramCache]: Analyzing trace with hash -2096309433, now seen corresponding path program 192 times [2018-07-23 15:25:39,807 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:40,884 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 15:25:40,884 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:40,885 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [194] total 194 [2018-07-23 15:25:40,885 INFO L450 AbstractCegarLoop]: Interpolant automaton has 195 states [2018-07-23 15:25:40,887 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2018-07-23 15:25:40,889 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18915, Invalid=18915, Unknown=0, NotChecked=0, Total=37830 [2018-07-23 15:25:40,889 INFO L87 Difference]: Start difference. First operand 389 states and 389 transitions. Second operand 195 states. [2018-07-23 15:25:42,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:42,527 INFO L93 Difference]: Finished difference Result 393 states and 393 transitions. [2018-07-23 15:25:42,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2018-07-23 15:25:42,528 INFO L78 Accepts]: Start accepts. Automaton has 195 states. Word has length 388 [2018-07-23 15:25:42,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:42,528 INFO L225 Difference]: With dead ends: 393 [2018-07-23 15:25:42,528 INFO L226 Difference]: Without dead ends: 391 [2018-07-23 15:25:42,530 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18915, Invalid=18915, Unknown=0, NotChecked=0, Total=37830 [2018-07-23 15:25:42,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2018-07-23 15:25:42,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2018-07-23 15:25:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2018-07-23 15:25:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 391 transitions. [2018-07-23 15:25:42,534 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 391 transitions. Word has length 388 [2018-07-23 15:25:42,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:42,534 INFO L471 AbstractCegarLoop]: Abstraction has 391 states and 391 transitions. [2018-07-23 15:25:42,535 INFO L472 AbstractCegarLoop]: Interpolant automaton has 195 states. [2018-07-23 15:25:42,535 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 391 transitions. [2018-07-23 15:25:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2018-07-23 15:25:42,536 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:42,536 INFO L353 BasicCegarLoop]: trace histogram [194, 193, 1, 1, 1] [2018-07-23 15:25:42,536 INFO L414 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:42,536 INFO L82 PathProgramCache]: Analyzing trace with hash -213651199, now seen corresponding path program 193 times [2018-07-23 15:25:42,536 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:43,586 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 15:25:43,586 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:43,586 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [195] total 195 [2018-07-23 15:25:43,587 INFO L450 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-07-23 15:25:43,590 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-07-23 15:25:43,591 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19110, Invalid=19110, Unknown=0, NotChecked=0, Total=38220 [2018-07-23 15:25:43,591 INFO L87 Difference]: Start difference. First operand 391 states and 391 transitions. Second operand 196 states. [2018-07-23 15:25:44,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:44,793 INFO L93 Difference]: Finished difference Result 395 states and 395 transitions. [2018-07-23 15:25:44,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2018-07-23 15:25:44,793 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 390 [2018-07-23 15:25:44,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:44,794 INFO L225 Difference]: With dead ends: 395 [2018-07-23 15:25:44,794 INFO L226 Difference]: Without dead ends: 393 [2018-07-23 15:25:44,796 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19110, Invalid=19110, Unknown=0, NotChecked=0, Total=38220 [2018-07-23 15:25:44,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-07-23 15:25:44,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2018-07-23 15:25:44,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-07-23 15:25:44,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 393 transitions. [2018-07-23 15:25:44,800 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 393 transitions. Word has length 390 [2018-07-23 15:25:44,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:44,800 INFO L471 AbstractCegarLoop]: Abstraction has 393 states and 393 transitions. [2018-07-23 15:25:44,800 INFO L472 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-07-23 15:25:44,800 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 393 transitions. [2018-07-23 15:25:44,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2018-07-23 15:25:44,802 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:44,802 INFO L353 BasicCegarLoop]: trace histogram [195, 194, 1, 1, 1] [2018-07-23 15:25:44,802 INFO L414 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:44,802 INFO L82 PathProgramCache]: Analyzing trace with hash 839680059, now seen corresponding path program 194 times [2018-07-23 15:25:44,802 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:45,909 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 15:25:45,909 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:45,909 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [196] total 196 [2018-07-23 15:25:45,910 INFO L450 AbstractCegarLoop]: Interpolant automaton has 197 states [2018-07-23 15:25:45,912 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2018-07-23 15:25:45,913 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2018-07-23 15:25:45,913 INFO L87 Difference]: Start difference. First operand 393 states and 393 transitions. Second operand 197 states. [2018-07-23 15:25:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:46,791 INFO L93 Difference]: Finished difference Result 397 states and 397 transitions. [2018-07-23 15:25:46,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2018-07-23 15:25:46,791 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 392 [2018-07-23 15:25:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:46,792 INFO L225 Difference]: With dead ends: 397 [2018-07-23 15:25:46,792 INFO L226 Difference]: Without dead ends: 395 [2018-07-23 15:25:46,794 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2018-07-23 15:25:46,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2018-07-23 15:25:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2018-07-23 15:25:46,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2018-07-23 15:25:46,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 395 transitions. [2018-07-23 15:25:46,797 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 395 transitions. Word has length 392 [2018-07-23 15:25:46,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:46,798 INFO L471 AbstractCegarLoop]: Abstraction has 395 states and 395 transitions. [2018-07-23 15:25:46,798 INFO L472 AbstractCegarLoop]: Interpolant automaton has 197 states. [2018-07-23 15:25:46,798 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 395 transitions. [2018-07-23 15:25:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-07-23 15:25:46,799 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:46,799 INFO L353 BasicCegarLoop]: trace histogram [196, 195, 1, 1, 1] [2018-07-23 15:25:46,799 INFO L414 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:46,799 INFO L82 PathProgramCache]: Analyzing trace with hash -521262859, now seen corresponding path program 195 times [2018-07-23 15:25:46,799 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:47,861 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 15:25:47,861 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:47,862 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [197] total 197 [2018-07-23 15:25:47,862 INFO L450 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-07-23 15:25:47,865 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-07-23 15:25:47,867 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19503, Invalid=19503, Unknown=0, NotChecked=0, Total=39006 [2018-07-23 15:25:47,867 INFO L87 Difference]: Start difference. First operand 395 states and 395 transitions. Second operand 198 states. [2018-07-23 15:25:48,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:48,574 INFO L93 Difference]: Finished difference Result 399 states and 399 transitions. [2018-07-23 15:25:48,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2018-07-23 15:25:48,574 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 394 [2018-07-23 15:25:48,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:48,575 INFO L225 Difference]: With dead ends: 399 [2018-07-23 15:25:48,575 INFO L226 Difference]: Without dead ends: 397 [2018-07-23 15:25:48,578 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19503, Invalid=19503, Unknown=0, NotChecked=0, Total=39006 [2018-07-23 15:25:48,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2018-07-23 15:25:48,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2018-07-23 15:25:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2018-07-23 15:25:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 397 transitions. [2018-07-23 15:25:48,581 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 397 transitions. Word has length 394 [2018-07-23 15:25:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:48,582 INFO L471 AbstractCegarLoop]: Abstraction has 397 states and 397 transitions. [2018-07-23 15:25:48,582 INFO L472 AbstractCegarLoop]: Interpolant automaton has 198 states. [2018-07-23 15:25:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 397 transitions. [2018-07-23 15:25:48,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2018-07-23 15:25:48,583 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:48,583 INFO L353 BasicCegarLoop]: trace histogram [197, 196, 1, 1, 1] [2018-07-23 15:25:48,583 INFO L414 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:48,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1577618223, now seen corresponding path program 196 times [2018-07-23 15:25:48,583 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:49,686 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 15:25:49,686 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:49,686 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [198] total 198 [2018-07-23 15:25:49,687 INFO L450 AbstractCegarLoop]: Interpolant automaton has 199 states [2018-07-23 15:25:49,688 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2018-07-23 15:25:49,689 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2018-07-23 15:25:49,690 INFO L87 Difference]: Start difference. First operand 397 states and 397 transitions. Second operand 199 states. [2018-07-23 15:25:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:50,550 INFO L93 Difference]: Finished difference Result 401 states and 401 transitions. [2018-07-23 15:25:50,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2018-07-23 15:25:50,550 INFO L78 Accepts]: Start accepts. Automaton has 199 states. Word has length 396 [2018-07-23 15:25:50,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:50,551 INFO L225 Difference]: With dead ends: 401 [2018-07-23 15:25:50,551 INFO L226 Difference]: Without dead ends: 399 [2018-07-23 15:25:50,553 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2018-07-23 15:25:50,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-07-23 15:25:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2018-07-23 15:25:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2018-07-23 15:25:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 399 transitions. [2018-07-23 15:25:50,558 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 399 transitions. Word has length 396 [2018-07-23 15:25:50,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:50,559 INFO L471 AbstractCegarLoop]: Abstraction has 399 states and 399 transitions. [2018-07-23 15:25:50,559 INFO L472 AbstractCegarLoop]: Interpolant automaton has 199 states. [2018-07-23 15:25:50,559 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 399 transitions. [2018-07-23 15:25:50,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-07-23 15:25:50,561 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:50,561 INFO L353 BasicCegarLoop]: trace histogram [198, 197, 1, 1, 1] [2018-07-23 15:25:50,561 INFO L414 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:50,561 INFO L82 PathProgramCache]: Analyzing trace with hash -32291095, now seen corresponding path program 197 times [2018-07-23 15:25:50,561 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:51,670 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 15:25:51,670 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:51,670 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [199] total 199 [2018-07-23 15:25:51,670 INFO L450 AbstractCegarLoop]: Interpolant automaton has 200 states [2018-07-23 15:25:51,673 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2018-07-23 15:25:51,675 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19900, Invalid=19900, Unknown=0, NotChecked=0, Total=39800 [2018-07-23 15:25:51,675 INFO L87 Difference]: Start difference. First operand 399 states and 399 transitions. Second operand 200 states. [2018-07-23 15:25:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:52,489 INFO L93 Difference]: Finished difference Result 403 states and 403 transitions. [2018-07-23 15:25:52,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2018-07-23 15:25:52,489 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 398 [2018-07-23 15:25:52,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:52,490 INFO L225 Difference]: With dead ends: 403 [2018-07-23 15:25:52,490 INFO L226 Difference]: Without dead ends: 401 [2018-07-23 15:25:52,492 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=19900, Invalid=19900, Unknown=0, NotChecked=0, Total=39800 [2018-07-23 15:25:52,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2018-07-23 15:25:52,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2018-07-23 15:25:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2018-07-23 15:25:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 401 transitions. [2018-07-23 15:25:52,496 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 401 transitions. Word has length 398 [2018-07-23 15:25:52,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:52,496 INFO L471 AbstractCegarLoop]: Abstraction has 401 states and 401 transitions. [2018-07-23 15:25:52,497 INFO L472 AbstractCegarLoop]: Interpolant automaton has 200 states. [2018-07-23 15:25:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 401 transitions. [2018-07-23 15:25:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2018-07-23 15:25:52,498 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:52,498 INFO L353 BasicCegarLoop]: trace histogram [199, 198, 1, 1, 1] [2018-07-23 15:25:52,498 INFO L414 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:52,498 INFO L82 PathProgramCache]: Analyzing trace with hash -966919133, now seen corresponding path program 198 times [2018-07-23 15:25:52,498 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:53,652 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 15:25:53,653 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:53,653 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [200] total 200 [2018-07-23 15:25:53,653 INFO L450 AbstractCegarLoop]: Interpolant automaton has 201 states [2018-07-23 15:25:53,655 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2018-07-23 15:25:53,656 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20100, Invalid=20100, Unknown=0, NotChecked=0, Total=40200 [2018-07-23 15:25:53,656 INFO L87 Difference]: Start difference. First operand 401 states and 401 transitions. Second operand 201 states. [2018-07-23 15:25:54,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:54,812 INFO L93 Difference]: Finished difference Result 405 states and 405 transitions. [2018-07-23 15:25:54,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2018-07-23 15:25:54,813 INFO L78 Accepts]: Start accepts. Automaton has 201 states. Word has length 400 [2018-07-23 15:25:54,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:54,813 INFO L225 Difference]: With dead ends: 405 [2018-07-23 15:25:54,813 INFO L226 Difference]: Without dead ends: 403 [2018-07-23 15:25:54,815 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 1 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 15:25:54,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2018-07-23 15:25:54,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2018-07-23 15:25:54,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-07-23 15:25:54,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 403 transitions. [2018-07-23 15:25:54,819 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 403 transitions. Word has length 400 [2018-07-23 15:25:54,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:54,819 INFO L471 AbstractCegarLoop]: Abstraction has 403 states and 403 transitions. [2018-07-23 15:25:54,819 INFO L472 AbstractCegarLoop]: Interpolant automaton has 201 states. [2018-07-23 15:25:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 403 transitions. [2018-07-23 15:25:54,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-07-23 15:25:54,820 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:54,820 INFO L353 BasicCegarLoop]: trace histogram [200, 199, 1, 1, 1] [2018-07-23 15:25:54,820 INFO L414 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:54,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1496298787, now seen corresponding path program 199 times [2018-07-23 15:25:54,821 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:56,017 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 15:25:56,018 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:56,018 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [201] total 201 [2018-07-23 15:25:56,018 INFO L450 AbstractCegarLoop]: Interpolant automaton has 202 states [2018-07-23 15:25:56,021 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2018-07-23 15:25:56,023 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20301, Invalid=20301, Unknown=0, NotChecked=0, Total=40602 [2018-07-23 15:25:56,023 INFO L87 Difference]: Start difference. First operand 403 states and 403 transitions. Second operand 202 states. [2018-07-23 15:25:57,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:57,651 INFO L93 Difference]: Finished difference Result 407 states and 407 transitions. [2018-07-23 15:25:57,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2018-07-23 15:25:57,651 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 402 [2018-07-23 15:25:57,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:57,652 INFO L225 Difference]: With dead ends: 407 [2018-07-23 15:25:57,652 INFO L226 Difference]: Without dead ends: 405 [2018-07-23 15:25:57,654 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=20301, Invalid=20301, Unknown=0, NotChecked=0, Total=40602 [2018-07-23 15:25:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2018-07-23 15:25:57,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 405. [2018-07-23 15:25:57,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2018-07-23 15:25:57,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 405 transitions. [2018-07-23 15:25:57,658 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 405 transitions. Word has length 402 [2018-07-23 15:25:57,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:57,658 INFO L471 AbstractCegarLoop]: Abstraction has 405 states and 405 transitions. [2018-07-23 15:25:57,658 INFO L472 AbstractCegarLoop]: Interpolant automaton has 202 states. [2018-07-23 15:25:57,658 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 405 transitions. [2018-07-23 15:25:57,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2018-07-23 15:25:57,660 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:57,660 INFO L353 BasicCegarLoop]: trace histogram [201, 200, 1, 1, 1] [2018-07-23 15:25:57,660 INFO L414 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:57,660 INFO L82 PathProgramCache]: Analyzing trace with hash 870961943, now seen corresponding path program 200 times [2018-07-23 15:25:57,660 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:58,826 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 15:25:58,827 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:58,827 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [202] total 202 [2018-07-23 15:25:58,827 INFO L450 AbstractCegarLoop]: Interpolant automaton has 203 states [2018-07-23 15:25:58,829 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2018-07-23 15:25:58,830 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2018-07-23 15:25:58,830 INFO L87 Difference]: Start difference. First operand 405 states and 405 transitions. Second operand 203 states. [2018-07-23 15:26:00,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:00,955 INFO L93 Difference]: Finished difference Result 409 states and 409 transitions. [2018-07-23 15:26:00,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2018-07-23 15:26:00,955 INFO L78 Accepts]: Start accepts. Automaton has 203 states. Word has length 404 [2018-07-23 15:26:00,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:00,956 INFO L225 Difference]: With dead ends: 409 [2018-07-23 15:26:00,956 INFO L226 Difference]: Without dead ends: 407 [2018-07-23 15:26:00,958 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2018-07-23 15:26:00,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2018-07-23 15:26:00,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2018-07-23 15:26:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-07-23 15:26:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 407 transitions. [2018-07-23 15:26:00,961 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 407 transitions. Word has length 404 [2018-07-23 15:26:00,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:00,962 INFO L471 AbstractCegarLoop]: Abstraction has 407 states and 407 transitions. [2018-07-23 15:26:00,962 INFO L472 AbstractCegarLoop]: Interpolant automaton has 203 states. [2018-07-23 15:26:00,962 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 407 transitions. [2018-07-23 15:26:00,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-07-23 15:26:00,964 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:00,964 INFO L353 BasicCegarLoop]: trace histogram [202, 201, 1, 1, 1] [2018-07-23 15:26:00,964 INFO L414 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:00,964 INFO L82 PathProgramCache]: Analyzing trace with hash -524143407, now seen corresponding path program 201 times [2018-07-23 15:26:00,964 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:02,111 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 15:26:02,111 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:02,111 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [203] total 203 [2018-07-23 15:26:02,112 INFO L450 AbstractCegarLoop]: Interpolant automaton has 204 states [2018-07-23 15:26:02,115 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2018-07-23 15:26:02,117 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20706, Invalid=20706, Unknown=0, NotChecked=0, Total=41412 [2018-07-23 15:26:02,118 INFO L87 Difference]: Start difference. First operand 407 states and 407 transitions. Second operand 204 states. [2018-07-23 15:26:04,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:04,215 INFO L93 Difference]: Finished difference Result 411 states and 411 transitions. [2018-07-23 15:26:04,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2018-07-23 15:26:04,215 INFO L78 Accepts]: Start accepts. Automaton has 204 states. Word has length 406 [2018-07-23 15:26:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:04,216 INFO L225 Difference]: With dead ends: 411 [2018-07-23 15:26:04,216 INFO L226 Difference]: Without dead ends: 409 [2018-07-23 15:26:04,219 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 1 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 15:26:04,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2018-07-23 15:26:04,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 409. [2018-07-23 15:26:04,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2018-07-23 15:26:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 409 transitions. [2018-07-23 15:26:04,223 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 409 transitions. Word has length 406 [2018-07-23 15:26:04,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:04,223 INFO L471 AbstractCegarLoop]: Abstraction has 409 states and 409 transitions. [2018-07-23 15:26:04,223 INFO L472 AbstractCegarLoop]: Interpolant automaton has 204 states. [2018-07-23 15:26:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 409 transitions. [2018-07-23 15:26:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-07-23 15:26:04,224 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:04,224 INFO L353 BasicCegarLoop]: trace histogram [203, 202, 1, 1, 1] [2018-07-23 15:26:04,224 INFO L414 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:04,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1190588405, now seen corresponding path program 202 times [2018-07-23 15:26:04,225 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:05,476 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 15:26:05,476 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:05,476 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [204] total 204 [2018-07-23 15:26:05,477 INFO L450 AbstractCegarLoop]: Interpolant automaton has 205 states [2018-07-23 15:26:05,479 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2018-07-23 15:26:05,480 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20910, Invalid=20910, Unknown=0, NotChecked=0, Total=41820 [2018-07-23 15:26:05,480 INFO L87 Difference]: Start difference. First operand 409 states and 409 transitions. Second operand 205 states. [2018-07-23 15:26:06,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:06,418 INFO L93 Difference]: Finished difference Result 413 states and 413 transitions. [2018-07-23 15:26:06,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2018-07-23 15:26:06,418 INFO L78 Accepts]: Start accepts. Automaton has 205 states. Word has length 408 [2018-07-23 15:26:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:06,418 INFO L225 Difference]: With dead ends: 413 [2018-07-23 15:26:06,419 INFO L226 Difference]: Without dead ends: 411 [2018-07-23 15:26:06,420 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 1 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 15:26:06,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-07-23 15:26:06,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2018-07-23 15:26:06,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2018-07-23 15:26:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 411 transitions. [2018-07-23 15:26:06,424 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 411 transitions. Word has length 408 [2018-07-23 15:26:06,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:06,424 INFO L471 AbstractCegarLoop]: Abstraction has 411 states and 411 transitions. [2018-07-23 15:26:06,424 INFO L472 AbstractCegarLoop]: Interpolant automaton has 205 states. [2018-07-23 15:26:06,424 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 411 transitions. [2018-07-23 15:26:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2018-07-23 15:26:06,425 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:06,426 INFO L353 BasicCegarLoop]: trace histogram [204, 203, 1, 1, 1] [2018-07-23 15:26:06,426 INFO L414 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:06,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1694104379, now seen corresponding path program 203 times [2018-07-23 15:26:06,426 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:07,631 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 15:26:07,632 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:07,632 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [205] total 205 [2018-07-23 15:26:07,633 INFO L450 AbstractCegarLoop]: Interpolant automaton has 206 states [2018-07-23 15:26:07,636 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2018-07-23 15:26:07,638 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21115, Invalid=21115, Unknown=0, NotChecked=0, Total=42230 [2018-07-23 15:26:07,638 INFO L87 Difference]: Start difference. First operand 411 states and 411 transitions. Second operand 206 states. [2018-07-23 15:26:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:08,539 INFO L93 Difference]: Finished difference Result 415 states and 415 transitions. [2018-07-23 15:26:08,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2018-07-23 15:26:08,539 INFO L78 Accepts]: Start accepts. Automaton has 206 states. Word has length 410 [2018-07-23 15:26:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:08,540 INFO L225 Difference]: With dead ends: 415 [2018-07-23 15:26:08,540 INFO L226 Difference]: Without dead ends: 413 [2018-07-23 15:26:08,542 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 1 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 15:26:08,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2018-07-23 15:26:08,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2018-07-23 15:26:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2018-07-23 15:26:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 413 transitions. [2018-07-23 15:26:08,546 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 413 transitions. Word has length 410 [2018-07-23 15:26:08,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:08,547 INFO L471 AbstractCegarLoop]: Abstraction has 413 states and 413 transitions. [2018-07-23 15:26:08,547 INFO L472 AbstractCegarLoop]: Interpolant automaton has 206 states. [2018-07-23 15:26:08,547 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 413 transitions. [2018-07-23 15:26:08,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-07-23 15:26:08,548 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:08,548 INFO L353 BasicCegarLoop]: trace histogram [205, 204, 1, 1, 1] [2018-07-23 15:26:08,548 INFO L414 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:08,548 INFO L82 PathProgramCache]: Analyzing trace with hash -241650945, now seen corresponding path program 204 times [2018-07-23 15:26:08,548 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:09,736 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 15:26:09,736 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:09,736 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [206] total 206 [2018-07-23 15:26:09,737 INFO L450 AbstractCegarLoop]: Interpolant automaton has 207 states [2018-07-23 15:26:09,739 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2018-07-23 15:26:09,741 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21321, Invalid=21321, Unknown=0, NotChecked=0, Total=42642 [2018-07-23 15:26:09,741 INFO L87 Difference]: Start difference. First operand 413 states and 413 transitions. Second operand 207 states. [2018-07-23 15:26:11,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:11,556 INFO L93 Difference]: Finished difference Result 417 states and 417 transitions. [2018-07-23 15:26:11,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2018-07-23 15:26:11,556 INFO L78 Accepts]: Start accepts. Automaton has 207 states. Word has length 412 [2018-07-23 15:26:11,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:11,557 INFO L225 Difference]: With dead ends: 417 [2018-07-23 15:26:11,557 INFO L226 Difference]: Without dead ends: 415 [2018-07-23 15:26:11,559 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=21321, Invalid=21321, Unknown=0, NotChecked=0, Total=42642 [2018-07-23 15:26:11,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-07-23 15:26:11,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-07-23 15:26:11,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-07-23 15:26:11,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 415 transitions. [2018-07-23 15:26:11,565 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 415 transitions. Word has length 412 [2018-07-23 15:26:11,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:11,565 INFO L471 AbstractCegarLoop]: Abstraction has 415 states and 415 transitions. [2018-07-23 15:26:11,565 INFO L472 AbstractCegarLoop]: Interpolant automaton has 207 states. [2018-07-23 15:26:11,565 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 415 transitions. [2018-07-23 15:26:11,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2018-07-23 15:26:11,566 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:11,567 INFO L353 BasicCegarLoop]: trace histogram [206, 205, 1, 1, 1] [2018-07-23 15:26:11,567 INFO L414 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:11,567 INFO L82 PathProgramCache]: Analyzing trace with hash -298272071, now seen corresponding path program 205 times [2018-07-23 15:26:11,567 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:12,893 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 15:26:12,894 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:12,894 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [207] total 207 [2018-07-23 15:26:12,894 INFO L450 AbstractCegarLoop]: Interpolant automaton has 208 states [2018-07-23 15:26:12,898 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2018-07-23 15:26:12,899 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21528, Invalid=21528, Unknown=0, NotChecked=0, Total=43056 [2018-07-23 15:26:12,900 INFO L87 Difference]: Start difference. First operand 415 states and 415 transitions. Second operand 208 states. [2018-07-23 15:26:15,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:15,092 INFO L93 Difference]: Finished difference Result 419 states and 419 transitions. [2018-07-23 15:26:15,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2018-07-23 15:26:15,092 INFO L78 Accepts]: Start accepts. Automaton has 208 states. Word has length 414 [2018-07-23 15:26:15,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:15,093 INFO L225 Difference]: With dead ends: 419 [2018-07-23 15:26:15,093 INFO L226 Difference]: Without dead ends: 417 [2018-07-23 15:26:15,096 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 1 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 15:26:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2018-07-23 15:26:15,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 417. [2018-07-23 15:26:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2018-07-23 15:26:15,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 417 transitions. [2018-07-23 15:26:15,102 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 417 transitions. Word has length 414 [2018-07-23 15:26:15,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:15,102 INFO L471 AbstractCegarLoop]: Abstraction has 417 states and 417 transitions. [2018-07-23 15:26:15,102 INFO L472 AbstractCegarLoop]: Interpolant automaton has 208 states. [2018-07-23 15:26:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 417 transitions. [2018-07-23 15:26:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2018-07-23 15:26:15,103 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:15,103 INFO L353 BasicCegarLoop]: trace histogram [207, 206, 1, 1, 1] [2018-07-23 15:26:15,103 INFO L414 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:15,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1123400691, now seen corresponding path program 206 times [2018-07-23 15:26:15,104 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:16,352 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 15:26:16,352 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:16,352 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [208] total 208 [2018-07-23 15:26:16,352 INFO L450 AbstractCegarLoop]: Interpolant automaton has 209 states [2018-07-23 15:26:16,355 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2018-07-23 15:26:16,357 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2018-07-23 15:26:16,357 INFO L87 Difference]: Start difference. First operand 417 states and 417 transitions. Second operand 209 states. [2018-07-23 15:26:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:17,354 INFO L93 Difference]: Finished difference Result 421 states and 421 transitions. [2018-07-23 15:26:17,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2018-07-23 15:26:17,355 INFO L78 Accepts]: Start accepts. Automaton has 209 states. Word has length 416 [2018-07-23 15:26:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:17,355 INFO L225 Difference]: With dead ends: 421 [2018-07-23 15:26:17,355 INFO L226 Difference]: Without dead ends: 419 [2018-07-23 15:26:17,359 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2018-07-23 15:26:17,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2018-07-23 15:26:17,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 419. [2018-07-23 15:26:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2018-07-23 15:26:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 419 transitions. [2018-07-23 15:26:17,363 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 419 transitions. Word has length 416 [2018-07-23 15:26:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:17,363 INFO L471 AbstractCegarLoop]: Abstraction has 419 states and 419 transitions. [2018-07-23 15:26:17,363 INFO L472 AbstractCegarLoop]: Interpolant automaton has 209 states. [2018-07-23 15:26:17,363 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 419 transitions. [2018-07-23 15:26:17,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-07-23 15:26:17,364 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:17,365 INFO L353 BasicCegarLoop]: trace histogram [208, 207, 1, 1, 1] [2018-07-23 15:26:17,365 INFO L414 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:17,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1551324845, now seen corresponding path program 207 times [2018-07-23 15:26:17,365 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:18,656 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 15:26:18,656 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:18,656 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [209] total 209 [2018-07-23 15:26:18,657 INFO L450 AbstractCegarLoop]: Interpolant automaton has 210 states [2018-07-23 15:26:18,660 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2018-07-23 15:26:18,662 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21945, Invalid=21945, Unknown=0, NotChecked=0, Total=43890 [2018-07-23 15:26:18,662 INFO L87 Difference]: Start difference. First operand 419 states and 419 transitions. Second operand 210 states. [2018-07-23 15:26:20,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:20,848 INFO L93 Difference]: Finished difference Result 423 states and 423 transitions. [2018-07-23 15:26:20,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2018-07-23 15:26:20,848 INFO L78 Accepts]: Start accepts. Automaton has 210 states. Word has length 418 [2018-07-23 15:26:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:20,849 INFO L225 Difference]: With dead ends: 423 [2018-07-23 15:26:20,849 INFO L226 Difference]: Without dead ends: 421 [2018-07-23 15:26:20,853 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=21945, Invalid=21945, Unknown=0, NotChecked=0, Total=43890 [2018-07-23 15:26:20,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2018-07-23 15:26:20,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2018-07-23 15:26:20,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2018-07-23 15:26:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 421 transitions. [2018-07-23 15:26:20,858 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 421 transitions. Word has length 418 [2018-07-23 15:26:20,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:20,858 INFO L471 AbstractCegarLoop]: Abstraction has 421 states and 421 transitions. [2018-07-23 15:26:20,858 INFO L472 AbstractCegarLoop]: Interpolant automaton has 210 states. [2018-07-23 15:26:20,858 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 421 transitions. [2018-07-23 15:26:20,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2018-07-23 15:26:20,859 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:20,859 INFO L353 BasicCegarLoop]: trace histogram [209, 208, 1, 1, 1] [2018-07-23 15:26:20,859 INFO L414 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:20,859 INFO L82 PathProgramCache]: Analyzing trace with hash 469576423, now seen corresponding path program 208 times [2018-07-23 15:26:20,860 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:22,142 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 15:26:22,142 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:22,142 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [210] total 210 [2018-07-23 15:26:22,143 INFO L450 AbstractCegarLoop]: Interpolant automaton has 211 states [2018-07-23 15:26:22,146 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2018-07-23 15:26:22,148 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2018-07-23 15:26:22,148 INFO L87 Difference]: Start difference. First operand 421 states and 421 transitions. Second operand 211 states. [2018-07-23 15:26:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:23,351 INFO L93 Difference]: Finished difference Result 425 states and 425 transitions. [2018-07-23 15:26:23,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2018-07-23 15:26:23,351 INFO L78 Accepts]: Start accepts. Automaton has 211 states. Word has length 420 [2018-07-23 15:26:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:23,352 INFO L225 Difference]: With dead ends: 425 [2018-07-23 15:26:23,352 INFO L226 Difference]: Without dead ends: 423 [2018-07-23 15:26:23,354 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2018-07-23 15:26:23,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-07-23 15:26:23,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2018-07-23 15:26:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2018-07-23 15:26:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 423 transitions. [2018-07-23 15:26:23,359 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 423 transitions. Word has length 420 [2018-07-23 15:26:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:23,359 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 423 transitions. [2018-07-23 15:26:23,359 INFO L472 AbstractCegarLoop]: Interpolant automaton has 211 states. [2018-07-23 15:26:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 423 transitions. [2018-07-23 15:26:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-07-23 15:26:23,360 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:23,360 INFO L353 BasicCegarLoop]: trace histogram [210, 209, 1, 1, 1] [2018-07-23 15:26:23,360 INFO L414 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:23,360 INFO L82 PathProgramCache]: Analyzing trace with hash 291428513, now seen corresponding path program 209 times [2018-07-23 15:26:23,361 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:24,696 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 15:26:24,696 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:24,696 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [211] total 211 [2018-07-23 15:26:24,697 INFO L450 AbstractCegarLoop]: Interpolant automaton has 212 states [2018-07-23 15:26:24,698 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2018-07-23 15:26:24,699 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22366, Invalid=22366, Unknown=0, NotChecked=0, Total=44732 [2018-07-23 15:26:24,699 INFO L87 Difference]: Start difference. First operand 423 states and 423 transitions. Second operand 212 states. [2018-07-23 15:26:26,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:26,300 INFO L93 Difference]: Finished difference Result 427 states and 427 transitions. [2018-07-23 15:26:26,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2018-07-23 15:26:26,301 INFO L78 Accepts]: Start accepts. Automaton has 212 states. Word has length 422 [2018-07-23 15:26:26,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:26,301 INFO L225 Difference]: With dead ends: 427 [2018-07-23 15:26:26,301 INFO L226 Difference]: Without dead ends: 425 [2018-07-23 15:26:26,303 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 1 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 15:26:26,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2018-07-23 15:26:26,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2018-07-23 15:26:26,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2018-07-23 15:26:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 425 transitions. [2018-07-23 15:26:26,307 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 425 transitions. Word has length 422 [2018-07-23 15:26:26,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:26,307 INFO L471 AbstractCegarLoop]: Abstraction has 425 states and 425 transitions. [2018-07-23 15:26:26,307 INFO L472 AbstractCegarLoop]: Interpolant automaton has 212 states. [2018-07-23 15:26:26,308 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 425 transitions. [2018-07-23 15:26:26,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2018-07-23 15:26:26,309 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:26,309 INFO L353 BasicCegarLoop]: trace histogram [211, 210, 1, 1, 1] [2018-07-23 15:26:26,309 INFO L414 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:26,309 INFO L82 PathProgramCache]: Analyzing trace with hash 889978843, now seen corresponding path program 210 times [2018-07-23 15:26:26,309 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:27,707 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 15:26:27,707 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:27,708 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [212] total 212 [2018-07-23 15:26:27,708 INFO L450 AbstractCegarLoop]: Interpolant automaton has 213 states [2018-07-23 15:26:27,711 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2018-07-23 15:26:27,713 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2018-07-23 15:26:27,714 INFO L87 Difference]: Start difference. First operand 425 states and 425 transitions. Second operand 213 states. [2018-07-23 15:26:29,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:29,959 INFO L93 Difference]: Finished difference Result 429 states and 429 transitions. [2018-07-23 15:26:29,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2018-07-23 15:26:29,960 INFO L78 Accepts]: Start accepts. Automaton has 213 states. Word has length 424 [2018-07-23 15:26:29,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:29,960 INFO L225 Difference]: With dead ends: 429 [2018-07-23 15:26:29,960 INFO L226 Difference]: Without dead ends: 427 [2018-07-23 15:26:29,964 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2018-07-23 15:26:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-07-23 15:26:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2018-07-23 15:26:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2018-07-23 15:26:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 427 transitions. [2018-07-23 15:26:29,968 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 427 transitions. Word has length 424 [2018-07-23 15:26:29,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:29,968 INFO L471 AbstractCegarLoop]: Abstraction has 427 states and 427 transitions. [2018-07-23 15:26:29,968 INFO L472 AbstractCegarLoop]: Interpolant automaton has 213 states. [2018-07-23 15:26:29,968 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 427 transitions. [2018-07-23 15:26:29,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2018-07-23 15:26:29,969 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:29,970 INFO L353 BasicCegarLoop]: trace histogram [212, 211, 1, 1, 1] [2018-07-23 15:26:29,970 INFO L414 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:29,970 INFO L82 PathProgramCache]: Analyzing trace with hash 571228309, now seen corresponding path program 211 times [2018-07-23 15:26:29,970 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:31,285 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 15:26:31,286 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:31,286 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [213] total 213 [2018-07-23 15:26:31,286 INFO L450 AbstractCegarLoop]: Interpolant automaton has 214 states [2018-07-23 15:26:31,288 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2018-07-23 15:26:31,289 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22791, Invalid=22791, Unknown=0, NotChecked=0, Total=45582 [2018-07-23 15:26:31,289 INFO L87 Difference]: Start difference. First operand 427 states and 427 transitions. Second operand 214 states. [2018-07-23 15:26:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:32,772 INFO L93 Difference]: Finished difference Result 431 states and 431 transitions. [2018-07-23 15:26:32,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2018-07-23 15:26:32,772 INFO L78 Accepts]: Start accepts. Automaton has 214 states. Word has length 426 [2018-07-23 15:26:32,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:32,773 INFO L225 Difference]: With dead ends: 431 [2018-07-23 15:26:32,773 INFO L226 Difference]: Without dead ends: 429 [2018-07-23 15:26:32,775 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22791, Invalid=22791, Unknown=0, NotChecked=0, Total=45582 [2018-07-23 15:26:32,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2018-07-23 15:26:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2018-07-23 15:26:32,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2018-07-23 15:26:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 429 transitions. [2018-07-23 15:26:32,779 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 429 transitions. Word has length 426 [2018-07-23 15:26:32,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:32,779 INFO L471 AbstractCegarLoop]: Abstraction has 429 states and 429 transitions. [2018-07-23 15:26:32,779 INFO L472 AbstractCegarLoop]: Interpolant automaton has 214 states. [2018-07-23 15:26:32,779 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 429 transitions. [2018-07-23 15:26:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2018-07-23 15:26:32,780 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:32,780 INFO L353 BasicCegarLoop]: trace histogram [213, 212, 1, 1, 1] [2018-07-23 15:26:32,781 INFO L414 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:32,781 INFO L82 PathProgramCache]: Analyzing trace with hash -805356849, now seen corresponding path program 212 times [2018-07-23 15:26:32,781 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:34,108 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 15:26:34,108 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:34,109 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [214] total 214 [2018-07-23 15:26:34,109 INFO L450 AbstractCegarLoop]: Interpolant automaton has 215 states [2018-07-23 15:26:34,113 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2018-07-23 15:26:34,116 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23005, Invalid=23005, Unknown=0, NotChecked=0, Total=46010 [2018-07-23 15:26:34,116 INFO L87 Difference]: Start difference. First operand 429 states and 429 transitions. Second operand 215 states. [2018-07-23 15:26:35,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:35,624 INFO L93 Difference]: Finished difference Result 433 states and 433 transitions. [2018-07-23 15:26:35,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2018-07-23 15:26:35,625 INFO L78 Accepts]: Start accepts. Automaton has 215 states. Word has length 428 [2018-07-23 15:26:35,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:35,625 INFO L225 Difference]: With dead ends: 433 [2018-07-23 15:26:35,625 INFO L226 Difference]: Without dead ends: 431 [2018-07-23 15:26:35,630 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23005, Invalid=23005, Unknown=0, NotChecked=0, Total=46010 [2018-07-23 15:26:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-07-23 15:26:35,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2018-07-23 15:26:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2018-07-23 15:26:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 431 transitions. [2018-07-23 15:26:35,634 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 431 transitions. Word has length 428 [2018-07-23 15:26:35,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:35,635 INFO L471 AbstractCegarLoop]: Abstraction has 431 states and 431 transitions. [2018-07-23 15:26:35,635 INFO L472 AbstractCegarLoop]: Interpolant automaton has 215 states. [2018-07-23 15:26:35,635 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 431 transitions. [2018-07-23 15:26:35,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2018-07-23 15:26:35,636 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:35,636 INFO L353 BasicCegarLoop]: trace histogram [214, 213, 1, 1, 1] [2018-07-23 15:26:35,636 INFO L414 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:35,636 INFO L82 PathProgramCache]: Analyzing trace with hash -853766519, now seen corresponding path program 213 times [2018-07-23 15:26:35,637 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:37,000 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 15:26:37,000 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:37,000 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [215] total 215 [2018-07-23 15:26:37,000 INFO L450 AbstractCegarLoop]: Interpolant automaton has 216 states [2018-07-23 15:26:37,003 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2018-07-23 15:26:37,005 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23220, Invalid=23220, Unknown=0, NotChecked=0, Total=46440 [2018-07-23 15:26:37,005 INFO L87 Difference]: Start difference. First operand 431 states and 431 transitions. Second operand 216 states. [2018-07-23 15:26:39,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:39,453 INFO L93 Difference]: Finished difference Result 435 states and 435 transitions. [2018-07-23 15:26:39,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2018-07-23 15:26:39,453 INFO L78 Accepts]: Start accepts. Automaton has 216 states. Word has length 430 [2018-07-23 15:26:39,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:39,454 INFO L225 Difference]: With dead ends: 435 [2018-07-23 15:26:39,454 INFO L226 Difference]: Without dead ends: 433 [2018-07-23 15:26:39,457 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23220, Invalid=23220, Unknown=0, NotChecked=0, Total=46440 [2018-07-23 15:26:39,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2018-07-23 15:26:39,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2018-07-23 15:26:39,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2018-07-23 15:26:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 433 transitions. [2018-07-23 15:26:39,462 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 433 transitions. Word has length 430 [2018-07-23 15:26:39,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:39,462 INFO L471 AbstractCegarLoop]: Abstraction has 433 states and 433 transitions. [2018-07-23 15:26:39,462 INFO L472 AbstractCegarLoop]: Interpolant automaton has 216 states. [2018-07-23 15:26:39,462 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 433 transitions. [2018-07-23 15:26:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-07-23 15:26:39,463 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:39,463 INFO L353 BasicCegarLoop]: trace histogram [215, 214, 1, 1, 1] [2018-07-23 15:26:39,463 INFO L414 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:39,464 INFO L82 PathProgramCache]: Analyzing trace with hash -130819133, now seen corresponding path program 214 times [2018-07-23 15:26:39,464 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:40,927 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 15:26:40,927 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:40,927 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [216] total 216 [2018-07-23 15:26:40,927 INFO L450 AbstractCegarLoop]: Interpolant automaton has 217 states [2018-07-23 15:26:40,931 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 217 interpolants. [2018-07-23 15:26:40,933 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23436, Invalid=23436, Unknown=0, NotChecked=0, Total=46872 [2018-07-23 15:26:40,933 INFO L87 Difference]: Start difference. First operand 433 states and 433 transitions. Second operand 217 states. [2018-07-23 15:26:42,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:42,322 INFO L93 Difference]: Finished difference Result 437 states and 437 transitions. [2018-07-23 15:26:42,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2018-07-23 15:26:42,322 INFO L78 Accepts]: Start accepts. Automaton has 217 states. Word has length 432 [2018-07-23 15:26:42,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:42,323 INFO L225 Difference]: With dead ends: 437 [2018-07-23 15:26:42,323 INFO L226 Difference]: Without dead ends: 435 [2018-07-23 15:26:42,326 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 1 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 15:26:42,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-07-23 15:26:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2018-07-23 15:26:42,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2018-07-23 15:26:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 435 transitions. [2018-07-23 15:26:42,331 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 435 transitions. Word has length 432 [2018-07-23 15:26:42,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:42,331 INFO L471 AbstractCegarLoop]: Abstraction has 435 states and 435 transitions. [2018-07-23 15:26:42,331 INFO L472 AbstractCegarLoop]: Interpolant automaton has 217 states. [2018-07-23 15:26:42,331 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 435 transitions. [2018-07-23 15:26:42,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2018-07-23 15:26:42,333 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:42,333 INFO L353 BasicCegarLoop]: trace histogram [216, 215, 1, 1, 1] [2018-07-23 15:26:42,333 INFO L414 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:42,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1163083139, now seen corresponding path program 215 times [2018-07-23 15:26:42,333 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:43,770 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 15:26:43,770 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:43,771 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [217] total 217 [2018-07-23 15:26:43,771 INFO L450 AbstractCegarLoop]: Interpolant automaton has 218 states [2018-07-23 15:26:43,775 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2018-07-23 15:26:43,778 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23653, Invalid=23653, Unknown=0, NotChecked=0, Total=47306 [2018-07-23 15:26:43,778 INFO L87 Difference]: Start difference. First operand 435 states and 435 transitions. Second operand 218 states. [2018-07-23 15:26:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:46,433 INFO L93 Difference]: Finished difference Result 439 states and 439 transitions. [2018-07-23 15:26:46,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2018-07-23 15:26:46,433 INFO L78 Accepts]: Start accepts. Automaton has 218 states. Word has length 434 [2018-07-23 15:26:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:46,434 INFO L225 Difference]: With dead ends: 439 [2018-07-23 15:26:46,434 INFO L226 Difference]: Without dead ends: 437 [2018-07-23 15:26:46,437 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23653, Invalid=23653, Unknown=0, NotChecked=0, Total=47306 [2018-07-23 15:26:46,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2018-07-23 15:26:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2018-07-23 15:26:46,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2018-07-23 15:26:46,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 437 transitions. [2018-07-23 15:26:46,441 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 437 transitions. Word has length 434 [2018-07-23 15:26:46,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:46,442 INFO L471 AbstractCegarLoop]: Abstraction has 437 states and 437 transitions. [2018-07-23 15:26:46,442 INFO L472 AbstractCegarLoop]: Interpolant automaton has 218 states. [2018-07-23 15:26:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 437 transitions. [2018-07-23 15:26:46,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2018-07-23 15:26:46,443 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:46,443 INFO L353 BasicCegarLoop]: trace histogram [217, 216, 1, 1, 1] [2018-07-23 15:26:46,443 INFO L414 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:46,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1031347529, now seen corresponding path program 216 times [2018-07-23 15:26:46,444 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:47,924 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 15:26:47,924 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:47,924 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [218] total 218 [2018-07-23 15:26:47,925 INFO L450 AbstractCegarLoop]: Interpolant automaton has 219 states [2018-07-23 15:26:47,926 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 219 interpolants. [2018-07-23 15:26:47,927 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23871, Invalid=23871, Unknown=0, NotChecked=0, Total=47742 [2018-07-23 15:26:47,928 INFO L87 Difference]: Start difference. First operand 437 states and 437 transitions. Second operand 219 states. [2018-07-23 15:26:50,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:50,832 INFO L93 Difference]: Finished difference Result 441 states and 441 transitions. [2018-07-23 15:26:50,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2018-07-23 15:26:50,832 INFO L78 Accepts]: Start accepts. Automaton has 219 states. Word has length 436 [2018-07-23 15:26:50,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:50,833 INFO L225 Difference]: With dead ends: 441 [2018-07-23 15:26:50,833 INFO L226 Difference]: Without dead ends: 439 [2018-07-23 15:26:50,835 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23871, Invalid=23871, Unknown=0, NotChecked=0, Total=47742 [2018-07-23 15:26:50,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2018-07-23 15:26:50,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2018-07-23 15:26:50,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2018-07-23 15:26:50,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 439 transitions. [2018-07-23 15:26:50,839 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 439 transitions. Word has length 436 [2018-07-23 15:26:50,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:50,839 INFO L471 AbstractCegarLoop]: Abstraction has 439 states and 439 transitions. [2018-07-23 15:26:50,839 INFO L472 AbstractCegarLoop]: Interpolant automaton has 219 states. [2018-07-23 15:26:50,839 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 439 transitions. [2018-07-23 15:26:50,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2018-07-23 15:26:50,840 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:50,840 INFO L353 BasicCegarLoop]: trace histogram [218, 217, 1, 1, 1] [2018-07-23 15:26:50,841 INFO L414 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:50,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1012522097, now seen corresponding path program 217 times [2018-07-23 15:26:50,841 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:52,328 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 15:26:52,328 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:52,328 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [219] total 219 [2018-07-23 15:26:52,329 INFO L450 AbstractCegarLoop]: Interpolant automaton has 220 states [2018-07-23 15:26:52,333 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 220 interpolants. [2018-07-23 15:26:52,335 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24090, Invalid=24090, Unknown=0, NotChecked=0, Total=48180 [2018-07-23 15:26:52,336 INFO L87 Difference]: Start difference. First operand 439 states and 439 transitions. Second operand 220 states. [2018-07-23 15:26:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:53,365 INFO L93 Difference]: Finished difference Result 443 states and 443 transitions. [2018-07-23 15:26:53,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2018-07-23 15:26:53,365 INFO L78 Accepts]: Start accepts. Automaton has 220 states. Word has length 438 [2018-07-23 15:26:53,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:53,366 INFO L225 Difference]: With dead ends: 443 [2018-07-23 15:26:53,366 INFO L226 Difference]: Without dead ends: 441 [2018-07-23 15:26:53,369 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24090, Invalid=24090, Unknown=0, NotChecked=0, Total=48180 [2018-07-23 15:26:53,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2018-07-23 15:26:53,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2018-07-23 15:26:53,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2018-07-23 15:26:53,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 441 transitions. [2018-07-23 15:26:53,373 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 441 transitions. Word has length 438 [2018-07-23 15:26:53,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:53,374 INFO L471 AbstractCegarLoop]: Abstraction has 441 states and 441 transitions. [2018-07-23 15:26:53,374 INFO L472 AbstractCegarLoop]: Interpolant automaton has 220 states. [2018-07-23 15:26:53,374 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 441 transitions. [2018-07-23 15:26:53,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2018-07-23 15:26:53,375 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:53,375 INFO L353 BasicCegarLoop]: trace histogram [219, 218, 1, 1, 1] [2018-07-23 15:26:53,375 INFO L414 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:53,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1923788885, now seen corresponding path program 218 times [2018-07-23 15:26:53,375 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:54,910 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 15:26:54,910 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:54,911 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [220] total 220 [2018-07-23 15:26:54,911 INFO L450 AbstractCegarLoop]: Interpolant automaton has 221 states [2018-07-23 15:26:54,914 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2018-07-23 15:26:54,916 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24310, Invalid=24310, Unknown=0, NotChecked=0, Total=48620 [2018-07-23 15:26:54,917 INFO L87 Difference]: Start difference. First operand 441 states and 441 transitions. Second operand 221 states. [2018-07-23 15:26:55,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:55,860 INFO L93 Difference]: Finished difference Result 445 states and 445 transitions. [2018-07-23 15:26:55,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2018-07-23 15:26:55,861 INFO L78 Accepts]: Start accepts. Automaton has 221 states. Word has length 440 [2018-07-23 15:26:55,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:55,862 INFO L225 Difference]: With dead ends: 445 [2018-07-23 15:26:55,862 INFO L226 Difference]: Without dead ends: 443 [2018-07-23 15:26:55,865 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24310, Invalid=24310, Unknown=0, NotChecked=0, Total=48620 [2018-07-23 15:26:55,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2018-07-23 15:26:55,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2018-07-23 15:26:55,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2018-07-23 15:26:55,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 443 transitions. [2018-07-23 15:26:55,870 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 443 transitions. Word has length 440 [2018-07-23 15:26:55,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:55,870 INFO L471 AbstractCegarLoop]: Abstraction has 443 states and 443 transitions. [2018-07-23 15:26:55,870 INFO L472 AbstractCegarLoop]: Interpolant automaton has 221 states. [2018-07-23 15:26:55,870 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 443 transitions. [2018-07-23 15:26:55,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2018-07-23 15:26:55,872 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:55,872 INFO L353 BasicCegarLoop]: trace histogram [220, 219, 1, 1, 1] [2018-07-23 15:26:55,872 INFO L414 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:55,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1925129115, now seen corresponding path program 219 times [2018-07-23 15:26:55,872 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:57,638 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 15:26:57,639 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:57,639 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [221] total 221 [2018-07-23 15:26:57,639 INFO L450 AbstractCegarLoop]: Interpolant automaton has 222 states [2018-07-23 15:26:57,641 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 222 interpolants. [2018-07-23 15:26:57,642 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24531, Invalid=24531, Unknown=0, NotChecked=0, Total=49062 [2018-07-23 15:26:57,642 INFO L87 Difference]: Start difference. First operand 443 states and 443 transitions. Second operand 222 states. [2018-07-23 15:26:59,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:59,758 INFO L93 Difference]: Finished difference Result 447 states and 447 transitions. [2018-07-23 15:26:59,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2018-07-23 15:26:59,758 INFO L78 Accepts]: Start accepts. Automaton has 222 states. Word has length 442 [2018-07-23 15:26:59,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:59,759 INFO L225 Difference]: With dead ends: 447 [2018-07-23 15:26:59,759 INFO L226 Difference]: Without dead ends: 445 [2018-07-23 15:26:59,760 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 1 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 15:26:59,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2018-07-23 15:26:59,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 445. [2018-07-23 15:26:59,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2018-07-23 15:26:59,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 445 transitions. [2018-07-23 15:26:59,764 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 445 transitions. Word has length 442 [2018-07-23 15:26:59,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:59,764 INFO L471 AbstractCegarLoop]: Abstraction has 445 states and 445 transitions. [2018-07-23 15:26:59,764 INFO L472 AbstractCegarLoop]: Interpolant automaton has 222 states. [2018-07-23 15:26:59,764 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 445 transitions. [2018-07-23 15:26:59,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2018-07-23 15:26:59,766 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:59,766 INFO L353 BasicCegarLoop]: trace histogram [221, 220, 1, 1, 1] [2018-07-23 15:26:59,766 INFO L414 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:59,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1081877151, now seen corresponding path program 220 times [2018-07-23 15:26:59,766 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:01,392 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 15:27:01,393 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:01,393 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [222] total 222 [2018-07-23 15:27:01,393 INFO L450 AbstractCegarLoop]: Interpolant automaton has 223 states [2018-07-23 15:27:01,398 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 223 interpolants. [2018-07-23 15:27:01,402 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24753, Invalid=24753, Unknown=0, NotChecked=0, Total=49506 [2018-07-23 15:27:01,403 INFO L87 Difference]: Start difference. First operand 445 states and 445 transitions. Second operand 223 states. [2018-07-23 15:27:05,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:05,487 INFO L93 Difference]: Finished difference Result 449 states and 449 transitions. [2018-07-23 15:27:05,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2018-07-23 15:27:05,487 INFO L78 Accepts]: Start accepts. Automaton has 223 states. Word has length 444 [2018-07-23 15:27:05,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:05,488 INFO L225 Difference]: With dead ends: 449 [2018-07-23 15:27:05,488 INFO L226 Difference]: Without dead ends: 447 [2018-07-23 15:27:05,493 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 1 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 15:27:05,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-07-23 15:27:05,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-07-23 15:27:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-07-23 15:27:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 447 transitions. [2018-07-23 15:27:05,498 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 447 transitions. Word has length 444 [2018-07-23 15:27:05,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:05,498 INFO L471 AbstractCegarLoop]: Abstraction has 447 states and 447 transitions. [2018-07-23 15:27:05,498 INFO L472 AbstractCegarLoop]: Interpolant automaton has 223 states. [2018-07-23 15:27:05,498 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 447 transitions. [2018-07-23 15:27:05,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2018-07-23 15:27:05,499 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:05,500 INFO L353 BasicCegarLoop]: trace histogram [222, 221, 1, 1, 1] [2018-07-23 15:27:05,500 INFO L414 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:05,500 INFO L82 PathProgramCache]: Analyzing trace with hash 301908569, now seen corresponding path program 221 times [2018-07-23 15:27:05,500 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:07,276 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 15:27:07,276 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:07,276 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [223] total 223 [2018-07-23 15:27:07,277 INFO L450 AbstractCegarLoop]: Interpolant automaton has 224 states [2018-07-23 15:27:07,281 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2018-07-23 15:27:07,285 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24976, Invalid=24976, Unknown=0, NotChecked=0, Total=49952 [2018-07-23 15:27:07,285 INFO L87 Difference]: Start difference. First operand 447 states and 447 transitions. Second operand 224 states. [2018-07-23 15:27:10,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:10,780 INFO L93 Difference]: Finished difference Result 451 states and 451 transitions. [2018-07-23 15:27:10,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2018-07-23 15:27:10,781 INFO L78 Accepts]: Start accepts. Automaton has 224 states. Word has length 446 [2018-07-23 15:27:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:10,781 INFO L225 Difference]: With dead ends: 451 [2018-07-23 15:27:10,781 INFO L226 Difference]: Without dead ends: 449 [2018-07-23 15:27:10,784 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 1 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 15:27:10,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2018-07-23 15:27:10,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 449. [2018-07-23 15:27:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2018-07-23 15:27:10,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 449 transitions. [2018-07-23 15:27:10,789 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 449 transitions. Word has length 446 [2018-07-23 15:27:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:10,789 INFO L471 AbstractCegarLoop]: Abstraction has 449 states and 449 transitions. [2018-07-23 15:27:10,789 INFO L472 AbstractCegarLoop]: Interpolant automaton has 224 states. [2018-07-23 15:27:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 449 transitions. [2018-07-23 15:27:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2018-07-23 15:27:10,790 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:10,791 INFO L353 BasicCegarLoop]: trace histogram [223, 222, 1, 1, 1] [2018-07-23 15:27:10,791 INFO L414 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:10,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1923589229, now seen corresponding path program 222 times [2018-07-23 15:27:10,791 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:12,457 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 15:27:12,458 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:12,458 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [224] total 224 [2018-07-23 15:27:12,458 INFO L450 AbstractCegarLoop]: Interpolant automaton has 225 states [2018-07-23 15:27:12,460 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 225 interpolants. [2018-07-23 15:27:12,461 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25200, Invalid=25200, Unknown=0, NotChecked=0, Total=50400 [2018-07-23 15:27:12,461 INFO L87 Difference]: Start difference. First operand 449 states and 449 transitions. Second operand 225 states. [2018-07-23 15:27:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:14,731 INFO L93 Difference]: Finished difference Result 453 states and 453 transitions. [2018-07-23 15:27:14,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2018-07-23 15:27:14,732 INFO L78 Accepts]: Start accepts. Automaton has 225 states. Word has length 448 [2018-07-23 15:27:14,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:14,732 INFO L225 Difference]: With dead ends: 453 [2018-07-23 15:27:14,732 INFO L226 Difference]: Without dead ends: 451 [2018-07-23 15:27:14,734 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=25200, Invalid=25200, Unknown=0, NotChecked=0, Total=50400 [2018-07-23 15:27:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2018-07-23 15:27:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2018-07-23 15:27:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-07-23 15:27:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 451 transitions. [2018-07-23 15:27:14,738 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 451 transitions. Word has length 448 [2018-07-23 15:27:14,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:14,738 INFO L471 AbstractCegarLoop]: Abstraction has 451 states and 451 transitions. [2018-07-23 15:27:14,738 INFO L472 AbstractCegarLoop]: Interpolant automaton has 225 states. [2018-07-23 15:27:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 451 transitions. [2018-07-23 15:27:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2018-07-23 15:27:14,740 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:14,740 INFO L353 BasicCegarLoop]: trace histogram [224, 223, 1, 1, 1] [2018-07-23 15:27:14,740 INFO L414 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:14,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1733259699, now seen corresponding path program 223 times [2018-07-23 15:27:14,740 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 49952 backedges. 0 proven. 49952 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:16,345 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:16,346 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [225] total 225 [2018-07-23 15:27:16,346 INFO L450 AbstractCegarLoop]: Interpolant automaton has 226 states [2018-07-23 15:27:16,350 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 226 interpolants. [2018-07-23 15:27:16,353 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25425, Invalid=25425, Unknown=0, NotChecked=0, Total=50850 [2018-07-23 15:27:16,353 INFO L87 Difference]: Start difference. First operand 451 states and 451 transitions. Second operand 226 states. [2018-07-23 15:27:18,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:18,667 INFO L93 Difference]: Finished difference Result 455 states and 455 transitions. [2018-07-23 15:27:18,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2018-07-23 15:27:18,667 INFO L78 Accepts]: Start accepts. Automaton has 226 states. Word has length 450 [2018-07-23 15:27:18,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:18,668 INFO L225 Difference]: With dead ends: 455 [2018-07-23 15:27:18,668 INFO L226 Difference]: Without dead ends: 453 [2018-07-23 15:27:18,671 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=25425, Invalid=25425, Unknown=0, NotChecked=0, Total=50850 [2018-07-23 15:27:18,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2018-07-23 15:27:18,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 453. [2018-07-23 15:27:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2018-07-23 15:27:18,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 453 transitions. [2018-07-23 15:27:18,676 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 453 transitions. Word has length 450 [2018-07-23 15:27:18,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:18,676 INFO L471 AbstractCegarLoop]: Abstraction has 453 states and 453 transitions. [2018-07-23 15:27:18,677 INFO L472 AbstractCegarLoop]: Interpolant automaton has 226 states. [2018-07-23 15:27:18,677 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 453 transitions. [2018-07-23 15:27:18,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2018-07-23 15:27:18,678 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:18,678 INFO L353 BasicCegarLoop]: trace histogram [225, 224, 1, 1, 1] [2018-07-23 15:27:18,678 INFO L414 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:18,678 INFO L82 PathProgramCache]: Analyzing trace with hash 784792199, now seen corresponding path program 224 times [2018-07-23 15:27:18,678 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 50400 backedges. 0 proven. 50400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:20,252 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:20,252 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [226] total 226 [2018-07-23 15:27:20,253 INFO L450 AbstractCegarLoop]: Interpolant automaton has 227 states [2018-07-23 15:27:20,257 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 227 interpolants. [2018-07-23 15:27:20,260 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25651, Invalid=25651, Unknown=0, NotChecked=0, Total=51302 [2018-07-23 15:27:20,260 INFO L87 Difference]: Start difference. First operand 453 states and 453 transitions. Second operand 227 states. [2018-07-23 15:27:22,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:22,812 INFO L93 Difference]: Finished difference Result 457 states and 457 transitions. [2018-07-23 15:27:22,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2018-07-23 15:27:22,812 INFO L78 Accepts]: Start accepts. Automaton has 227 states. Word has length 452 [2018-07-23 15:27:22,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:22,813 INFO L225 Difference]: With dead ends: 457 [2018-07-23 15:27:22,813 INFO L226 Difference]: Without dead ends: 455 [2018-07-23 15:27:22,819 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=25651, Invalid=25651, Unknown=0, NotChecked=0, Total=51302 [2018-07-23 15:27:22,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2018-07-23 15:27:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 455. [2018-07-23 15:27:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2018-07-23 15:27:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 455 transitions. [2018-07-23 15:27:22,824 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 455 transitions. Word has length 452 [2018-07-23 15:27:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:22,824 INFO L471 AbstractCegarLoop]: Abstraction has 455 states and 455 transitions. [2018-07-23 15:27:22,824 INFO L472 AbstractCegarLoop]: Interpolant automaton has 227 states. [2018-07-23 15:27:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 455 transitions. [2018-07-23 15:27:22,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2018-07-23 15:27:22,827 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:22,827 INFO L353 BasicCegarLoop]: trace histogram [226, 225, 1, 1, 1] [2018-07-23 15:27:22,827 INFO L414 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:22,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1728888767, now seen corresponding path program 225 times [2018-07-23 15:27:22,827 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 50850 backedges. 0 proven. 50850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:24,697 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:24,697 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [227] total 227 [2018-07-23 15:27:24,698 INFO L450 AbstractCegarLoop]: Interpolant automaton has 228 states [2018-07-23 15:27:24,701 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2018-07-23 15:27:24,705 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25878, Invalid=25878, Unknown=0, NotChecked=0, Total=51756 [2018-07-23 15:27:24,705 INFO L87 Difference]: Start difference. First operand 455 states and 455 transitions. Second operand 228 states. [2018-07-23 15:27:27,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:27,370 INFO L93 Difference]: Finished difference Result 459 states and 459 transitions. [2018-07-23 15:27:27,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2018-07-23 15:27:27,370 INFO L78 Accepts]: Start accepts. Automaton has 228 states. Word has length 454 [2018-07-23 15:27:27,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:27,371 INFO L225 Difference]: With dead ends: 459 [2018-07-23 15:27:27,371 INFO L226 Difference]: Without dead ends: 457 [2018-07-23 15:27:27,374 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=25878, Invalid=25878, Unknown=0, NotChecked=0, Total=51756 [2018-07-23 15:27:27,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2018-07-23 15:27:27,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 457. [2018-07-23 15:27:27,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2018-07-23 15:27:27,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 457 transitions. [2018-07-23 15:27:27,381 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 457 transitions. Word has length 454 [2018-07-23 15:27:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:27,381 INFO L471 AbstractCegarLoop]: Abstraction has 457 states and 457 transitions. [2018-07-23 15:27:27,381 INFO L472 AbstractCegarLoop]: Interpolant automaton has 228 states. [2018-07-23 15:27:27,382 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 457 transitions. [2018-07-23 15:27:27,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2018-07-23 15:27:27,384 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:27,384 INFO L353 BasicCegarLoop]: trace histogram [227, 226, 1, 1, 1] [2018-07-23 15:27:27,384 INFO L414 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:27,384 INFO L82 PathProgramCache]: Analyzing trace with hash 690290555, now seen corresponding path program 226 times [2018-07-23 15:27:27,384 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 51302 backedges. 0 proven. 51302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:29,125 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:29,125 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [228] total 228 [2018-07-23 15:27:29,126 INFO L450 AbstractCegarLoop]: Interpolant automaton has 229 states [2018-07-23 15:27:29,129 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 229 interpolants. [2018-07-23 15:27:29,131 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26106, Invalid=26106, Unknown=0, NotChecked=0, Total=52212 [2018-07-23 15:27:29,132 INFO L87 Difference]: Start difference. First operand 457 states and 457 transitions. Second operand 229 states. [2018-07-23 15:27:31,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:31,633 INFO L93 Difference]: Finished difference Result 461 states and 461 transitions. [2018-07-23 15:27:31,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2018-07-23 15:27:31,633 INFO L78 Accepts]: Start accepts. Automaton has 229 states. Word has length 456 [2018-07-23 15:27:31,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:31,634 INFO L225 Difference]: With dead ends: 461 [2018-07-23 15:27:31,634 INFO L226 Difference]: Without dead ends: 459 [2018-07-23 15:27:31,636 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=26106, Invalid=26106, Unknown=0, NotChecked=0, Total=52212 [2018-07-23 15:27:31,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2018-07-23 15:27:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2018-07-23 15:27:31,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2018-07-23 15:27:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 459 transitions. [2018-07-23 15:27:31,640 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 459 transitions. Word has length 456 [2018-07-23 15:27:31,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:31,640 INFO L471 AbstractCegarLoop]: Abstraction has 459 states and 459 transitions. [2018-07-23 15:27:31,640 INFO L472 AbstractCegarLoop]: Interpolant automaton has 229 states. [2018-07-23 15:27:31,640 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 459 transitions. [2018-07-23 15:27:31,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-07-23 15:27:31,642 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:31,642 INFO L353 BasicCegarLoop]: trace histogram [228, 227, 1, 1, 1] [2018-07-23 15:27:31,642 INFO L414 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:31,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1944311861, now seen corresponding path program 227 times [2018-07-23 15:27:31,642 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 51756 backedges. 0 proven. 51756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:33,501 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:33,501 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [229] total 229 [2018-07-23 15:27:33,501 INFO L450 AbstractCegarLoop]: Interpolant automaton has 230 states [2018-07-23 15:27:33,503 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 230 interpolants. [2018-07-23 15:27:33,504 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26335, Invalid=26335, Unknown=0, NotChecked=0, Total=52670 [2018-07-23 15:27:33,504 INFO L87 Difference]: Start difference. First operand 459 states and 459 transitions. Second operand 230 states. Received shutdown request... [2018-07-23 15:27:35,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2018-07-23 15:27:35,891 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 15:27:35,899 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 15:27:35,899 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 03:27:35 BoogieIcfgContainer [2018-07-23 15:27:35,899 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 15:27:35,900 INFO L168 Benchmark]: Toolchain (without parser) took 257729.90 ms. Allocated memory was 1.5 GB in the beginning and 2.9 GB in the end (delta: 1.4 GB). Free memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: -884.3 MB). Peak memory consumption was 529.7 MB. Max. memory is 7.1 GB. [2018-07-23 15:27:35,905 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 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 15:27:35,905 INFO L168 Benchmark]: Boogie Preprocessor took 48.05 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 15:27:35,906 INFO L168 Benchmark]: RCFGBuilder took 201.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-23 15:27:35,906 INFO L168 Benchmark]: TraceAbstraction took 257476.77 ms. Allocated memory was 1.5 GB in the beginning and 2.9 GB in the end (delta: 1.4 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -894.9 MB). Peak memory consumption was 519.1 MB. Max. memory is 7.1 GB. [2018-07-23 15:27:35,911 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 0.24 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 48.05 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 201.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 257476.77 ms. Allocated memory was 1.5 GB in the beginning and 2.9 GB in the end (delta: 1.4 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -894.9 MB). Peak memory consumption was 519.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 31). Cancelled while BasicCegarLoop was constructing difference of abstraction (459states) and interpolant automaton (currently 221 states, 230 states before enhancement), while ReachableStatesComputation was computing reachable states (437 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 257.4s OverallTime, 228 OverallIterations, 228 TraceHistogramMax, 125.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 910 SDtfs, 0 SDslu, 37635 SDs, 0 SdLazy, 37863 SolverSat, 481 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26334 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 26106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=459occurred in iteration=227, 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: 1.0s AutomataMinimizationTime, 227 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 17.5s SatisfiabilityAnalysisTime, 102.2s InterpolantComputationTime, 52668 NumberOfCodeBlocks, 52668 NumberOfCodeBlocksAsserted, 228 NumberOfCheckSat, 52440 ConstructedInterpolants, 0 QuantifiedInterpolants, 47930844 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 228 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3950708 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/count_by_2.i_3.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_15-27-35-922.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_2.i_3.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_15-27-35-922.csv Completed graceful shutdown