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_1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 15:21:25,905 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 15:21:25,907 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 15:21:25,925 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 15:21:25,925 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 15:21:25,926 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 15:21:25,928 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 15:21:25,929 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 15:21:25,931 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 15:21:25,932 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 15:21:25,933 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-07-23 15:21:25,948 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 15:21:25,949 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 15:21:25,950 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 15:21:25,951 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 15:21:25,952 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 15:21:25,952 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 15:21:25,956 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 15:21:25,957 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 15:21:25,959 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-07-23 15:21:25,962 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 15:21:25,991 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 15:21:25,991 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 15:21:25,993 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 15:21:25,993 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 15:21:25,994 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 15:21:25,994 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 15:21:25,994 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 15:21:25,994 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 15:21:26,069 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 15:21:26,086 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 15:21:26,093 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 15:21:26,095 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 15:21:26,095 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 15:21:26,096 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_1.i_3.bpl [2018-07-23 15:21:26,096 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_1.i_3.bpl' [2018-07-23 15:21:26,145 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 15:21:26,147 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 15:21:26,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 15:21:26,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 15:21:26,148 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 15:21:26,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:21:26" (1/1) ... [2018-07-23 15:21:26,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:21:26" (1/1) ... [2018-07-23 15:21:26,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:21:26" (1/1) ... [2018-07-23 15:21:26,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:21:26" (1/1) ... [2018-07-23 15:21:26,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:21:26" (1/1) ... [2018-07-23 15:21:26,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:21:26" (1/1) ... [2018-07-23 15:21:26,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:21:26" (1/1) ... [2018-07-23 15:21:26,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 15:21:26,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 15:21:26,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 15:21:26,200 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 15:21:26,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:21:26" (1/1) ... [2018-07-23 15:21:26,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 15:21:26,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 15:21:26,460 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 15:21:26,461 INFO L202 PluginConnector]: Adding new model count_by_1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:21:26 BoogieIcfgContainer [2018-07-23 15:21:26,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 15:21:26,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 15:21:26,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 15:21:26,468 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 15:21:26,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:21:26" (1/2) ... [2018-07-23 15:21:26,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380b82aa and model type count_by_1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 03:21:26, skipping insertion in model container [2018-07-23 15:21:26,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:21:26" (2/2) ... [2018-07-23 15:21:26,474 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_1.i_3.bpl [2018-07-23 15:21:26,488 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 15:21:26,501 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 15:21:26,557 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 15:21:26,558 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 15:21:26,558 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 15:21:26,559 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 15:21:26,559 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 15:21:26,559 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 15:21:26,559 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 15:21:26,560 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 15:21:26,560 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 15:21:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-07-23 15:21:26,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-23 15:21:26,584 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:26,585 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-23 15:21:26,585 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:26,591 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-07-23 15:21:26,598 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:26,664 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 15:21:26,667 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:21:26,667 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 15:21:26,671 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 15:21:26,684 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 15:21:26,684 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:21:26,687 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-07-23 15:21:26,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:26,711 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2018-07-23 15:21:26,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 15:21:26,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-07-23 15:21:26,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:26,724 INFO L225 Difference]: With dead ends: 10 [2018-07-23 15:21:26,724 INFO L226 Difference]: Without dead ends: 7 [2018-07-23 15:21:26,728 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 15:21:26,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-23 15:21:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-23 15:21:26,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-23 15:21:26,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-23 15:21:26,769 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-07-23 15:21:26,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:26,769 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-23 15:21:26,769 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 15:21:26,770 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-23 15:21:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 15:21:26,770 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:26,771 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-07-23 15:21:26,771 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:26,771 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-07-23 15:21:26,772 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:26,797 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 15:21:26,797 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:26,798 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-23 15:21:26,800 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:21:26,800 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:21:26,800 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:21:26,801 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-07-23 15:21:26,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:26,819 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-07-23 15:21:26,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:21:26,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-07-23 15:21:26,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:26,821 INFO L225 Difference]: With dead ends: 11 [2018-07-23 15:21:26,821 INFO L226 Difference]: Without dead ends: 9 [2018-07-23 15:21:26,822 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 15:21:26,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-23 15:21:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-23 15:21:26,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 15:21:26,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-23 15:21:26,826 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-07-23 15:21:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:26,827 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-23 15:21:26,827 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:21:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-23 15:21:26,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-23 15:21:26,828 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:26,828 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-07-23 15:21:26,828 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:26,828 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-07-23 15:21:26,829 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:26,861 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 15:21:26,861 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:26,861 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:21:26,862 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 15:21:26,862 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 15:21:26,863 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:21:26,863 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-07-23 15:21:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:26,888 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-07-23 15:21:26,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 15:21:26,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-07-23 15:21:26,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:26,894 INFO L225 Difference]: With dead ends: 13 [2018-07-23 15:21:26,895 INFO L226 Difference]: Without dead ends: 11 [2018-07-23 15:21:26,895 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 15:21:26,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-07-23 15:21:26,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-07-23 15:21:26,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-23 15:21:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-23 15:21:26,899 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-07-23 15:21:26,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:26,900 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-23 15:21:26,900 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 15:21:26,900 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-23 15:21:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 15:21:26,901 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:26,901 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-07-23 15:21:26,901 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:26,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-07-23 15:21:26,902 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:26,955 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 15:21:26,956 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:26,956 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:21:26,957 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:21:26,957 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:21:26,957 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:21:26,958 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-07-23 15:21:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:26,976 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-07-23 15:21:26,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:21:26,976 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-07-23 15:21:26,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:26,978 INFO L225 Difference]: With dead ends: 15 [2018-07-23 15:21:26,979 INFO L226 Difference]: Without dead ends: 13 [2018-07-23 15:21:26,979 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 15:21:26,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-23 15:21:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-07-23 15:21:26,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-07-23 15:21:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-07-23 15:21:26,985 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-07-23 15:21:26,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:26,985 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-07-23 15:21:26,985 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:21:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-07-23 15:21:26,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-07-23 15:21:26,986 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:26,986 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-07-23 15:21:26,987 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:26,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-07-23 15:21:26,987 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:27,052 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 15:21:27,053 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:27,053 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-23 15:21:27,054 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 15:21:27,054 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 15:21:27,054 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:21:27,055 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-07-23 15:21:27,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:27,087 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-07-23 15:21:27,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 15:21:27,087 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-07-23 15:21:27,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:27,088 INFO L225 Difference]: With dead ends: 17 [2018-07-23 15:21:27,091 INFO L226 Difference]: Without dead ends: 15 [2018-07-23 15:21:27,092 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 15:21:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-23 15:21:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-07-23 15:21:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-07-23 15:21:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-07-23 15:21:27,100 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-07-23 15:21:27,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:27,101 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-07-23 15:21:27,101 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 15:21:27,101 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-07-23 15:21:27,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-23 15:21:27,102 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:27,102 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-07-23 15:21:27,102 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:27,103 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-07-23 15:21:27,103 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:27,143 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 15:21:27,144 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:27,144 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-23 15:21:27,145 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 15:21:27,145 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 15:21:27,145 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:21:27,146 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-07-23 15:21:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:27,162 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-07-23 15:21:27,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 15:21:27,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-07-23 15:21:27,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:27,164 INFO L225 Difference]: With dead ends: 19 [2018-07-23 15:21:27,164 INFO L226 Difference]: Without dead ends: 17 [2018-07-23 15:21:27,166 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 15:21:27,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-07-23 15:21:27,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-07-23 15:21:27,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-23 15:21:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-07-23 15:21:27,177 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-07-23 15:21:27,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:27,180 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-07-23 15:21:27,180 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 15:21:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-07-23 15:21:27,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-23 15:21:27,181 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:27,181 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-07-23 15:21:27,181 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-07-23 15:21:27,182 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:27,262 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 15:21:27,263 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:27,263 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-23 15:21:27,266 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 15:21:27,267 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 15:21:27,267 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:21:27,267 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-07-23 15:21:27,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:27,294 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-07-23 15:21:27,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 15:21:27,295 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-07-23 15:21:27,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:27,296 INFO L225 Difference]: With dead ends: 21 [2018-07-23 15:21:27,296 INFO L226 Difference]: Without dead ends: 19 [2018-07-23 15:21:27,296 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 15:21:27,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-07-23 15:21:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-07-23 15:21:27,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-07-23 15:21:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-07-23 15:21:27,301 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-07-23 15:21:27,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:27,301 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-07-23 15:21:27,301 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 15:21:27,302 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-07-23 15:21:27,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-07-23 15:21:27,303 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:27,304 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-07-23 15:21:27,304 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:27,304 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-07-23 15:21:27,304 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:27,365 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 15:21:27,366 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:27,366 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 15:21:27,366 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 15:21:27,367 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 15:21:27,367 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:21:27,368 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-07-23 15:21:27,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:27,395 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-07-23 15:21:27,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 15:21:27,396 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-07-23 15:21:27,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:27,398 INFO L225 Difference]: With dead ends: 23 [2018-07-23 15:21:27,398 INFO L226 Difference]: Without dead ends: 21 [2018-07-23 15:21:27,399 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 15:21:27,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-23 15:21:27,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-07-23 15:21:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-07-23 15:21:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-07-23 15:21:27,409 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-07-23 15:21:27,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:27,410 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-07-23 15:21:27,410 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 15:21:27,410 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-07-23 15:21:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-23 15:21:27,411 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:27,411 INFO L353 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-07-23 15:21:27,411 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:27,412 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-07-23 15:21:27,412 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:27,486 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 15:21:27,486 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:27,494 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-23 15:21:27,494 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 15:21:27,495 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 15:21:27,495 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:21:27,500 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-07-23 15:21:27,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:27,535 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-07-23 15:21:27,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 15:21:27,536 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-07-23 15:21:27,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:27,537 INFO L225 Difference]: With dead ends: 25 [2018-07-23 15:21:27,537 INFO L226 Difference]: Without dead ends: 23 [2018-07-23 15:21:27,537 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 15:21:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-07-23 15:21:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-07-23 15:21:27,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-23 15:21:27,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-07-23 15:21:27,543 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-07-23 15:21:27,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:27,544 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-07-23 15:21:27,544 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 15:21:27,544 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-07-23 15:21:27,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 15:21:27,545 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:27,545 INFO L353 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-07-23 15:21:27,545 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:27,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-07-23 15:21:27,546 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:27,587 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 15:21:27,587 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:27,587 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-23 15:21:27,588 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 15:21:27,588 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 15:21:27,588 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:21:27,589 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-07-23 15:21:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:27,605 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-07-23 15:21:27,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 15:21:27,606 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-07-23 15:21:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:27,607 INFO L225 Difference]: With dead ends: 27 [2018-07-23 15:21:27,607 INFO L226 Difference]: Without dead ends: 25 [2018-07-23 15:21:27,608 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 15:21:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-07-23 15:21:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-07-23 15:21:27,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-23 15:21:27,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-07-23 15:21:27,613 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-07-23 15:21:27,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:27,614 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-07-23 15:21:27,614 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 15:21:27,614 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-07-23 15:21:27,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-07-23 15:21:27,615 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:27,615 INFO L353 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-07-23 15:21:27,615 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:27,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-07-23 15:21:27,616 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:27,660 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 15:21:27,661 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:27,661 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-07-23 15:21:27,662 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 15:21:27,662 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 15:21:27,662 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:21:27,663 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-07-23 15:21:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:27,681 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-07-23 15:21:27,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 15:21:27,682 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-07-23 15:21:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:27,683 INFO L225 Difference]: With dead ends: 29 [2018-07-23 15:21:27,683 INFO L226 Difference]: Without dead ends: 27 [2018-07-23 15:21:27,684 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 15:21:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-23 15:21:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-07-23 15:21:27,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-07-23 15:21:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-07-23 15:21:27,689 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-07-23 15:21:27,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:27,690 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-07-23 15:21:27,690 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 15:21:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-07-23 15:21:27,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-23 15:21:27,691 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:27,691 INFO L353 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-07-23 15:21:27,692 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:27,692 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-07-23 15:21:27,692 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:27,746 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 15:21:27,747 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:27,747 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-23 15:21:27,747 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 15:21:27,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 15:21:27,748 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:21:27,748 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-07-23 15:21:27,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:27,768 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-07-23 15:21:27,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 15:21:27,768 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-07-23 15:21:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:27,772 INFO L225 Difference]: With dead ends: 31 [2018-07-23 15:21:27,773 INFO L226 Difference]: Without dead ends: 29 [2018-07-23 15:21:27,774 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 15:21:27,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-07-23 15:21:27,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-07-23 15:21:27,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-23 15:21:27,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-07-23 15:21:27,785 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-07-23 15:21:27,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:27,786 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-07-23 15:21:27,786 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 15:21:27,788 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-07-23 15:21:27,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-23 15:21:27,789 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:27,789 INFO L353 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-07-23 15:21:27,789 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:27,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-07-23 15:21:27,791 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:27,842 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 15:21:27,843 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:27,843 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-07-23 15:21:27,844 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 15:21:27,844 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 15:21:27,844 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:21:27,845 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-07-23 15:21:27,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:27,887 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-07-23 15:21:27,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 15:21:27,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-07-23 15:21:27,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:27,894 INFO L225 Difference]: With dead ends: 33 [2018-07-23 15:21:27,894 INFO L226 Difference]: Without dead ends: 31 [2018-07-23 15:21:27,895 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 15:21:27,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-07-23 15:21:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-07-23 15:21:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-07-23 15:21:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-07-23 15:21:27,902 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-07-23 15:21:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:27,903 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-07-23 15:21:27,903 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 15:21:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-07-23 15:21:27,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-23 15:21:27,904 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:27,904 INFO L353 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-07-23 15:21:27,904 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:27,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-07-23 15:21:27,911 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:27,991 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 15:21:27,991 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:27,992 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-23 15:21:27,992 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 15:21:27,996 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 15:21:27,996 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:21:27,996 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-07-23 15:21:28,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:28,030 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-07-23 15:21:28,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 15:21:28,031 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-07-23 15:21:28,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:28,033 INFO L225 Difference]: With dead ends: 35 [2018-07-23 15:21:28,034 INFO L226 Difference]: Without dead ends: 33 [2018-07-23 15:21:28,034 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 15:21:28,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-23 15:21:28,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-07-23 15:21:28,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-07-23 15:21:28,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-07-23 15:21:28,044 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-07-23 15:21:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:28,045 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-07-23 15:21:28,045 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 15:21:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-07-23 15:21:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-23 15:21:28,046 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:28,046 INFO L353 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-07-23 15:21:28,046 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:28,047 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-07-23 15:21:28,047 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:28,130 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 15:21:28,130 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:28,130 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-07-23 15:21:28,131 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 15:21:28,131 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 15:21:28,132 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:21:28,132 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-07-23 15:21:28,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:28,162 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-07-23 15:21:28,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 15:21:28,162 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-07-23 15:21:28,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:28,164 INFO L225 Difference]: With dead ends: 37 [2018-07-23 15:21:28,164 INFO L226 Difference]: Without dead ends: 35 [2018-07-23 15:21:28,164 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 15:21:28,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-07-23 15:21:28,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-07-23 15:21:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-23 15:21:28,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-07-23 15:21:28,170 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-07-23 15:21:28,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:28,170 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-07-23 15:21:28,170 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 15:21:28,170 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-07-23 15:21:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-23 15:21:28,171 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:28,172 INFO L353 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-07-23 15:21:28,172 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:28,172 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-07-23 15:21:28,172 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:28,233 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 15:21:28,233 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:28,233 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-07-23 15:21:28,234 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 15:21:28,236 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 15:21:28,237 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:21:28,237 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-07-23 15:21:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:28,266 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-07-23 15:21:28,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 15:21:28,267 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-07-23 15:21:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:28,268 INFO L225 Difference]: With dead ends: 39 [2018-07-23 15:21:28,268 INFO L226 Difference]: Without dead ends: 37 [2018-07-23 15:21:28,272 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 15:21:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-07-23 15:21:28,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-07-23 15:21:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-07-23 15:21:28,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-07-23 15:21:28,280 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-07-23 15:21:28,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:28,281 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-07-23 15:21:28,281 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 15:21:28,281 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-07-23 15:21:28,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-07-23 15:21:28,282 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:28,282 INFO L353 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-07-23 15:21:28,283 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:28,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-07-23 15:21:28,283 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:28,361 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 15:21:28,362 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:28,362 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-07-23 15:21:28,363 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 15:21:28,363 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 15:21:28,363 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:21:28,364 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-07-23 15:21:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:28,389 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-07-23 15:21:28,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 15:21:28,390 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-07-23 15:21:28,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:28,391 INFO L225 Difference]: With dead ends: 41 [2018-07-23 15:21:28,391 INFO L226 Difference]: Without dead ends: 39 [2018-07-23 15:21:28,395 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 15:21:28,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-23 15:21:28,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-07-23 15:21:28,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-07-23 15:21:28,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-07-23 15:21:28,405 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-07-23 15:21:28,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:28,411 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-07-23 15:21:28,411 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 15:21:28,411 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-07-23 15:21:28,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-23 15:21:28,412 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:28,412 INFO L353 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-07-23 15:21:28,413 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:28,413 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-07-23 15:21:28,413 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:28,508 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 15:21:28,508 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:28,509 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-07-23 15:21:28,509 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 15:21:28,509 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 15:21:28,510 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:21:28,510 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-07-23 15:21:28,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:28,533 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-07-23 15:21:28,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 15:21:28,534 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-07-23 15:21:28,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:28,535 INFO L225 Difference]: With dead ends: 43 [2018-07-23 15:21:28,536 INFO L226 Difference]: Without dead ends: 41 [2018-07-23 15:21:28,541 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 15:21:28,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-07-23 15:21:28,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-07-23 15:21:28,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-07-23 15:21:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-07-23 15:21:28,551 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-07-23 15:21:28,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:28,551 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-07-23 15:21:28,551 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 15:21:28,551 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-07-23 15:21:28,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-23 15:21:28,552 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:28,557 INFO L353 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-07-23 15:21:28,558 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:28,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-07-23 15:21:28,558 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:28,653 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 15:21:28,654 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:28,654 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-07-23 15:21:28,655 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 15:21:28,655 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 15:21:28,655 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:21:28,656 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-07-23 15:21:28,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:28,687 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-07-23 15:21:28,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 15:21:28,687 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-07-23 15:21:28,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:28,688 INFO L225 Difference]: With dead ends: 45 [2018-07-23 15:21:28,688 INFO L226 Difference]: Without dead ends: 43 [2018-07-23 15:21:28,689 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 15:21:28,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-07-23 15:21:28,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-07-23 15:21:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-07-23 15:21:28,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-07-23 15:21:28,697 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-07-23 15:21:28,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:28,697 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-07-23 15:21:28,698 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 15:21:28,698 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-07-23 15:21:28,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-07-23 15:21:28,699 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:28,699 INFO L353 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-07-23 15:21:28,699 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:28,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-07-23 15:21:28,702 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:28,786 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 15:21:28,786 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:28,787 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-07-23 15:21:28,787 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 15:21:28,787 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 15:21:28,788 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:21:28,788 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-07-23 15:21:28,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:28,811 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-07-23 15:21:28,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 15:21:28,811 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-07-23 15:21:28,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:28,812 INFO L225 Difference]: With dead ends: 47 [2018-07-23 15:21:28,812 INFO L226 Difference]: Without dead ends: 45 [2018-07-23 15:21:28,813 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 15:21:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-07-23 15:21:28,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-07-23 15:21:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-07-23 15:21:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-07-23 15:21:28,823 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-07-23 15:21:28,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:28,824 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-07-23 15:21:28,824 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 15:21:28,824 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-07-23 15:21:28,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-23 15:21:28,829 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:28,829 INFO L353 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-07-23 15:21:28,829 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:28,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-07-23 15:21:28,830 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:28,928 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 15:21:28,929 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:28,929 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-07-23 15:21:28,930 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 15:21:28,930 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 15:21:28,931 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:21:28,931 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-07-23 15:21:28,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:28,956 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-07-23 15:21:28,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 15:21:28,956 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-07-23 15:21:28,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:28,957 INFO L225 Difference]: With dead ends: 49 [2018-07-23 15:21:28,957 INFO L226 Difference]: Without dead ends: 47 [2018-07-23 15:21:28,958 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 15:21:28,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-07-23 15:21:28,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-07-23 15:21:28,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-23 15:21:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-07-23 15:21:28,967 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-07-23 15:21:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:28,967 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-07-23 15:21:28,968 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 15:21:28,968 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-07-23 15:21:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-23 15:21:28,968 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:28,969 INFO L353 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-07-23 15:21:28,969 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:28,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-07-23 15:21:28,970 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:29,084 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 15:21:29,084 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:29,085 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-07-23 15:21:29,085 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 15:21:29,086 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 15:21:29,086 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:21:29,086 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-07-23 15:21:29,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:29,108 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-07-23 15:21:29,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 15:21:29,109 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-07-23 15:21:29,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:29,110 INFO L225 Difference]: With dead ends: 51 [2018-07-23 15:21:29,110 INFO L226 Difference]: Without dead ends: 49 [2018-07-23 15:21:29,114 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 15:21:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-07-23 15:21:29,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-07-23 15:21:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-07-23 15:21:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-07-23 15:21:29,119 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-07-23 15:21:29,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:29,120 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-07-23 15:21:29,120 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 15:21:29,120 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-07-23 15:21:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-07-23 15:21:29,129 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:29,129 INFO L353 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-07-23 15:21:29,129 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:29,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-07-23 15:21:29,130 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:29,243 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 15:21:29,244 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:29,244 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-07-23 15:21:29,245 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 15:21:29,245 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 15:21:29,245 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:21:29,246 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-07-23 15:21:29,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:29,274 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-07-23 15:21:29,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-23 15:21:29,275 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-07-23 15:21:29,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:29,276 INFO L225 Difference]: With dead ends: 53 [2018-07-23 15:21:29,276 INFO L226 Difference]: Without dead ends: 51 [2018-07-23 15:21:29,277 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 15:21:29,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-07-23 15:21:29,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-07-23 15:21:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-07-23 15:21:29,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-07-23 15:21:29,288 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-07-23 15:21:29,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:29,288 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-07-23 15:21:29,288 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 15:21:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-07-23 15:21:29,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-23 15:21:29,289 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:29,293 INFO L353 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-07-23 15:21:29,293 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:29,293 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-07-23 15:21:29,293 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:29,406 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 15:21:29,406 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:29,408 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-07-23 15:21:29,408 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 15:21:29,408 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 15:21:29,409 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:21:29,409 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-07-23 15:21:29,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:29,430 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-07-23 15:21:29,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 15:21:29,431 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-07-23 15:21:29,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:29,431 INFO L225 Difference]: With dead ends: 55 [2018-07-23 15:21:29,432 INFO L226 Difference]: Without dead ends: 53 [2018-07-23 15:21:29,432 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 15:21:29,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-07-23 15:21:29,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-07-23 15:21:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 15:21:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-07-23 15:21:29,439 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-07-23 15:21:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:29,439 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-07-23 15:21:29,439 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 15:21:29,440 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-07-23 15:21:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-23 15:21:29,440 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:29,440 INFO L353 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-07-23 15:21:29,440 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:29,441 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-07-23 15:21:29,441 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:29,556 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 15:21:29,556 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:29,556 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-07-23 15:21:29,557 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 15:21:29,557 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 15:21:29,558 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:21:29,558 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-07-23 15:21:29,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:29,582 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-07-23 15:21:29,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 15:21:29,583 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-07-23 15:21:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:29,584 INFO L225 Difference]: With dead ends: 57 [2018-07-23 15:21:29,584 INFO L226 Difference]: Without dead ends: 55 [2018-07-23 15:21:29,585 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 15:21:29,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-07-23 15:21:29,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-07-23 15:21:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-07-23 15:21:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-07-23 15:21:29,591 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-07-23 15:21:29,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:29,591 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-07-23 15:21:29,591 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 15:21:29,591 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-07-23 15:21:29,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-07-23 15:21:29,592 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:29,594 INFO L353 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-07-23 15:21:29,594 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:29,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-07-23 15:21:29,595 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:29,716 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 15:21:29,717 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:29,717 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-07-23 15:21:29,718 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 15:21:29,718 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 15:21:29,719 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:21:29,719 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-07-23 15:21:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:29,742 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-07-23 15:21:29,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 15:21:29,742 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-07-23 15:21:29,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:29,743 INFO L225 Difference]: With dead ends: 59 [2018-07-23 15:21:29,743 INFO L226 Difference]: Without dead ends: 57 [2018-07-23 15:21:29,744 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 15:21:29,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-23 15:21:29,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-07-23 15:21:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-07-23 15:21:29,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-07-23 15:21:29,754 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-07-23 15:21:29,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:29,754 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-07-23 15:21:29,754 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 15:21:29,754 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-07-23 15:21:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 15:21:29,755 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:29,755 INFO L353 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-07-23 15:21:29,755 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:29,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-07-23 15:21:29,756 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:29,889 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 15:21:29,890 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:29,890 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-07-23 15:21:29,890 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 15:21:29,891 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 15:21:29,891 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:21:29,892 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-07-23 15:21:29,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:29,916 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-07-23 15:21:29,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 15:21:29,917 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-07-23 15:21:29,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:29,917 INFO L225 Difference]: With dead ends: 61 [2018-07-23 15:21:29,918 INFO L226 Difference]: Without dead ends: 59 [2018-07-23 15:21:29,919 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 15:21:29,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-07-23 15:21:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-07-23 15:21:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-07-23 15:21:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-07-23 15:21:29,923 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-07-23 15:21:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:29,924 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-07-23 15:21:29,924 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 15:21:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-07-23 15:21:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-23 15:21:29,925 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:29,925 INFO L353 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-07-23 15:21:29,925 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:29,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-07-23 15:21:29,928 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:30,062 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 15:21:30,063 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:30,063 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-07-23 15:21:30,064 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 15:21:30,064 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 15:21:30,065 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:21:30,065 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-07-23 15:21:30,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:30,092 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-07-23 15:21:30,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 15:21:30,092 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-07-23 15:21:30,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:30,093 INFO L225 Difference]: With dead ends: 63 [2018-07-23 15:21:30,093 INFO L226 Difference]: Without dead ends: 61 [2018-07-23 15:21:30,094 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 15:21:30,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-07-23 15:21:30,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-07-23 15:21:30,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-07-23 15:21:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-07-23 15:21:30,099 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-07-23 15:21:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:30,099 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-07-23 15:21:30,099 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 15:21:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-07-23 15:21:30,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-07-23 15:21:30,100 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:30,100 INFO L353 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-07-23 15:21:30,100 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:30,101 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-07-23 15:21:30,101 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:30,241 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 15:21:30,241 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:30,241 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-07-23 15:21:30,242 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 15:21:30,242 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 15:21:30,243 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:21:30,243 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-07-23 15:21:30,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:30,263 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-07-23 15:21:30,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 15:21:30,263 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-07-23 15:21:30,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:30,264 INFO L225 Difference]: With dead ends: 65 [2018-07-23 15:21:30,264 INFO L226 Difference]: Without dead ends: 63 [2018-07-23 15:21:30,265 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 15:21:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-07-23 15:21:30,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-07-23 15:21:30,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-07-23 15:21:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-07-23 15:21:30,271 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-07-23 15:21:30,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:30,272 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-07-23 15:21:30,272 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 15:21:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-07-23 15:21:30,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 15:21:30,273 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:30,273 INFO L353 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-07-23 15:21:30,273 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:30,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-07-23 15:21:30,274 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:30,408 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 15:21:30,408 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:30,409 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-07-23 15:21:30,409 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 15:21:30,410 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 15:21:30,410 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:21:30,411 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-07-23 15:21:30,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:30,434 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-07-23 15:21:30,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 15:21:30,435 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-07-23 15:21:30,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:30,436 INFO L225 Difference]: With dead ends: 67 [2018-07-23 15:21:30,436 INFO L226 Difference]: Without dead ends: 65 [2018-07-23 15:21:30,437 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 15:21:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-07-23 15:21:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-07-23 15:21:30,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-07-23 15:21:30,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-07-23 15:21:30,441 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-07-23 15:21:30,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:30,441 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-07-23 15:21:30,441 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 15:21:30,442 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-07-23 15:21:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-23 15:21:30,442 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:30,442 INFO L353 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-07-23 15:21:30,443 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:30,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-07-23 15:21:30,443 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:30,618 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 15:21:30,619 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:30,619 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-07-23 15:21:30,619 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 15:21:30,620 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 15:21:30,620 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:21:30,621 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-07-23 15:21:30,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:30,640 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-07-23 15:21:30,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-23 15:21:30,640 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-07-23 15:21:30,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:30,641 INFO L225 Difference]: With dead ends: 69 [2018-07-23 15:21:30,641 INFO L226 Difference]: Without dead ends: 67 [2018-07-23 15:21:30,642 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 15:21:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-07-23 15:21:30,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-07-23 15:21:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-07-23 15:21:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-07-23 15:21:30,646 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-07-23 15:21:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:30,646 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-07-23 15:21:30,646 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 15:21:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-07-23 15:21:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-07-23 15:21:30,647 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:30,647 INFO L353 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-07-23 15:21:30,647 INFO L414 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:30,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-07-23 15:21:30,647 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:30,774 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 15:21:30,774 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:30,775 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-07-23 15:21:30,775 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 15:21:30,775 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 15:21:30,776 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:21:30,776 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-07-23 15:21:30,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:30,795 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-07-23 15:21:30,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 15:21:30,796 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-07-23 15:21:30,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:30,797 INFO L225 Difference]: With dead ends: 71 [2018-07-23 15:21:30,797 INFO L226 Difference]: Without dead ends: 69 [2018-07-23 15:21:30,798 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 15:21:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-07-23 15:21:30,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-07-23 15:21:30,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-07-23 15:21:30,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-07-23 15:21:30,801 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-07-23 15:21:30,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:30,801 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-07-23 15:21:30,801 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 15:21:30,801 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-07-23 15:21:30,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 15:21:30,802 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:30,802 INFO L353 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-07-23 15:21:30,802 INFO L414 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:30,802 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-07-23 15:21:30,802 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:30,935 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 15:21:30,935 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:30,936 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-07-23 15:21:30,936 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 15:21:30,936 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 15:21:30,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:21:30,937 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-07-23 15:21:30,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:30,963 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-07-23 15:21:30,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 15:21:30,963 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-07-23 15:21:30,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:30,964 INFO L225 Difference]: With dead ends: 73 [2018-07-23 15:21:30,964 INFO L226 Difference]: Without dead ends: 71 [2018-07-23 15:21:30,965 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:21:30,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-07-23 15:21:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-07-23 15:21:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 15:21:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-07-23 15:21:30,969 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-07-23 15:21:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:30,969 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-07-23 15:21:30,970 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 15:21:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-07-23 15:21:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-07-23 15:21:30,970 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:30,970 INFO L353 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-07-23 15:21:30,971 INFO L414 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:30,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-07-23 15:21:30,971 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:31,109 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 15:21:31,110 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:31,110 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-07-23 15:21:31,110 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 15:21:31,111 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 15:21:31,112 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:21:31,112 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-07-23 15:21:31,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:31,136 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-07-23 15:21:31,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 15:21:31,136 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-07-23 15:21:31,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:31,137 INFO L225 Difference]: With dead ends: 75 [2018-07-23 15:21:31,137 INFO L226 Difference]: Without dead ends: 73 [2018-07-23 15:21:31,138 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:21:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-07-23 15:21:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-07-23 15:21:31,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-07-23 15:21:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-07-23 15:21:31,142 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-07-23 15:21:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:31,143 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-07-23 15:21:31,143 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 15:21:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-07-23 15:21:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-07-23 15:21:31,144 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:31,144 INFO L353 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-07-23 15:21:31,144 INFO L414 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:31,144 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-07-23 15:21:31,144 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:31,286 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 15:21:31,286 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:31,286 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-07-23 15:21:31,287 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 15:21:31,287 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 15:21:31,288 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:21:31,288 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-07-23 15:21:31,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:31,309 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-07-23 15:21:31,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-23 15:21:31,309 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-07-23 15:21:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:31,310 INFO L225 Difference]: With dead ends: 77 [2018-07-23 15:21:31,310 INFO L226 Difference]: Without dead ends: 75 [2018-07-23 15:21:31,311 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 15:21:31,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-07-23 15:21:31,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-07-23 15:21:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-07-23 15:21:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-07-23 15:21:31,314 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-07-23 15:21:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:31,315 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-07-23 15:21:31,315 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 15:21:31,315 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-07-23 15:21:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 15:21:31,315 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:31,316 INFO L353 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-07-23 15:21:31,316 INFO L414 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:31,316 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-07-23 15:21:31,316 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:31,462 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 15:21:31,462 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:31,463 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-07-23 15:21:31,463 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 15:21:31,463 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 15:21:31,464 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:21:31,464 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-07-23 15:21:31,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:31,492 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-07-23 15:21:31,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 15:21:31,492 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-07-23 15:21:31,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:31,493 INFO L225 Difference]: With dead ends: 79 [2018-07-23 15:21:31,493 INFO L226 Difference]: Without dead ends: 77 [2018-07-23 15:21:31,494 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 15:21:31,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-07-23 15:21:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-07-23 15:21:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-07-23 15:21:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-07-23 15:21:31,498 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-07-23 15:21:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:31,498 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-07-23 15:21:31,498 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 15:21:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-07-23 15:21:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-07-23 15:21:31,499 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:31,499 INFO L353 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-07-23 15:21:31,499 INFO L414 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:31,500 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-07-23 15:21:31,500 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:31,643 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 15:21:31,643 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:31,644 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-07-23 15:21:31,644 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 15:21:31,644 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 15:21:31,645 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:21:31,645 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-07-23 15:21:31,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:31,669 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-07-23 15:21:31,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 15:21:31,669 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-07-23 15:21:31,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:31,670 INFO L225 Difference]: With dead ends: 81 [2018-07-23 15:21:31,671 INFO L226 Difference]: Without dead ends: 79 [2018-07-23 15:21:31,673 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:21:31,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-07-23 15:21:31,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-07-23 15:21:31,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-07-23 15:21:31,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-07-23 15:21:31,676 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-07-23 15:21:31,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:31,677 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-07-23 15:21:31,677 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 15:21:31,677 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-07-23 15:21:31,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-07-23 15:21:31,678 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:31,678 INFO L353 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-07-23 15:21:31,678 INFO L414 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:31,678 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-07-23 15:21:31,678 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:31,826 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 15:21:31,826 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:31,826 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-07-23 15:21:31,827 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 15:21:31,827 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 15:21:31,828 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:21:31,828 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-07-23 15:21:31,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:31,861 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-07-23 15:21:31,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 15:21:31,862 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-07-23 15:21:31,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:31,863 INFO L225 Difference]: With dead ends: 83 [2018-07-23 15:21:31,863 INFO L226 Difference]: Without dead ends: 81 [2018-07-23 15:21:31,864 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 15:21:31,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-07-23 15:21:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-07-23 15:21:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-07-23 15:21:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-07-23 15:21:31,867 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-07-23 15:21:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:31,868 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-07-23 15:21:31,868 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 15:21:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-07-23 15:21:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 15:21:31,869 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:31,869 INFO L353 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-07-23 15:21:31,869 INFO L414 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:31,869 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-07-23 15:21:31,869 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:32,016 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 15:21:32,016 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:32,016 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-07-23 15:21:32,017 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 15:21:32,017 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 15:21:32,018 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:21:32,018 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-07-23 15:21:32,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:32,046 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-07-23 15:21:32,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 15:21:32,046 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-07-23 15:21:32,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:32,047 INFO L225 Difference]: With dead ends: 85 [2018-07-23 15:21:32,047 INFO L226 Difference]: Without dead ends: 83 [2018-07-23 15:21:32,048 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 15:21:32,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-07-23 15:21:32,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-07-23 15:21:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-07-23 15:21:32,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-07-23 15:21:32,052 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-07-23 15:21:32,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:32,052 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-07-23 15:21:32,052 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 15:21:32,052 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-07-23 15:21:32,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-07-23 15:21:32,053 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:32,053 INFO L353 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-07-23 15:21:32,054 INFO L414 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:32,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-07-23 15:21:32,054 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:32,210 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 15:21:32,211 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:32,211 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-07-23 15:21:32,211 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 15:21:32,212 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 15:21:32,213 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:21:32,213 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-07-23 15:21:32,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:32,239 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-07-23 15:21:32,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 15:21:32,239 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-07-23 15:21:32,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:32,240 INFO L225 Difference]: With dead ends: 87 [2018-07-23 15:21:32,240 INFO L226 Difference]: Without dead ends: 85 [2018-07-23 15:21:32,241 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 15:21:32,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-07-23 15:21:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-07-23 15:21:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-07-23 15:21:32,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-07-23 15:21:32,245 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-07-23 15:21:32,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:32,245 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-07-23 15:21:32,246 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 15:21:32,246 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-07-23 15:21:32,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-07-23 15:21:32,247 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:32,247 INFO L353 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-07-23 15:21:32,247 INFO L414 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:32,247 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-07-23 15:21:32,247 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:32,410 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 15:21:32,411 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:32,411 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-07-23 15:21:32,411 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 15:21:32,412 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 15:21:32,413 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:21:32,413 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-07-23 15:21:32,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:32,441 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-07-23 15:21:32,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 15:21:32,441 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-07-23 15:21:32,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:32,442 INFO L225 Difference]: With dead ends: 89 [2018-07-23 15:21:32,442 INFO L226 Difference]: Without dead ends: 87 [2018-07-23 15:21:32,443 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 15:21:32,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-07-23 15:21:32,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-07-23 15:21:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-07-23 15:21:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-07-23 15:21:32,448 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-07-23 15:21:32,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:32,449 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-07-23 15:21:32,449 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 15:21:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-07-23 15:21:32,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-23 15:21:32,450 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:32,450 INFO L353 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-07-23 15:21:32,450 INFO L414 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:32,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-07-23 15:21:32,451 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:32,646 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 15:21:32,646 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:32,646 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-07-23 15:21:32,647 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 15:21:32,647 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 15:21:32,648 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:21:32,649 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-07-23 15:21:32,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:32,690 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-07-23 15:21:32,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 15:21:32,690 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-07-23 15:21:32,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:32,691 INFO L225 Difference]: With dead ends: 91 [2018-07-23 15:21:32,692 INFO L226 Difference]: Without dead ends: 89 [2018-07-23 15:21:32,693 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 15:21:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-07-23 15:21:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-07-23 15:21:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 15:21:32,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-07-23 15:21:32,699 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-07-23 15:21:32,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:32,699 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-07-23 15:21:32,699 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 15:21:32,700 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-07-23 15:21:32,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-07-23 15:21:32,701 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:32,701 INFO L353 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-07-23 15:21:32,701 INFO L414 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:32,701 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-07-23 15:21:32,701 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:32,917 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 15:21:32,918 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:32,918 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-07-23 15:21:32,919 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 15:21:32,919 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 15:21:32,921 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:21:32,921 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-07-23 15:21:32,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:32,990 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-07-23 15:21:32,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-23 15:21:32,990 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-07-23 15:21:32,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:32,996 INFO L225 Difference]: With dead ends: 93 [2018-07-23 15:21:32,996 INFO L226 Difference]: Without dead ends: 91 [2018-07-23 15:21:32,997 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 15:21:32,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-07-23 15:21:33,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-07-23 15:21:33,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-07-23 15:21:33,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-07-23 15:21:33,004 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-07-23 15:21:33,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:33,005 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-07-23 15:21:33,005 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 15:21:33,005 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-07-23 15:21:33,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-07-23 15:21:33,006 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:33,006 INFO L353 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-07-23 15:21:33,007 INFO L414 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:33,007 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-07-23 15:21:33,007 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:33,196 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 15:21:33,197 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:33,197 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-07-23 15:21:33,198 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 15:21:33,198 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 15:21:33,200 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:21:33,201 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-07-23 15:21:33,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:33,232 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-07-23 15:21:33,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 15:21:33,232 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-07-23 15:21:33,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:33,233 INFO L225 Difference]: With dead ends: 95 [2018-07-23 15:21:33,234 INFO L226 Difference]: Without dead ends: 93 [2018-07-23 15:21:33,235 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 15:21:33,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-07-23 15:21:33,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-07-23 15:21:33,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-07-23 15:21:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-07-23 15:21:33,240 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-07-23 15:21:33,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:33,240 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-07-23 15:21:33,241 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 15:21:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-07-23 15:21:33,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-07-23 15:21:33,242 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:33,242 INFO L353 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-07-23 15:21:33,242 INFO L414 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:33,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-07-23 15:21:33,242 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:33,448 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 15:21:33,449 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:33,449 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-07-23 15:21:33,450 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 15:21:33,450 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 15:21:33,451 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:21:33,451 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-07-23 15:21:33,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:33,496 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-07-23 15:21:33,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 15:21:33,497 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-07-23 15:21:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:33,498 INFO L225 Difference]: With dead ends: 97 [2018-07-23 15:21:33,498 INFO L226 Difference]: Without dead ends: 95 [2018-07-23 15:21:33,499 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 15:21:33,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-07-23 15:21:33,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-07-23 15:21:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-07-23 15:21:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-07-23 15:21:33,503 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-07-23 15:21:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:33,503 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-07-23 15:21:33,503 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 15:21:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-07-23 15:21:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-07-23 15:21:33,504 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:33,505 INFO L353 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-07-23 15:21:33,505 INFO L414 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:33,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-07-23 15:21:33,505 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:33,723 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 15:21:33,724 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:33,724 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-07-23 15:21:33,724 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 15:21:33,725 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 15:21:33,726 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:21:33,726 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-07-23 15:21:33,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:33,771 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-07-23 15:21:33,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 15:21:33,772 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-07-23 15:21:33,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:33,773 INFO L225 Difference]: With dead ends: 99 [2018-07-23 15:21:33,773 INFO L226 Difference]: Without dead ends: 97 [2018-07-23 15:21:33,774 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 15:21:33,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-07-23 15:21:33,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-07-23 15:21:33,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-07-23 15:21:33,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-07-23 15:21:33,778 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-07-23 15:21:33,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:33,778 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-07-23 15:21:33,778 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 15:21:33,778 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-07-23 15:21:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-07-23 15:21:33,779 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:33,780 INFO L353 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-07-23 15:21:33,780 INFO L414 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:33,780 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-07-23 15:21:33,780 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:34,006 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 15:21:34,006 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:34,006 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-07-23 15:21:34,007 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 15:21:34,007 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 15:21:34,008 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:21:34,008 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-07-23 15:21:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:34,052 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-07-23 15:21:34,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 15:21:34,052 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-07-23 15:21:34,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:34,053 INFO L225 Difference]: With dead ends: 101 [2018-07-23 15:21:34,053 INFO L226 Difference]: Without dead ends: 99 [2018-07-23 15:21:34,054 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 15:21:34,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-07-23 15:21:34,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-07-23 15:21:34,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-07-23 15:21:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-07-23 15:21:34,059 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-07-23 15:21:34,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:34,059 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-07-23 15:21:34,059 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 15:21:34,059 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-07-23 15:21:34,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-07-23 15:21:34,060 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:34,061 INFO L353 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-07-23 15:21:34,061 INFO L414 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:34,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-07-23 15:21:34,061 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:34,297 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 15:21:34,298 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:34,298 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-07-23 15:21:34,298 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 15:21:34,299 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 15:21:34,300 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:21:34,300 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-07-23 15:21:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:34,346 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-07-23 15:21:34,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 15:21:34,346 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-07-23 15:21:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:34,347 INFO L225 Difference]: With dead ends: 103 [2018-07-23 15:21:34,347 INFO L226 Difference]: Without dead ends: 101 [2018-07-23 15:21:34,348 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 15:21:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-07-23 15:21:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-07-23 15:21:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-07-23 15:21:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-07-23 15:21:34,353 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-07-23 15:21:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:34,353 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-07-23 15:21:34,353 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 15:21:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-07-23 15:21:34,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-07-23 15:21:34,354 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:34,355 INFO L353 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-07-23 15:21:34,355 INFO L414 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:34,355 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-07-23 15:21:34,355 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:34,584 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 15:21:34,584 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:34,584 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-07-23 15:21:34,584 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 15:21:34,585 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 15:21:34,586 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:21:34,586 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-07-23 15:21:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:34,633 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-07-23 15:21:34,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-23 15:21:34,633 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-07-23 15:21:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:34,634 INFO L225 Difference]: With dead ends: 105 [2018-07-23 15:21:34,634 INFO L226 Difference]: Without dead ends: 103 [2018-07-23 15:21:34,635 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 15:21:34,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-07-23 15:21:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-07-23 15:21:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-07-23 15:21:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-07-23 15:21:34,639 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-07-23 15:21:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:34,639 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-07-23 15:21:34,639 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 15:21:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-07-23 15:21:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-07-23 15:21:34,641 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:34,641 INFO L353 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-07-23 15:21:34,641 INFO L414 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:34,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-07-23 15:21:34,642 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:34,865 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 15:21:34,865 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:34,865 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-07-23 15:21:34,865 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 15:21:34,866 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 15:21:34,867 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:21:34,867 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-07-23 15:21:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:34,911 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-07-23 15:21:34,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 15:21:34,911 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-07-23 15:21:34,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:34,912 INFO L225 Difference]: With dead ends: 107 [2018-07-23 15:21:34,913 INFO L226 Difference]: Without dead ends: 105 [2018-07-23 15:21:34,914 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 15:21:34,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-07-23 15:21:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-07-23 15:21:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-07-23 15:21:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-07-23 15:21:34,918 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-07-23 15:21:34,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:34,918 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-07-23 15:21:34,918 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 15:21:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-07-23 15:21:34,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-07-23 15:21:34,919 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:34,919 INFO L353 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-07-23 15:21:34,920 INFO L414 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:34,920 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-07-23 15:21:34,920 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:35,143 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 15:21:35,144 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:35,144 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-07-23 15:21:35,144 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 15:21:35,145 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 15:21:35,146 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:21:35,146 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-07-23 15:21:35,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:35,190 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-07-23 15:21:35,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-23 15:21:35,191 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-07-23 15:21:35,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:35,192 INFO L225 Difference]: With dead ends: 109 [2018-07-23 15:21:35,192 INFO L226 Difference]: Without dead ends: 107 [2018-07-23 15:21:35,193 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 15:21:35,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-07-23 15:21:35,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-07-23 15:21:35,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 15:21:35,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-07-23 15:21:35,197 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-07-23 15:21:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:35,198 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-07-23 15:21:35,198 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 15:21:35,198 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-07-23 15:21:35,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-07-23 15:21:35,199 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:35,199 INFO L353 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-07-23 15:21:35,199 INFO L414 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:35,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-07-23 15:21:35,200 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:35,455 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 15:21:35,456 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:35,456 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-07-23 15:21:35,456 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 15:21:35,457 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 15:21:35,458 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:21:35,458 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-07-23 15:21:35,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:35,498 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-07-23 15:21:35,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 15:21:35,499 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-07-23 15:21:35,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:35,500 INFO L225 Difference]: With dead ends: 111 [2018-07-23 15:21:35,500 INFO L226 Difference]: Without dead ends: 109 [2018-07-23 15:21:35,501 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 15:21:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-07-23 15:21:35,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-07-23 15:21:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-07-23 15:21:35,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-07-23 15:21:35,507 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-07-23 15:21:35,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:35,507 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-07-23 15:21:35,508 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 15:21:35,508 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-07-23 15:21:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-07-23 15:21:35,509 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:35,509 INFO L353 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-07-23 15:21:35,509 INFO L414 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:35,509 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-07-23 15:21:35,510 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:35,800 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 15:21:35,801 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:35,801 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-07-23 15:21:35,801 INFO L450 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-23 15:21:35,802 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-23 15:21:35,802 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:21:35,803 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-07-23 15:21:35,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:35,863 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-07-23 15:21:35,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-23 15:21:35,864 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-07-23 15:21:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:35,865 INFO L225 Difference]: With dead ends: 113 [2018-07-23 15:21:35,865 INFO L226 Difference]: Without dead ends: 111 [2018-07-23 15:21:35,866 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 15:21:35,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-07-23 15:21:35,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-07-23 15:21:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-07-23 15:21:35,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-07-23 15:21:35,871 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-07-23 15:21:35,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:35,871 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-07-23 15:21:35,871 INFO L472 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-23 15:21:35,871 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-07-23 15:21:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-07-23 15:21:35,872 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:35,873 INFO L353 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-07-23 15:21:35,873 INFO L414 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:35,873 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-07-23 15:21:35,873 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:36,082 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 15:21:36,083 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:36,083 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-07-23 15:21:36,083 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 15:21:36,084 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 15:21:36,085 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:21:36,085 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-07-23 15:21:36,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:36,140 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-07-23 15:21:36,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 15:21:36,140 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-07-23 15:21:36,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:36,141 INFO L225 Difference]: With dead ends: 115 [2018-07-23 15:21:36,141 INFO L226 Difference]: Without dead ends: 113 [2018-07-23 15:21:36,142 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 15:21:36,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-07-23 15:21:36,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-07-23 15:21:36,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-07-23 15:21:36,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-07-23 15:21:36,147 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-07-23 15:21:36,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:36,147 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-07-23 15:21:36,147 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 15:21:36,148 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-07-23 15:21:36,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-07-23 15:21:36,149 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:36,149 INFO L353 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-07-23 15:21:36,149 INFO L414 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:36,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-07-23 15:21:36,149 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:36,376 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 15:21:36,376 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:36,376 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-07-23 15:21:36,377 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 15:21:36,378 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 15:21:36,379 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:21:36,379 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-07-23 15:21:36,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:36,446 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-07-23 15:21:36,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-23 15:21:36,446 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-07-23 15:21:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:36,448 INFO L225 Difference]: With dead ends: 117 [2018-07-23 15:21:36,448 INFO L226 Difference]: Without dead ends: 115 [2018-07-23 15:21:36,449 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 15:21:36,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-07-23 15:21:36,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-07-23 15:21:36,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-07-23 15:21:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-07-23 15:21:36,454 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-07-23 15:21:36,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:36,454 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-07-23 15:21:36,454 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 15:21:36,454 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-07-23 15:21:36,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-07-23 15:21:36,456 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:36,456 INFO L353 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-07-23 15:21:36,456 INFO L414 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:36,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-07-23 15:21:36,456 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:36,693 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 15:21:36,693 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:36,693 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-07-23 15:21:36,694 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 15:21:36,694 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 15:21:36,695 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:21:36,696 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-07-23 15:21:36,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:36,769 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-07-23 15:21:36,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 15:21:36,769 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-07-23 15:21:36,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:36,771 INFO L225 Difference]: With dead ends: 119 [2018-07-23 15:21:36,771 INFO L226 Difference]: Without dead ends: 117 [2018-07-23 15:21:36,772 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 15:21:36,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-07-23 15:21:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-07-23 15:21:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-07-23 15:21:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-07-23 15:21:36,777 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-07-23 15:21:36,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:36,778 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-07-23 15:21:36,778 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 15:21:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-07-23 15:21:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-07-23 15:21:36,779 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:36,779 INFO L353 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-07-23 15:21:36,779 INFO L414 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:36,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-07-23 15:21:36,780 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:37,034 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 15:21:37,034 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:37,034 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-07-23 15:21:37,035 INFO L450 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-23 15:21:37,039 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-23 15:21:37,040 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:21:37,040 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-07-23 15:21:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:37,084 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-07-23 15:21:37,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 15:21:37,084 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-07-23 15:21:37,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:37,085 INFO L225 Difference]: With dead ends: 121 [2018-07-23 15:21:37,085 INFO L226 Difference]: Without dead ends: 119 [2018-07-23 15:21:37,087 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 15:21:37,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-07-23 15:21:37,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-07-23 15:21:37,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-07-23 15:21:37,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-07-23 15:21:37,091 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-07-23 15:21:37,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:37,091 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-07-23 15:21:37,091 INFO L472 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-23 15:21:37,092 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-07-23 15:21:37,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-07-23 15:21:37,093 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:37,093 INFO L353 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-07-23 15:21:37,093 INFO L414 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:37,093 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-07-23 15:21:37,093 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:37,335 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 15:21:37,336 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:37,336 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-07-23 15:21:37,337 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-23 15:21:37,337 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-23 15:21:37,338 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:21:37,339 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-07-23 15:21:37,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:37,411 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-07-23 15:21:37,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 15:21:37,411 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-07-23 15:21:37,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:37,413 INFO L225 Difference]: With dead ends: 123 [2018-07-23 15:21:37,413 INFO L226 Difference]: Without dead ends: 121 [2018-07-23 15:21:37,414 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 15:21:37,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-07-23 15:21:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-07-23 15:21:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-07-23 15:21:37,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-07-23 15:21:37,419 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-07-23 15:21:37,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:37,420 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-07-23 15:21:37,420 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-23 15:21:37,420 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-07-23 15:21:37,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-07-23 15:21:37,421 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:37,422 INFO L353 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-07-23 15:21:37,422 INFO L414 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:37,422 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-07-23 15:21:37,422 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:37,678 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 15:21:37,678 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:37,679 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-07-23 15:21:37,679 INFO L450 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-23 15:21:37,680 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-23 15:21:37,681 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:21:37,681 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-07-23 15:21:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:37,752 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-07-23 15:21:37,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-23 15:21:37,753 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-07-23 15:21:37,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:37,754 INFO L225 Difference]: With dead ends: 125 [2018-07-23 15:21:37,754 INFO L226 Difference]: Without dead ends: 123 [2018-07-23 15:21:37,755 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 15:21:37,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-07-23 15:21:37,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-07-23 15:21:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-07-23 15:21:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-07-23 15:21:37,760 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-07-23 15:21:37,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:37,761 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-07-23 15:21:37,761 INFO L472 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-23 15:21:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-07-23 15:21:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-07-23 15:21:37,762 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:37,762 INFO L353 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-07-23 15:21:37,763 INFO L414 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:37,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-07-23 15:21:37,763 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:38,021 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 15:21:38,022 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:38,022 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-07-23 15:21:38,022 INFO L450 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-23 15:21:38,023 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-23 15:21:38,024 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:21:38,024 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-07-23 15:21:38,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:38,089 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-07-23 15:21:38,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 15:21:38,089 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-07-23 15:21:38,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:38,090 INFO L225 Difference]: With dead ends: 127 [2018-07-23 15:21:38,090 INFO L226 Difference]: Without dead ends: 125 [2018-07-23 15:21:38,092 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 15:21:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-07-23 15:21:38,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-07-23 15:21:38,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 15:21:38,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-07-23 15:21:38,097 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-07-23 15:21:38,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:38,097 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-07-23 15:21:38,097 INFO L472 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-23 15:21:38,097 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-07-23 15:21:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-07-23 15:21:38,098 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:38,098 INFO L353 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-07-23 15:21:38,099 INFO L414 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:38,099 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-07-23 15:21:38,099 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:38,383 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 15:21:38,384 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:38,384 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-07-23 15:21:38,384 INFO L450 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-23 15:21:38,385 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-23 15:21:38,386 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:21:38,386 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-07-23 15:21:38,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:38,465 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-07-23 15:21:38,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-23 15:21:38,465 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-07-23 15:21:38,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:38,466 INFO L225 Difference]: With dead ends: 129 [2018-07-23 15:21:38,467 INFO L226 Difference]: Without dead ends: 127 [2018-07-23 15:21:38,468 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 15:21:38,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-07-23 15:21:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-07-23 15:21:38,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-07-23 15:21:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-07-23 15:21:38,474 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-07-23 15:21:38,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:38,475 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-07-23 15:21:38,475 INFO L472 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-23 15:21:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-07-23 15:21:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-07-23 15:21:38,476 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:38,476 INFO L353 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-07-23 15:21:38,477 INFO L414 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:38,477 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-07-23 15:21:38,477 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:38,819 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 15:21:38,820 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:38,820 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-07-23 15:21:38,821 INFO L450 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-23 15:21:38,821 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-23 15:21:38,822 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:21:38,822 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-07-23 15:21:38,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:38,902 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-07-23 15:21:38,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 15:21:38,903 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-07-23 15:21:38,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:38,904 INFO L225 Difference]: With dead ends: 131 [2018-07-23 15:21:38,904 INFO L226 Difference]: Without dead ends: 129 [2018-07-23 15:21:38,905 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 15:21:38,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-07-23 15:21:38,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-07-23 15:21:38,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-07-23 15:21:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-07-23 15:21:38,910 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-07-23 15:21:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:38,910 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-07-23 15:21:38,910 INFO L472 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-23 15:21:38,910 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-07-23 15:21:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-07-23 15:21:38,912 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:38,912 INFO L353 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-07-23 15:21:38,912 INFO L414 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:38,912 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-07-23 15:21:38,912 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:39,147 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 15:21:39,147 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:39,148 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-07-23 15:21:39,148 INFO L450 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-23 15:21:39,150 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-23 15:21:39,151 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:21:39,151 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-07-23 15:21:39,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:39,234 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-07-23 15:21:39,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-23 15:21:39,234 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-07-23 15:21:39,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:39,235 INFO L225 Difference]: With dead ends: 133 [2018-07-23 15:21:39,235 INFO L226 Difference]: Without dead ends: 131 [2018-07-23 15:21:39,237 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 15:21:39,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-07-23 15:21:39,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-07-23 15:21:39,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-07-23 15:21:39,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-07-23 15:21:39,244 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-07-23 15:21:39,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:39,244 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-07-23 15:21:39,244 INFO L472 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-23 15:21:39,244 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-07-23 15:21:39,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-07-23 15:21:39,245 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:39,246 INFO L353 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-07-23 15:21:39,246 INFO L414 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:39,246 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-07-23 15:21:39,246 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:39,481 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 15:21:39,482 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:39,482 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-07-23 15:21:39,482 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-23 15:21:39,483 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-23 15:21:39,484 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:21:39,484 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-07-23 15:21:39,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:39,534 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-07-23 15:21:39,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 15:21:39,535 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-07-23 15:21:39,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:39,536 INFO L225 Difference]: With dead ends: 135 [2018-07-23 15:21:39,536 INFO L226 Difference]: Without dead ends: 133 [2018-07-23 15:21:39,537 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 15:21:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-07-23 15:21:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-07-23 15:21:39,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-07-23 15:21:39,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-07-23 15:21:39,545 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-07-23 15:21:39,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:39,545 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-07-23 15:21:39,546 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-23 15:21:39,546 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-07-23 15:21:39,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-07-23 15:21:39,547 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:39,547 INFO L353 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-07-23 15:21:39,548 INFO L414 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:39,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-07-23 15:21:39,548 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:39,784 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 15:21:39,785 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:39,785 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-07-23 15:21:39,786 INFO L450 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-23 15:21:39,786 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-23 15:21:39,787 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:21:39,787 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-07-23 15:21:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:39,867 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-07-23 15:21:39,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-07-23 15:21:39,867 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-07-23 15:21:39,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:39,868 INFO L225 Difference]: With dead ends: 137 [2018-07-23 15:21:39,869 INFO L226 Difference]: Without dead ends: 135 [2018-07-23 15:21:39,869 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 15:21:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-07-23 15:21:39,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-07-23 15:21:39,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-07-23 15:21:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-07-23 15:21:39,879 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-07-23 15:21:39,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:39,879 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-07-23 15:21:39,879 INFO L472 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-23 15:21:39,879 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-07-23 15:21:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-07-23 15:21:39,881 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:39,881 INFO L353 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-07-23 15:21:39,881 INFO L414 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:39,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-07-23 15:21:39,882 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:40,134 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 15:21:40,135 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:40,135 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-07-23 15:21:40,136 INFO L450 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-23 15:21:40,137 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-23 15:21:40,137 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:21:40,138 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-07-23 15:21:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:40,241 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-07-23 15:21:40,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 15:21:40,241 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-07-23 15:21:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:40,242 INFO L225 Difference]: With dead ends: 139 [2018-07-23 15:21:40,243 INFO L226 Difference]: Without dead ends: 137 [2018-07-23 15:21:40,244 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 15:21:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-07-23 15:21:40,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-07-23 15:21:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-07-23 15:21:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-07-23 15:21:40,251 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-07-23 15:21:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:40,252 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-07-23 15:21:40,252 INFO L472 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-23 15:21:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-07-23 15:21:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-07-23 15:21:40,253 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:40,254 INFO L353 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-07-23 15:21:40,254 INFO L414 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:40,254 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-07-23 15:21:40,254 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:40,538 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 15:21:40,539 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:40,539 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-07-23 15:21:40,540 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-23 15:21:40,541 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-23 15:21:40,541 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:21:40,541 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-07-23 15:21:40,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:40,647 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-07-23 15:21:40,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-23 15:21:40,648 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-07-23 15:21:40,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:40,649 INFO L225 Difference]: With dead ends: 141 [2018-07-23 15:21:40,649 INFO L226 Difference]: Without dead ends: 139 [2018-07-23 15:21:40,650 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:21:40,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-07-23 15:21:40,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-07-23 15:21:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-07-23 15:21:40,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-07-23 15:21:40,655 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-07-23 15:21:40,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:40,656 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-07-23 15:21:40,656 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-23 15:21:40,656 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-07-23 15:21:40,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-07-23 15:21:40,657 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:40,658 INFO L353 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-07-23 15:21:40,658 INFO L414 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:40,658 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-07-23 15:21:40,658 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:40,928 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 15:21:40,929 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:40,929 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-07-23 15:21:40,929 INFO L450 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-23 15:21:40,930 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-23 15:21:40,931 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:21:40,931 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-07-23 15:21:41,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:41,018 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-07-23 15:21:41,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 15:21:41,018 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-07-23 15:21:41,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:41,019 INFO L225 Difference]: With dead ends: 143 [2018-07-23 15:21:41,020 INFO L226 Difference]: Without dead ends: 141 [2018-07-23 15:21:41,020 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:21:41,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-07-23 15:21:41,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-07-23 15:21:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-07-23 15:21:41,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-07-23 15:21:41,026 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-07-23 15:21:41,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:41,026 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-07-23 15:21:41,026 INFO L472 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-23 15:21:41,026 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-07-23 15:21:41,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-07-23 15:21:41,028 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:41,028 INFO L353 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-07-23 15:21:41,028 INFO L414 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:41,028 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-07-23 15:21:41,028 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:41,309 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 15:21:41,309 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:41,310 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-07-23 15:21:41,310 INFO L450 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-23 15:21:41,311 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-23 15:21:41,311 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:21:41,311 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-07-23 15:21:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:41,386 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-07-23 15:21:41,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-23 15:21:41,387 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-07-23 15:21:41,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:41,388 INFO L225 Difference]: With dead ends: 145 [2018-07-23 15:21:41,388 INFO L226 Difference]: Without dead ends: 143 [2018-07-23 15:21:41,389 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:21:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-07-23 15:21:41,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-07-23 15:21:41,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-07-23 15:21:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-07-23 15:21:41,394 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-07-23 15:21:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:41,394 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-07-23 15:21:41,394 INFO L472 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-23 15:21:41,394 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-07-23 15:21:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-07-23 15:21:41,396 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:41,396 INFO L353 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-07-23 15:21:41,396 INFO L414 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:41,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-07-23 15:21:41,396 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:41,650 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 15:21:41,650 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:41,650 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-07-23 15:21:41,651 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 15:21:41,652 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 15:21:41,652 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:21:41,653 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-07-23 15:21:41,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:41,754 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-07-23 15:21:41,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 15:21:41,755 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-07-23 15:21:41,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:41,756 INFO L225 Difference]: With dead ends: 147 [2018-07-23 15:21:41,756 INFO L226 Difference]: Without dead ends: 145 [2018-07-23 15:21:41,757 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 15:21:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-07-23 15:21:41,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-07-23 15:21:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-07-23 15:21:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-07-23 15:21:41,762 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-07-23 15:21:41,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:41,762 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-07-23 15:21:41,762 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 15:21:41,763 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-07-23 15:21:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-07-23 15:21:41,764 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:41,764 INFO L353 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-07-23 15:21:41,764 INFO L414 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:41,764 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-07-23 15:21:41,765 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:42,020 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 15:21:42,020 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:42,020 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-07-23 15:21:42,021 INFO L450 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-23 15:21:42,022 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-23 15:21:42,023 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:21:42,023 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-07-23 15:21:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:42,138 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-07-23 15:21:42,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-07-23 15:21:42,138 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-07-23 15:21:42,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:42,139 INFO L225 Difference]: With dead ends: 149 [2018-07-23 15:21:42,139 INFO L226 Difference]: Without dead ends: 147 [2018-07-23 15:21:42,140 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 15:21:42,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-07-23 15:21:42,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-07-23 15:21:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-07-23 15:21:42,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-07-23 15:21:42,147 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-07-23 15:21:42,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:42,148 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-07-23 15:21:42,148 INFO L472 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-23 15:21:42,148 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-07-23 15:21:42,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-07-23 15:21:42,151 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:42,151 INFO L353 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-07-23 15:21:42,152 INFO L414 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:42,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-07-23 15:21:42,152 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:42,407 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 15:21:42,407 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:42,407 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-07-23 15:21:42,408 INFO L450 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-23 15:21:42,409 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-23 15:21:42,409 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:21:42,409 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-07-23 15:21:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:42,511 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-07-23 15:21:42,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 15:21:42,511 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-07-23 15:21:42,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:42,512 INFO L225 Difference]: With dead ends: 151 [2018-07-23 15:21:42,512 INFO L226 Difference]: Without dead ends: 149 [2018-07-23 15:21:42,513 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 15:21:42,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-07-23 15:21:42,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-07-23 15:21:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-07-23 15:21:42,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-07-23 15:21:42,518 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-07-23 15:21:42,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:42,519 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-07-23 15:21:42,519 INFO L472 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-23 15:21:42,519 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-07-23 15:21:42,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-07-23 15:21:42,520 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:42,520 INFO L353 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-07-23 15:21:42,521 INFO L414 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:42,521 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-07-23 15:21:42,521 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:42,761 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 15:21:42,762 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:42,762 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-07-23 15:21:42,762 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-23 15:21:42,763 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-23 15:21:42,763 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:21:42,764 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-07-23 15:21:42,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:42,842 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-07-23 15:21:42,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-23 15:21:42,842 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-07-23 15:21:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:42,843 INFO L225 Difference]: With dead ends: 153 [2018-07-23 15:21:42,843 INFO L226 Difference]: Without dead ends: 151 [2018-07-23 15:21:42,844 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 15:21:42,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-07-23 15:21:42,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-07-23 15:21:42,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-07-23 15:21:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-07-23 15:21:42,850 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-07-23 15:21:42,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:42,850 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-07-23 15:21:42,850 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-23 15:21:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-07-23 15:21:42,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-07-23 15:21:42,851 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:42,852 INFO L353 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-07-23 15:21:42,852 INFO L414 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:42,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-07-23 15:21:42,852 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:43,101 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 15:21:43,101 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:43,101 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-07-23 15:21:43,102 INFO L450 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-23 15:21:43,103 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-23 15:21:43,103 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:21:43,103 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-07-23 15:21:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:43,185 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-07-23 15:21:43,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 15:21:43,185 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-07-23 15:21:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:43,186 INFO L225 Difference]: With dead ends: 155 [2018-07-23 15:21:43,186 INFO L226 Difference]: Without dead ends: 153 [2018-07-23 15:21:43,187 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 15:21:43,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-07-23 15:21:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-07-23 15:21:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-07-23 15:21:43,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-07-23 15:21:43,192 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-07-23 15:21:43,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:43,193 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-07-23 15:21:43,193 INFO L472 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-23 15:21:43,193 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-07-23 15:21:43,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-07-23 15:21:43,194 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:43,195 INFO L353 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-07-23 15:21:43,195 INFO L414 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:43,195 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-07-23 15:21:43,195 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:43,495 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 15:21:43,496 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:43,496 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-07-23 15:21:43,496 INFO L450 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-23 15:21:43,497 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-23 15:21:43,498 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:21:43,499 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-07-23 15:21:43,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:43,640 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-07-23 15:21:43,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-07-23 15:21:43,641 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-07-23 15:21:43,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:43,642 INFO L225 Difference]: With dead ends: 157 [2018-07-23 15:21:43,642 INFO L226 Difference]: Without dead ends: 155 [2018-07-23 15:21:43,643 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 15:21:43,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-07-23 15:21:43,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-07-23 15:21:43,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-07-23 15:21:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-07-23 15:21:43,650 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-07-23 15:21:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:43,651 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-07-23 15:21:43,651 INFO L472 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-23 15:21:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-07-23 15:21:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-07-23 15:21:43,653 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:43,653 INFO L353 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-07-23 15:21:43,653 INFO L414 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:43,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-07-23 15:21:43,654 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:44,075 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 15:21:44,076 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:44,076 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-07-23 15:21:44,076 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-23 15:21:44,077 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-23 15:21:44,078 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:21:44,078 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-07-23 15:21:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:44,140 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-07-23 15:21:44,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 15:21:44,140 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-07-23 15:21:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:44,142 INFO L225 Difference]: With dead ends: 159 [2018-07-23 15:21:44,142 INFO L226 Difference]: Without dead ends: 157 [2018-07-23 15:21:44,143 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 15:21:44,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-07-23 15:21:44,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-07-23 15:21:44,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-07-23 15:21:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-07-23 15:21:44,149 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-07-23 15:21:44,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:44,150 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-07-23 15:21:44,150 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-23 15:21:44,150 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-07-23 15:21:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-07-23 15:21:44,152 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:44,152 INFO L353 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-07-23 15:21:44,152 INFO L414 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:44,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-07-23 15:21:44,152 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:44,385 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 15:21:44,386 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:44,386 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-07-23 15:21:44,386 INFO L450 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-23 15:21:44,387 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-23 15:21:44,387 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:21:44,388 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-07-23 15:21:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:44,508 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-07-23 15:21:44,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-23 15:21:44,508 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-07-23 15:21:44,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:44,509 INFO L225 Difference]: With dead ends: 161 [2018-07-23 15:21:44,510 INFO L226 Difference]: Without dead ends: 159 [2018-07-23 15:21:44,510 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 15:21:44,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-07-23 15:21:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-07-23 15:21:44,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-07-23 15:21:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-07-23 15:21:44,515 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-07-23 15:21:44,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:44,516 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-07-23 15:21:44,516 INFO L472 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-23 15:21:44,516 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-07-23 15:21:44,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-07-23 15:21:44,517 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:44,517 INFO L353 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-07-23 15:21:44,517 INFO L414 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:44,517 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-07-23 15:21:44,517 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:44,739 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 15:21:44,739 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:44,739 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-07-23 15:21:44,740 INFO L450 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-23 15:21:44,740 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-23 15:21:44,741 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:21:44,741 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-07-23 15:21:44,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:44,848 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-07-23 15:21:44,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 15:21:44,848 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-07-23 15:21:44,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:44,850 INFO L225 Difference]: With dead ends: 163 [2018-07-23 15:21:44,850 INFO L226 Difference]: Without dead ends: 161 [2018-07-23 15:21:44,851 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 15:21:44,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-07-23 15:21:44,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-07-23 15:21:44,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-07-23 15:21:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-07-23 15:21:44,856 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-07-23 15:21:44,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:44,856 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-07-23 15:21:44,856 INFO L472 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-23 15:21:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-07-23 15:21:44,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-07-23 15:21:44,857 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:44,858 INFO L353 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-07-23 15:21:44,858 INFO L414 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:44,858 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-07-23 15:21:44,858 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:45,126 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 15:21:45,126 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:45,126 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-07-23 15:21:45,127 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-23 15:21:45,128 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-23 15:21:45,128 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:21:45,129 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-07-23 15:21:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:45,197 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-07-23 15:21:45,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-23 15:21:45,197 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-07-23 15:21:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:45,198 INFO L225 Difference]: With dead ends: 165 [2018-07-23 15:21:45,198 INFO L226 Difference]: Without dead ends: 163 [2018-07-23 15:21:45,199 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 15:21:45,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-07-23 15:21:45,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-07-23 15:21:45,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-07-23 15:21:45,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-07-23 15:21:45,204 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-07-23 15:21:45,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:45,205 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-07-23 15:21:45,205 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-23 15:21:45,205 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-07-23 15:21:45,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-07-23 15:21:45,206 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:45,206 INFO L353 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-07-23 15:21:45,206 INFO L414 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:45,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-07-23 15:21:45,206 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:45,444 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 15:21:45,444 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:45,445 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-07-23 15:21:45,445 INFO L450 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-23 15:21:45,446 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-23 15:21:45,447 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:21:45,447 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-07-23 15:21:45,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:45,569 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-07-23 15:21:45,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 15:21:45,569 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-07-23 15:21:45,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:45,570 INFO L225 Difference]: With dead ends: 167 [2018-07-23 15:21:45,570 INFO L226 Difference]: Without dead ends: 165 [2018-07-23 15:21:45,571 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:21:45,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-07-23 15:21:45,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-07-23 15:21:45,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-07-23 15:21:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-07-23 15:21:45,576 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-07-23 15:21:45,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:45,576 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-07-23 15:21:45,576 INFO L472 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-23 15:21:45,576 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-07-23 15:21:45,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-07-23 15:21:45,577 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:45,578 INFO L353 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-07-23 15:21:45,578 INFO L414 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:45,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-07-23 15:21:45,578 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:45,879 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 15:21:45,879 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:45,879 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-07-23 15:21:45,880 INFO L450 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-07-23 15:21:45,881 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-07-23 15:21:45,881 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:21:45,881 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-07-23 15:21:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:46,061 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-07-23 15:21:46,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-23 15:21:46,061 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-07-23 15:21:46,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:46,062 INFO L225 Difference]: With dead ends: 169 [2018-07-23 15:21:46,062 INFO L226 Difference]: Without dead ends: 167 [2018-07-23 15:21:46,063 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 15:21:46,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-07-23 15:21:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-07-23 15:21:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-07-23 15:21:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-07-23 15:21:46,068 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-07-23 15:21:46,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:46,069 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-07-23 15:21:46,069 INFO L472 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-07-23 15:21:46,069 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-07-23 15:21:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-07-23 15:21:46,070 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:46,071 INFO L353 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-07-23 15:21:46,071 INFO L414 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:46,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-07-23 15:21:46,071 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:46,406 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 15:21:46,407 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:46,407 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-07-23 15:21:46,407 INFO L450 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-23 15:21:46,408 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-23 15:21:46,408 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:21:46,408 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-07-23 15:21:46,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:46,548 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-07-23 15:21:46,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 15:21:46,548 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-07-23 15:21:46,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:46,550 INFO L225 Difference]: With dead ends: 171 [2018-07-23 15:21:46,550 INFO L226 Difference]: Without dead ends: 169 [2018-07-23 15:21:46,550 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 15:21:46,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-07-23 15:21:46,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-07-23 15:21:46,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-07-23 15:21:46,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-07-23 15:21:46,555 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-07-23 15:21:46,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:46,556 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-07-23 15:21:46,556 INFO L472 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-23 15:21:46,556 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-07-23 15:21:46,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-07-23 15:21:46,557 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:46,557 INFO L353 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-07-23 15:21:46,557 INFO L414 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:46,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-07-23 15:21:46,557 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:46,835 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 15:21:46,835 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:46,836 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-07-23 15:21:46,836 INFO L450 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-07-23 15:21:46,837 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-07-23 15:21:46,837 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:21:46,837 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-07-23 15:21:46,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:46,971 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-07-23 15:21:46,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-23 15:21:46,971 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-07-23 15:21:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:46,973 INFO L225 Difference]: With dead ends: 173 [2018-07-23 15:21:46,973 INFO L226 Difference]: Without dead ends: 171 [2018-07-23 15:21:46,974 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 15:21:46,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-07-23 15:21:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-07-23 15:21:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-07-23 15:21:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-07-23 15:21:46,978 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-07-23 15:21:46,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:46,979 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-07-23 15:21:46,979 INFO L472 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-07-23 15:21:46,979 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-07-23 15:21:46,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-07-23 15:21:46,980 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:46,980 INFO L353 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-07-23 15:21:46,980 INFO L414 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:46,980 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-07-23 15:21:46,980 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:47,304 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 15:21:47,304 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:47,304 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-07-23 15:21:47,305 INFO L450 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-23 15:21:47,306 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-23 15:21:47,307 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:21:47,307 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-07-23 15:21:47,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:47,527 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-07-23 15:21:47,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 15:21:47,528 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-07-23 15:21:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:47,529 INFO L225 Difference]: With dead ends: 175 [2018-07-23 15:21:47,529 INFO L226 Difference]: Without dead ends: 173 [2018-07-23 15:21:47,530 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 15:21:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-07-23 15:21:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-07-23 15:21:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-07-23 15:21:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-07-23 15:21:47,535 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-07-23 15:21:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:47,536 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-07-23 15:21:47,536 INFO L472 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-23 15:21:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-07-23 15:21:47,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-07-23 15:21:47,537 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:47,537 INFO L353 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-07-23 15:21:47,537 INFO L414 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:47,538 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-07-23 15:21:47,538 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:47,904 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 15:21:47,904 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:47,905 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-07-23 15:21:47,905 INFO L450 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-23 15:21:47,906 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-23 15:21:47,907 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:21:47,907 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-07-23 15:21:48,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:48,094 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-07-23 15:21:48,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-23 15:21:48,094 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-07-23 15:21:48,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:48,095 INFO L225 Difference]: With dead ends: 177 [2018-07-23 15:21:48,095 INFO L226 Difference]: Without dead ends: 175 [2018-07-23 15:21:48,096 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 15:21:48,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-07-23 15:21:48,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-07-23 15:21:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-07-23 15:21:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-07-23 15:21:48,101 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-07-23 15:21:48,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:48,102 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-07-23 15:21:48,102 INFO L472 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-23 15:21:48,102 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-07-23 15:21:48,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-07-23 15:21:48,103 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:48,103 INFO L353 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-07-23 15:21:48,103 INFO L414 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:48,103 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-07-23 15:21:48,103 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:48,425 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 15:21:48,426 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:48,426 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-07-23 15:21:48,426 INFO L450 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-23 15:21:48,427 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-23 15:21:48,428 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:21:48,428 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-07-23 15:21:48,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:48,547 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-07-23 15:21:48,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 15:21:48,547 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-07-23 15:21:48,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:48,549 INFO L225 Difference]: With dead ends: 179 [2018-07-23 15:21:48,549 INFO L226 Difference]: Without dead ends: 177 [2018-07-23 15:21:48,550 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 15:21:48,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-07-23 15:21:48,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-07-23 15:21:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-07-23 15:21:48,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-07-23 15:21:48,554 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-07-23 15:21:48,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:48,555 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-07-23 15:21:48,555 INFO L472 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-23 15:21:48,555 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-07-23 15:21:48,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-07-23 15:21:48,556 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:48,556 INFO L353 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-07-23 15:21:48,556 INFO L414 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:48,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-07-23 15:21:48,556 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:48,882 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 15:21:48,882 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:48,882 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-07-23 15:21:48,882 INFO L450 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-07-23 15:21:48,883 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-07-23 15:21:48,884 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:21:48,884 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-07-23 15:21:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:48,959 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-07-23 15:21:48,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-07-23 15:21:48,959 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-07-23 15:21:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:48,960 INFO L225 Difference]: With dead ends: 181 [2018-07-23 15:21:48,960 INFO L226 Difference]: Without dead ends: 179 [2018-07-23 15:21:48,961 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 15:21:48,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-07-23 15:21:48,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-07-23 15:21:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-07-23 15:21:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-07-23 15:21:48,966 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-07-23 15:21:48,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:48,966 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-07-23 15:21:48,966 INFO L472 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-07-23 15:21:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-07-23 15:21:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-07-23 15:21:48,967 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:48,968 INFO L353 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-07-23 15:21:48,968 INFO L414 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:48,968 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-07-23 15:21:48,968 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:49,380 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 15:21:49,381 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:49,381 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-07-23 15:21:49,381 INFO L450 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-23 15:21:49,382 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-23 15:21:49,383 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:21:49,383 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-07-23 15:21:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:49,525 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-07-23 15:21:49,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 15:21:49,525 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-07-23 15:21:49,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:49,527 INFO L225 Difference]: With dead ends: 183 [2018-07-23 15:21:49,527 INFO L226 Difference]: Without dead ends: 181 [2018-07-23 15:21:49,528 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 15:21:49,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-07-23 15:21:49,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-07-23 15:21:49,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-07-23 15:21:49,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-07-23 15:21:49,534 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-07-23 15:21:49,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:49,534 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-07-23 15:21:49,534 INFO L472 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-23 15:21:49,535 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-07-23 15:21:49,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-07-23 15:21:49,536 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:49,536 INFO L353 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-07-23 15:21:49,536 INFO L414 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:49,537 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-07-23 15:21:49,537 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:49,807 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 15:21:49,807 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:49,808 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2018-07-23 15:21:49,808 INFO L450 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-07-23 15:21:49,809 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-07-23 15:21:49,809 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:21:49,810 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-07-23 15:21:49,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:49,927 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-07-23 15:21:49,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-07-23 15:21:49,927 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-07-23 15:21:49,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:49,929 INFO L225 Difference]: With dead ends: 185 [2018-07-23 15:21:49,929 INFO L226 Difference]: Without dead ends: 183 [2018-07-23 15:21:49,930 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:21:49,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-07-23 15:21:49,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-07-23 15:21:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-07-23 15:21:49,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-07-23 15:21:49,935 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-07-23 15:21:49,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:49,935 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-07-23 15:21:49,935 INFO L472 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-07-23 15:21:49,935 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-07-23 15:21:49,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-07-23 15:21:49,936 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:49,937 INFO L353 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-07-23 15:21:49,937 INFO L414 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:49,937 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-07-23 15:21:49,937 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:50,188 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 15:21:50,188 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:50,188 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-07-23 15:21:50,189 INFO L450 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-23 15:21:50,189 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-23 15:21:50,190 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:21:50,190 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-07-23 15:21:50,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:50,306 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-07-23 15:21:50,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 15:21:50,306 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-07-23 15:21:50,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:50,308 INFO L225 Difference]: With dead ends: 187 [2018-07-23 15:21:50,308 INFO L226 Difference]: Without dead ends: 185 [2018-07-23 15:21:50,309 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:21:50,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-07-23 15:21:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-07-23 15:21:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-07-23 15:21:50,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-07-23 15:21:50,318 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-07-23 15:21:50,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:50,318 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-07-23 15:21:50,318 INFO L472 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-23 15:21:50,319 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-07-23 15:21:50,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-07-23 15:21:50,319 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:50,320 INFO L353 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-07-23 15:21:50,320 INFO L414 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:50,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-07-23 15:21:50,320 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:50,681 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 15:21:50,681 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:50,681 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-07-23 15:21:50,681 INFO L450 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-23 15:21:50,682 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-23 15:21:50,683 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:21:50,683 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-07-23 15:21:50,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:50,793 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-07-23 15:21:50,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-07-23 15:21:50,793 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-07-23 15:21:50,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:50,794 INFO L225 Difference]: With dead ends: 189 [2018-07-23 15:21:50,794 INFO L226 Difference]: Without dead ends: 187 [2018-07-23 15:21:50,795 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 15:21:50,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-07-23 15:21:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-07-23 15:21:50,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-07-23 15:21:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-07-23 15:21:50,800 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-07-23 15:21:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:50,800 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-07-23 15:21:50,800 INFO L472 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-23 15:21:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-07-23 15:21:50,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-07-23 15:21:50,801 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:50,801 INFO L353 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-07-23 15:21:50,801 INFO L414 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:50,802 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-07-23 15:21:50,802 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:51,093 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 15:21:51,093 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:51,094 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-07-23 15:21:51,094 INFO L450 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-23 15:21:51,095 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-23 15:21:51,096 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:21:51,096 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-07-23 15:21:51,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:51,223 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-07-23 15:21:51,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 15:21:51,223 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-07-23 15:21:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:51,224 INFO L225 Difference]: With dead ends: 191 [2018-07-23 15:21:51,224 INFO L226 Difference]: Without dead ends: 189 [2018-07-23 15:21:51,225 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 15:21:51,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-07-23 15:21:51,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-07-23 15:21:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-07-23 15:21:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-07-23 15:21:51,230 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-07-23 15:21:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:51,230 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-07-23 15:21:51,230 INFO L472 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-23 15:21:51,230 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-07-23 15:21:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-07-23 15:21:51,231 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:51,231 INFO L353 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-07-23 15:21:51,232 INFO L414 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:51,232 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-07-23 15:21:51,232 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:51,497 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 15:21:51,497 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:51,497 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2018-07-23 15:21:51,497 INFO L450 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-07-23 15:21:51,498 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-07-23 15:21:51,498 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:21:51,498 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-07-23 15:21:51,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:51,576 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-07-23 15:21:51,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-07-23 15:21:51,576 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-07-23 15:21:51,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:51,577 INFO L225 Difference]: With dead ends: 193 [2018-07-23 15:21:51,577 INFO L226 Difference]: Without dead ends: 191 [2018-07-23 15:21:51,578 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:21:51,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-07-23 15:21:51,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-07-23 15:21:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-07-23 15:21:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-07-23 15:21:51,583 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-07-23 15:21:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:51,583 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-07-23 15:21:51,583 INFO L472 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-07-23 15:21:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-07-23 15:21:51,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-07-23 15:21:51,584 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:51,584 INFO L353 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-07-23 15:21:51,584 INFO L414 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:51,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-07-23 15:21:51,585 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:51,899 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 15:21:51,899 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:51,899 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-07-23 15:21:51,899 INFO L450 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-23 15:21:51,900 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-23 15:21:51,900 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:21:51,900 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-07-23 15:21:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:52,001 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-07-23 15:21:52,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-23 15:21:52,001 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-07-23 15:21:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:52,002 INFO L225 Difference]: With dead ends: 195 [2018-07-23 15:21:52,002 INFO L226 Difference]: Without dead ends: 193 [2018-07-23 15:21:52,002 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 15:21:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-07-23 15:21:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-07-23 15:21:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-07-23 15:21:52,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-07-23 15:21:52,006 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-07-23 15:21:52,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:52,006 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-07-23 15:21:52,006 INFO L472 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-23 15:21:52,006 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-07-23 15:21:52,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-07-23 15:21:52,007 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:52,007 INFO L353 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-07-23 15:21:52,007 INFO L414 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:52,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-07-23 15:21:52,007 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:52,242 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 15:21:52,242 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:52,243 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-07-23 15:21:52,243 INFO L450 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-07-23 15:21:52,244 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-07-23 15:21:52,245 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:21:52,245 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-07-23 15:21:52,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:52,397 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-07-23 15:21:52,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-23 15:21:52,397 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-07-23 15:21:52,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:52,398 INFO L225 Difference]: With dead ends: 197 [2018-07-23 15:21:52,398 INFO L226 Difference]: Without dead ends: 195 [2018-07-23 15:21:52,398 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 15:21:52,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-07-23 15:21:52,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-07-23 15:21:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-07-23 15:21:52,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-07-23 15:21:52,402 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-07-23 15:21:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:52,402 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-07-23 15:21:52,402 INFO L472 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-07-23 15:21:52,402 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-07-23 15:21:52,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-07-23 15:21:52,403 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:52,403 INFO L353 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-07-23 15:21:52,403 INFO L414 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:52,403 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-07-23 15:21:52,403 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:52,631 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 15:21:52,631 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:52,631 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-07-23 15:21:52,631 INFO L450 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-07-23 15:21:52,632 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-07-23 15:21:52,633 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:21:52,633 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-07-23 15:21:52,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:52,795 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-07-23 15:21:52,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-23 15:21:52,795 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-07-23 15:21:52,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:52,796 INFO L225 Difference]: With dead ends: 199 [2018-07-23 15:21:52,796 INFO L226 Difference]: Without dead ends: 197 [2018-07-23 15:21:52,797 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:21:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-07-23 15:21:52,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-07-23 15:21:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-07-23 15:21:52,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-07-23 15:21:52,801 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-07-23 15:21:52,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:52,801 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-07-23 15:21:52,802 INFO L472 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-07-23 15:21:52,802 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-07-23 15:21:52,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-07-23 15:21:52,803 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:52,803 INFO L353 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-07-23 15:21:52,803 INFO L414 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:52,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-07-23 15:21:52,803 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:53,105 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 15:21:53,105 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:53,105 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2018-07-23 15:21:53,105 INFO L450 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-07-23 15:21:53,106 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-07-23 15:21:53,106 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:21:53,107 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-07-23 15:21:53,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:53,267 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-07-23 15:21:53,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-07-23 15:21:53,267 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-07-23 15:21:53,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:53,268 INFO L225 Difference]: With dead ends: 201 [2018-07-23 15:21:53,268 INFO L226 Difference]: Without dead ends: 199 [2018-07-23 15:21:53,269 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 15:21:53,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-07-23 15:21:53,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-07-23 15:21:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-07-23 15:21:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-07-23 15:21:53,272 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-07-23 15:21:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:53,272 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-07-23 15:21:53,272 INFO L472 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-07-23 15:21:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-07-23 15:21:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-07-23 15:21:53,273 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:53,273 INFO L353 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-07-23 15:21:53,273 INFO L414 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:53,274 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-07-23 15:21:53,274 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:53,514 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 15:21:53,514 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:53,514 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-07-23 15:21:53,514 INFO L450 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-07-23 15:21:53,515 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-07-23 15:21:53,516 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:21:53,516 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-07-23 15:21:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:53,686 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-07-23 15:21:53,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-23 15:21:53,687 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-07-23 15:21:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:53,687 INFO L225 Difference]: With dead ends: 203 [2018-07-23 15:21:53,688 INFO L226 Difference]: Without dead ends: 201 [2018-07-23 15:21:53,688 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 15:21:53,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-07-23 15:21:53,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-07-23 15:21:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-07-23 15:21:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-07-23 15:21:53,691 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-07-23 15:21:53,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:53,692 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-07-23 15:21:53,692 INFO L472 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-07-23 15:21:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-07-23 15:21:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-07-23 15:21:53,692 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:53,693 INFO L353 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-07-23 15:21:53,693 INFO L414 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:53,693 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-07-23 15:21:53,693 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:54,012 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 15:21:54,013 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:54,013 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2018-07-23 15:21:54,013 INFO L450 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-07-23 15:21:54,014 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-07-23 15:21:54,015 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:21:54,015 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-07-23 15:21:54,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:54,217 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-07-23 15:21:54,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-07-23 15:21:54,218 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-07-23 15:21:54,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:54,219 INFO L225 Difference]: With dead ends: 205 [2018-07-23 15:21:54,219 INFO L226 Difference]: Without dead ends: 203 [2018-07-23 15:21:54,219 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 15:21:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-07-23 15:21:54,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-07-23 15:21:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-07-23 15:21:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-07-23 15:21:54,224 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-07-23 15:21:54,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:54,224 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-07-23 15:21:54,225 INFO L472 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-07-23 15:21:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-07-23 15:21:54,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-07-23 15:21:54,226 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:54,226 INFO L353 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-07-23 15:21:54,226 INFO L414 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:54,227 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-07-23 15:21:54,227 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:54,526 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 15:21:54,526 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:54,527 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2018-07-23 15:21:54,527 INFO L450 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-07-23 15:21:54,528 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-07-23 15:21:54,529 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:21:54,530 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-07-23 15:21:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:54,713 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-07-23 15:21:54,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-23 15:21:54,713 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-07-23 15:21:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:54,714 INFO L225 Difference]: With dead ends: 207 [2018-07-23 15:21:54,714 INFO L226 Difference]: Without dead ends: 205 [2018-07-23 15:21:54,715 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:21:54,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-07-23 15:21:54,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-07-23 15:21:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-07-23 15:21:54,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-07-23 15:21:54,718 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-07-23 15:21:54,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:54,719 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-07-23 15:21:54,719 INFO L472 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-07-23 15:21:54,719 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-07-23 15:21:54,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-07-23 15:21:54,720 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:54,720 INFO L353 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-07-23 15:21:54,720 INFO L414 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:54,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-07-23 15:21:54,720 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:54,986 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 15:21:54,986 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:54,986 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2018-07-23 15:21:54,987 INFO L450 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-07-23 15:21:54,987 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-07-23 15:21:54,988 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:21:54,988 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-07-23 15:21:55,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:55,066 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-07-23 15:21:55,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-07-23 15:21:55,066 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-07-23 15:21:55,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:55,067 INFO L225 Difference]: With dead ends: 209 [2018-07-23 15:21:55,068 INFO L226 Difference]: Without dead ends: 207 [2018-07-23 15:21:55,069 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 15:21:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-07-23 15:21:55,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-07-23 15:21:55,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-07-23 15:21:55,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-07-23 15:21:55,073 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-07-23 15:21:55,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:55,074 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-07-23 15:21:55,074 INFO L472 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-07-23 15:21:55,074 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-07-23 15:21:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-07-23 15:21:55,075 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:55,075 INFO L353 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-07-23 15:21:55,075 INFO L414 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:55,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-07-23 15:21:55,076 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:55,337 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 15:21:55,337 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:55,337 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2018-07-23 15:21:55,338 INFO L450 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-07-23 15:21:55,339 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-07-23 15:21:55,339 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:21:55,339 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-07-23 15:21:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:55,488 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-07-23 15:21:55,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-07-23 15:21:55,489 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-07-23 15:21:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:55,490 INFO L225 Difference]: With dead ends: 211 [2018-07-23 15:21:55,490 INFO L226 Difference]: Without dead ends: 209 [2018-07-23 15:21:55,490 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:21:55,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-07-23 15:21:55,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-07-23 15:21:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-07-23 15:21:55,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-07-23 15:21:55,494 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-07-23 15:21:55,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:55,494 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-07-23 15:21:55,495 INFO L472 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-07-23 15:21:55,495 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-07-23 15:21:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-07-23 15:21:55,495 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:55,495 INFO L353 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-07-23 15:21:55,496 INFO L414 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:55,496 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-07-23 15:21:55,496 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:55,769 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 15:21:55,770 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:55,770 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2018-07-23 15:21:55,770 INFO L450 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-07-23 15:21:55,771 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-07-23 15:21:55,771 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:21:55,772 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-07-23 15:21:55,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:55,966 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-07-23 15:21:55,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-07-23 15:21:55,966 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-07-23 15:21:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:55,967 INFO L225 Difference]: With dead ends: 213 [2018-07-23 15:21:55,967 INFO L226 Difference]: Without dead ends: 211 [2018-07-23 15:21:55,969 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:21:55,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-07-23 15:21:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-07-23 15:21:55,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-07-23 15:21:55,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-07-23 15:21:55,973 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-07-23 15:21:55,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:55,974 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-07-23 15:21:55,974 INFO L472 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-07-23 15:21:55,974 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-07-23 15:21:55,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-07-23 15:21:55,975 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:55,975 INFO L353 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-07-23 15:21:55,975 INFO L414 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:55,976 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-07-23 15:21:55,976 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:56,299 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 15:21:56,299 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:56,299 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2018-07-23 15:21:56,300 INFO L450 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-07-23 15:21:56,300 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-07-23 15:21:56,301 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:21:56,301 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-07-23 15:21:56,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:56,379 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-07-23 15:21:56,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-07-23 15:21:56,380 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-07-23 15:21:56,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:56,380 INFO L225 Difference]: With dead ends: 215 [2018-07-23 15:21:56,380 INFO L226 Difference]: Without dead ends: 213 [2018-07-23 15:21:56,381 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 15:21:56,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-07-23 15:21:56,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-07-23 15:21:56,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-07-23 15:21:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-07-23 15:21:56,386 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-07-23 15:21:56,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:56,386 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-07-23 15:21:56,386 INFO L472 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-07-23 15:21:56,386 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-07-23 15:21:56,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-07-23 15:21:56,387 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:56,388 INFO L353 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-07-23 15:21:56,388 INFO L414 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:56,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-07-23 15:21:56,388 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:56,676 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 15:21:56,677 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:56,677 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2018-07-23 15:21:56,677 INFO L450 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-07-23 15:21:56,678 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-07-23 15:21:56,679 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:21:56,679 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-07-23 15:21:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:56,896 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-07-23 15:21:56,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-07-23 15:21:56,896 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-07-23 15:21:56,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:56,897 INFO L225 Difference]: With dead ends: 217 [2018-07-23 15:21:56,897 INFO L226 Difference]: Without dead ends: 215 [2018-07-23 15:21:56,897 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 15:21:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-07-23 15:21:56,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-07-23 15:21:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-07-23 15:21:56,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-07-23 15:21:56,901 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-07-23 15:21:56,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:56,901 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-07-23 15:21:56,901 INFO L472 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-07-23 15:21:56,901 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-07-23 15:21:56,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-07-23 15:21:56,902 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:56,902 INFO L353 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-07-23 15:21:56,902 INFO L414 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:56,902 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-07-23 15:21:56,903 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:57,240 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 15:21:57,240 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:57,240 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2018-07-23 15:21:57,241 INFO L450 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-07-23 15:21:57,242 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-07-23 15:21:57,242 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:21:57,242 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 108 states. [2018-07-23 15:21:57,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:57,391 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-07-23 15:21:57,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-07-23 15:21:57,391 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-07-23 15:21:57,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:57,392 INFO L225 Difference]: With dead ends: 219 [2018-07-23 15:21:57,392 INFO L226 Difference]: Without dead ends: 217 [2018-07-23 15:21:57,393 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 15:21:57,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-07-23 15:21:57,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-07-23 15:21:57,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-07-23 15:21:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-07-23 15:21:57,398 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2018-07-23 15:21:57,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:57,398 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-07-23 15:21:57,398 INFO L472 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-07-23 15:21:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-07-23 15:21:57,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-07-23 15:21:57,399 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:57,400 INFO L353 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1] [2018-07-23 15:21:57,400 INFO L414 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:57,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1219030453, now seen corresponding path program 106 times [2018-07-23 15:21:57,400 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:57,692 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 15:21:57,692 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:57,692 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2018-07-23 15:21:57,692 INFO L450 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-07-23 15:21:57,693 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-07-23 15:21:57,694 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:21:57,694 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 109 states. [2018-07-23 15:21:57,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:57,859 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-07-23 15:21:57,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-07-23 15:21:57,860 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 216 [2018-07-23 15:21:57,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:57,860 INFO L225 Difference]: With dead ends: 221 [2018-07-23 15:21:57,860 INFO L226 Difference]: Without dead ends: 219 [2018-07-23 15:21:57,861 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 15:21:57,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-07-23 15:21:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-07-23 15:21:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-07-23 15:21:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-07-23 15:21:57,865 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2018-07-23 15:21:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:57,865 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-07-23 15:21:57,865 INFO L472 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-07-23 15:21:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-07-23 15:21:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-07-23 15:21:57,866 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:57,866 INFO L353 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-07-23 15:21:57,866 INFO L414 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:57,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 107 times [2018-07-23 15:21:57,866 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:58,190 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 15:21:58,190 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:58,190 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2018-07-23 15:21:58,191 INFO L450 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-07-23 15:21:58,191 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-07-23 15:21:58,192 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:21:58,192 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 110 states. [2018-07-23 15:21:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:58,421 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-07-23 15:21:58,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-23 15:21:58,421 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-07-23 15:21:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:58,422 INFO L225 Difference]: With dead ends: 223 [2018-07-23 15:21:58,422 INFO L226 Difference]: Without dead ends: 221 [2018-07-23 15:21:58,423 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 15:21:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-07-23 15:21:58,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-07-23 15:21:58,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-07-23 15:21:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-07-23 15:21:58,427 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2018-07-23 15:21:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:58,428 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-07-23 15:21:58,428 INFO L472 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-07-23 15:21:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-07-23 15:21:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-07-23 15:21:58,429 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:58,429 INFO L353 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1] [2018-07-23 15:21:58,429 INFO L414 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:58,429 INFO L82 PathProgramCache]: Analyzing trace with hash 949720383, now seen corresponding path program 108 times [2018-07-23 15:21:58,430 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:58,934 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 15:21:58,934 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:58,934 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2018-07-23 15:21:58,935 INFO L450 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-07-23 15:21:58,935 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-07-23 15:21:58,936 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:21:58,936 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 111 states. [2018-07-23 15:21:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:59,149 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-07-23 15:21:59,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-07-23 15:21:59,149 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 220 [2018-07-23 15:21:59,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:59,150 INFO L225 Difference]: With dead ends: 225 [2018-07-23 15:21:59,150 INFO L226 Difference]: Without dead ends: 223 [2018-07-23 15:21:59,150 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 15:21:59,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-07-23 15:21:59,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-07-23 15:21:59,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-07-23 15:21:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-07-23 15:21:59,153 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2018-07-23 15:21:59,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:59,154 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-07-23 15:21:59,154 INFO L472 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-07-23 15:21:59,154 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-07-23 15:21:59,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-07-23 15:21:59,154 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:59,155 INFO L353 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1] [2018-07-23 15:21:59,155 INFO L414 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:59,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2146693895, now seen corresponding path program 109 times [2018-07-23 15:21:59,155 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:59,483 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 15:21:59,483 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:59,483 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2018-07-23 15:21:59,484 INFO L450 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-07-23 15:21:59,485 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-07-23 15:21:59,485 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:21:59,485 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 112 states. [2018-07-23 15:21:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:59,645 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-07-23 15:21:59,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-07-23 15:21:59,645 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 222 [2018-07-23 15:21:59,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:59,646 INFO L225 Difference]: With dead ends: 227 [2018-07-23 15:21:59,646 INFO L226 Difference]: Without dead ends: 225 [2018-07-23 15:21:59,646 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 15:21:59,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-07-23 15:21:59,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-07-23 15:21:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-07-23 15:21:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2018-07-23 15:21:59,650 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2018-07-23 15:21:59,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:59,651 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2018-07-23 15:21:59,651 INFO L472 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-07-23 15:21:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2018-07-23 15:21:59,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-07-23 15:21:59,652 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:59,652 INFO L353 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1] [2018-07-23 15:21:59,652 INFO L414 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:59,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1388478925, now seen corresponding path program 110 times [2018-07-23 15:21:59,653 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:59,982 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 15:21:59,982 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:59,983 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2018-07-23 15:21:59,983 INFO L450 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-07-23 15:21:59,984 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-07-23 15:21:59,984 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:21:59,985 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 113 states. [2018-07-23 15:22:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:00,123 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-07-23 15:22:00,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-07-23 15:22:00,123 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 224 [2018-07-23 15:22:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:00,124 INFO L225 Difference]: With dead ends: 229 [2018-07-23 15:22:00,124 INFO L226 Difference]: Without dead ends: 227 [2018-07-23 15:22:00,125 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 15:22:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-07-23 15:22:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-07-23 15:22:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-07-23 15:22:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-07-23 15:22:00,129 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2018-07-23 15:22:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:00,130 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-07-23 15:22:00,130 INFO L472 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-07-23 15:22:00,130 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-07-23 15:22:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-07-23 15:22:00,131 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:00,131 INFO L353 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1] [2018-07-23 15:22:00,131 INFO L414 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:00,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1406634221, now seen corresponding path program 111 times [2018-07-23 15:22:00,132 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:00,455 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 15:22:00,456 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:00,456 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2018-07-23 15:22:00,456 INFO L450 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-07-23 15:22:00,457 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-07-23 15:22:00,457 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:22:00,458 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 114 states. [2018-07-23 15:22:00,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:00,615 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2018-07-23 15:22:00,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-07-23 15:22:00,615 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 226 [2018-07-23 15:22:00,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:00,615 INFO L225 Difference]: With dead ends: 231 [2018-07-23 15:22:00,615 INFO L226 Difference]: Without dead ends: 229 [2018-07-23 15:22:00,616 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 15:22:00,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-07-23 15:22:00,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-07-23 15:22:00,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-07-23 15:22:00,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2018-07-23 15:22:00,619 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 226 [2018-07-23 15:22:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:00,619 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2018-07-23 15:22:00,619 INFO L472 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-07-23 15:22:00,619 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2018-07-23 15:22:00,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-07-23 15:22:00,620 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:00,620 INFO L353 BasicCegarLoop]: trace histogram [113, 112, 1, 1, 1] [2018-07-23 15:22:00,620 INFO L414 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:00,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1139159769, now seen corresponding path program 112 times [2018-07-23 15:22:00,621 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:00,992 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 15:22:00,992 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:00,992 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2018-07-23 15:22:00,992 INFO L450 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-07-23 15:22:00,993 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-07-23 15:22:00,994 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:22:00,994 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 115 states. [2018-07-23 15:22:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:01,184 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-07-23 15:22:01,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-07-23 15:22:01,184 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 228 [2018-07-23 15:22:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:01,184 INFO L225 Difference]: With dead ends: 233 [2018-07-23 15:22:01,184 INFO L226 Difference]: Without dead ends: 231 [2018-07-23 15:22:01,186 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 15:22:01,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-07-23 15:22:01,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-07-23 15:22:01,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-07-23 15:22:01,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-07-23 15:22:01,190 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 228 [2018-07-23 15:22:01,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:01,190 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-07-23 15:22:01,190 INFO L472 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-07-23 15:22:01,190 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-07-23 15:22:01,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-07-23 15:22:01,191 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:01,192 INFO L353 BasicCegarLoop]: trace histogram [114, 113, 1, 1, 1] [2018-07-23 15:22:01,192 INFO L414 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:01,192 INFO L82 PathProgramCache]: Analyzing trace with hash 484174561, now seen corresponding path program 113 times [2018-07-23 15:22:01,192 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:01,555 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 15:22:01,555 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:01,555 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115] total 115 [2018-07-23 15:22:01,556 INFO L450 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-07-23 15:22:01,556 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-07-23 15:22:01,557 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:22:01,557 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 116 states. [2018-07-23 15:22:01,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:01,816 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-07-23 15:22:01,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-07-23 15:22:01,816 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 230 [2018-07-23 15:22:01,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:01,817 INFO L225 Difference]: With dead ends: 235 [2018-07-23 15:22:01,817 INFO L226 Difference]: Without dead ends: 233 [2018-07-23 15:22:01,818 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 15:22:01,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-07-23 15:22:01,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-07-23 15:22:01,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-07-23 15:22:01,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-07-23 15:22:01,823 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 230 [2018-07-23 15:22:01,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:01,823 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-07-23 15:22:01,823 INFO L472 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-07-23 15:22:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-07-23 15:22:01,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-07-23 15:22:01,824 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:01,825 INFO L353 BasicCegarLoop]: trace histogram [115, 114, 1, 1, 1] [2018-07-23 15:22:01,825 INFO L414 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:01,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1435337243, now seen corresponding path program 114 times [2018-07-23 15:22:01,825 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:02,162 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 15:22:02,162 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:02,162 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2018-07-23 15:22:02,162 INFO L450 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-07-23 15:22:02,164 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-07-23 15:22:02,164 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:22:02,164 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 117 states. [2018-07-23 15:22:02,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:02,452 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-07-23 15:22:02,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-07-23 15:22:02,452 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 232 [2018-07-23 15:22:02,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:02,453 INFO L225 Difference]: With dead ends: 237 [2018-07-23 15:22:02,453 INFO L226 Difference]: Without dead ends: 235 [2018-07-23 15:22:02,455 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 15:22:02,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-07-23 15:22:02,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-07-23 15:22:02,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-07-23 15:22:02,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-07-23 15:22:02,461 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 232 [2018-07-23 15:22:02,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:02,461 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-07-23 15:22:02,461 INFO L472 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-07-23 15:22:02,461 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-07-23 15:22:02,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-07-23 15:22:02,462 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:02,462 INFO L353 BasicCegarLoop]: trace histogram [116, 115, 1, 1, 1] [2018-07-23 15:22:02,463 INFO L414 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:02,463 INFO L82 PathProgramCache]: Analyzing trace with hash 674640597, now seen corresponding path program 115 times [2018-07-23 15:22:02,463 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:02,898 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 15:22:02,898 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:02,898 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117] total 117 [2018-07-23 15:22:02,899 INFO L450 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-07-23 15:22:02,899 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-07-23 15:22:02,900 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:22:02,900 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 118 states. [2018-07-23 15:22:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:03,107 INFO L93 Difference]: Finished difference Result 239 states and 239 transitions. [2018-07-23 15:22:03,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-07-23 15:22:03,107 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 234 [2018-07-23 15:22:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:03,108 INFO L225 Difference]: With dead ends: 239 [2018-07-23 15:22:03,108 INFO L226 Difference]: Without dead ends: 237 [2018-07-23 15:22:03,109 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:22:03,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-07-23 15:22:03,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-07-23 15:22:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-07-23 15:22:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2018-07-23 15:22:03,113 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 234 [2018-07-23 15:22:03,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:03,113 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2018-07-23 15:22:03,113 INFO L472 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-07-23 15:22:03,113 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2018-07-23 15:22:03,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-07-23 15:22:03,114 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:03,115 INFO L353 BasicCegarLoop]: trace histogram [117, 116, 1, 1, 1] [2018-07-23 15:22:03,115 INFO L414 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:03,115 INFO L82 PathProgramCache]: Analyzing trace with hash -210395889, now seen corresponding path program 116 times [2018-07-23 15:22:03,115 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:03,478 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 15:22:03,479 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:03,479 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2018-07-23 15:22:03,479 INFO L450 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-07-23 15:22:03,480 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-07-23 15:22:03,481 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:22:03,481 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 119 states. [2018-07-23 15:22:03,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:03,734 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-07-23 15:22:03,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-07-23 15:22:03,734 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 236 [2018-07-23 15:22:03,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:03,734 INFO L225 Difference]: With dead ends: 241 [2018-07-23 15:22:03,735 INFO L226 Difference]: Without dead ends: 239 [2018-07-23 15:22:03,735 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 15:22:03,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-07-23 15:22:03,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-07-23 15:22:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-07-23 15:22:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-07-23 15:22:03,738 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 236 [2018-07-23 15:22:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:03,739 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-07-23 15:22:03,739 INFO L472 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-07-23 15:22:03,739 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-07-23 15:22:03,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-07-23 15:22:03,739 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:03,739 INFO L353 BasicCegarLoop]: trace histogram [118, 117, 1, 1, 1] [2018-07-23 15:22:03,740 INFO L414 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:03,740 INFO L82 PathProgramCache]: Analyzing trace with hash -326934327, now seen corresponding path program 117 times [2018-07-23 15:22:03,740 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:04,119 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 15:22:04,120 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:04,120 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119] total 119 [2018-07-23 15:22:04,120 INFO L450 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-07-23 15:22:04,121 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-07-23 15:22:04,122 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:22:04,122 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 120 states. [2018-07-23 15:22:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:04,308 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-07-23 15:22:04,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-07-23 15:22:04,308 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 238 [2018-07-23 15:22:04,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:04,309 INFO L225 Difference]: With dead ends: 243 [2018-07-23 15:22:04,309 INFO L226 Difference]: Without dead ends: 241 [2018-07-23 15:22:04,310 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:22:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-07-23 15:22:04,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-07-23 15:22:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-07-23 15:22:04,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2018-07-23 15:22:04,316 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 238 [2018-07-23 15:22:04,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:04,317 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2018-07-23 15:22:04,317 INFO L472 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-07-23 15:22:04,317 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2018-07-23 15:22:04,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-07-23 15:22:04,318 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:04,319 INFO L353 BasicCegarLoop]: trace histogram [119, 118, 1, 1, 1] [2018-07-23 15:22:04,319 INFO L414 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:04,319 INFO L82 PathProgramCache]: Analyzing trace with hash -651223549, now seen corresponding path program 118 times [2018-07-23 15:22:04,319 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:04,775 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 15:22:04,776 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:04,776 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2018-07-23 15:22:04,776 INFO L450 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-07-23 15:22:04,777 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-07-23 15:22:04,777 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:22:04,778 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 121 states. [2018-07-23 15:22:04,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:04,981 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-07-23 15:22:04,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-07-23 15:22:04,981 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 240 [2018-07-23 15:22:04,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:04,982 INFO L225 Difference]: With dead ends: 245 [2018-07-23 15:22:04,982 INFO L226 Difference]: Without dead ends: 243 [2018-07-23 15:22:04,983 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:22:04,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-07-23 15:22:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-07-23 15:22:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-07-23 15:22:04,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-07-23 15:22:04,987 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 240 [2018-07-23 15:22:04,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:04,988 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-07-23 15:22:04,988 INFO L472 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-07-23 15:22:04,988 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-07-23 15:22:04,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-07-23 15:22:04,989 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:04,989 INFO L353 BasicCegarLoop]: trace histogram [120, 119, 1, 1, 1] [2018-07-23 15:22:04,989 INFO L414 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:04,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1239446717, now seen corresponding path program 119 times [2018-07-23 15:22:04,990 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:05,341 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 15:22:05,341 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:05,341 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121] total 121 [2018-07-23 15:22:05,342 INFO L450 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-07-23 15:22:05,343 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-07-23 15:22:05,343 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:22:05,343 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 122 states. [2018-07-23 15:22:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:05,632 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-07-23 15:22:05,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-07-23 15:22:05,632 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 242 [2018-07-23 15:22:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:05,633 INFO L225 Difference]: With dead ends: 247 [2018-07-23 15:22:05,633 INFO L226 Difference]: Without dead ends: 245 [2018-07-23 15:22:05,634 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 15:22:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-07-23 15:22:05,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-07-23 15:22:05,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-07-23 15:22:05,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-07-23 15:22:05,637 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 242 [2018-07-23 15:22:05,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:05,637 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-07-23 15:22:05,637 INFO L472 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-07-23 15:22:05,637 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-07-23 15:22:05,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-07-23 15:22:05,638 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:05,638 INFO L353 BasicCegarLoop]: trace histogram [121, 120, 1, 1, 1] [2018-07-23 15:22:05,638 INFO L414 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:05,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1402406135, now seen corresponding path program 120 times [2018-07-23 15:22:05,638 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:06,025 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 15:22:06,025 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:06,025 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2018-07-23 15:22:06,025 INFO L450 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-07-23 15:22:06,027 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-07-23 15:22:06,027 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-07-23 15:22:06,027 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 123 states. [2018-07-23 15:22:06,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:06,381 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-07-23 15:22:06,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-07-23 15:22:06,381 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 244 [2018-07-23 15:22:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:06,382 INFO L225 Difference]: With dead ends: 249 [2018-07-23 15:22:06,382 INFO L226 Difference]: Without dead ends: 247 [2018-07-23 15:22:06,384 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-07-23 15:22:06,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-07-23 15:22:06,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-07-23 15:22:06,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-07-23 15:22:06,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-07-23 15:22:06,389 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 244 [2018-07-23 15:22:06,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:06,389 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-07-23 15:22:06,389 INFO L472 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-07-23 15:22:06,389 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-07-23 15:22:06,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-07-23 15:22:06,390 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:06,390 INFO L353 BasicCegarLoop]: trace histogram [122, 121, 1, 1, 1] [2018-07-23 15:22:06,391 INFO L414 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:06,391 INFO L82 PathProgramCache]: Analyzing trace with hash -907383119, now seen corresponding path program 121 times [2018-07-23 15:22:06,391 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:06,787 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 15:22:06,787 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:06,787 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123] total 123 [2018-07-23 15:22:06,788 INFO L450 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-07-23 15:22:06,789 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-07-23 15:22:06,789 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:22:06,790 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 124 states. [2018-07-23 15:22:07,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:07,128 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2018-07-23 15:22:07,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-07-23 15:22:07,129 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 246 [2018-07-23 15:22:07,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:07,130 INFO L225 Difference]: With dead ends: 251 [2018-07-23 15:22:07,130 INFO L226 Difference]: Without dead ends: 249 [2018-07-23 15:22:07,132 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:22:07,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-07-23 15:22:07,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2018-07-23 15:22:07,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-07-23 15:22:07,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2018-07-23 15:22:07,137 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 246 [2018-07-23 15:22:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:07,137 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2018-07-23 15:22:07,137 INFO L472 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-07-23 15:22:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2018-07-23 15:22:07,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-07-23 15:22:07,139 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:07,139 INFO L353 BasicCegarLoop]: trace histogram [123, 122, 1, 1, 1] [2018-07-23 15:22:07,139 INFO L414 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:07,139 INFO L82 PathProgramCache]: Analyzing trace with hash -116764181, now seen corresponding path program 122 times [2018-07-23 15:22:07,139 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:07,848 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 15:22:07,848 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:07,848 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2018-07-23 15:22:07,848 INFO L450 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-07-23 15:22:07,849 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-07-23 15:22:07,850 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:22:07,850 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand 125 states. [2018-07-23 15:22:08,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:08,164 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-07-23 15:22:08,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-07-23 15:22:08,164 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 248 [2018-07-23 15:22:08,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:08,165 INFO L225 Difference]: With dead ends: 253 [2018-07-23 15:22:08,165 INFO L226 Difference]: Without dead ends: 251 [2018-07-23 15:22:08,166 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 15:22:08,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-07-23 15:22:08,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-07-23 15:22:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-07-23 15:22:08,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-07-23 15:22:08,171 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 248 [2018-07-23 15:22:08,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:08,172 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-07-23 15:22:08,172 INFO L472 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-07-23 15:22:08,172 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-07-23 15:22:08,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-07-23 15:22:08,173 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:08,173 INFO L353 BasicCegarLoop]: trace histogram [124, 123, 1, 1, 1] [2018-07-23 15:22:08,173 INFO L414 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:08,174 INFO L82 PathProgramCache]: Analyzing trace with hash -541176155, now seen corresponding path program 123 times [2018-07-23 15:22:08,174 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:08,657 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 15:22:08,657 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:08,657 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125] total 125 [2018-07-23 15:22:08,657 INFO L450 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-07-23 15:22:08,658 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-07-23 15:22:08,659 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-07-23 15:22:08,659 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 126 states. [2018-07-23 15:22:08,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:08,809 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2018-07-23 15:22:08,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-07-23 15:22:08,810 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 250 [2018-07-23 15:22:08,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:08,810 INFO L225 Difference]: With dead ends: 255 [2018-07-23 15:22:08,810 INFO L226 Difference]: Without dead ends: 253 [2018-07-23 15:22:08,812 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-07-23 15:22:08,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-07-23 15:22:08,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-07-23 15:22:08,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-07-23 15:22:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2018-07-23 15:22:08,817 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 250 [2018-07-23 15:22:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:08,817 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2018-07-23 15:22:08,817 INFO L472 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-07-23 15:22:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2018-07-23 15:22:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-07-23 15:22:08,819 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:08,819 INFO L353 BasicCegarLoop]: trace histogram [125, 124, 1, 1, 1] [2018-07-23 15:22:08,819 INFO L414 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:08,819 INFO L82 PathProgramCache]: Analyzing trace with hash -379190049, now seen corresponding path program 124 times [2018-07-23 15:22:08,819 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:09,238 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 15:22:09,239 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:09,239 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126] total 126 [2018-07-23 15:22:09,239 INFO L450 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-07-23 15:22:09,240 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-07-23 15:22:09,241 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:22:09,241 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 127 states. [2018-07-23 15:22:09,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:09,645 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-07-23 15:22:09,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-07-23 15:22:09,645 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 252 [2018-07-23 15:22:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:09,646 INFO L225 Difference]: With dead ends: 257 [2018-07-23 15:22:09,646 INFO L226 Difference]: Without dead ends: 255 [2018-07-23 15:22:09,647 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:22:09,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-07-23 15:22:09,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-07-23 15:22:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-07-23 15:22:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-07-23 15:22:09,651 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 252 [2018-07-23 15:22:09,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:09,651 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-07-23 15:22:09,651 INFO L472 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-07-23 15:22:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-07-23 15:22:09,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-07-23 15:22:09,652 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:09,652 INFO L353 BasicCegarLoop]: trace histogram [126, 125, 1, 1, 1] [2018-07-23 15:22:09,652 INFO L414 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:09,652 INFO L82 PathProgramCache]: Analyzing trace with hash 670635161, now seen corresponding path program 125 times [2018-07-23 15:22:09,652 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:10,114 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 15:22:10,115 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:10,115 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127] total 127 [2018-07-23 15:22:10,115 INFO L450 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-07-23 15:22:10,117 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-07-23 15:22:10,117 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:22:10,118 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 128 states. [2018-07-23 15:22:10,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:10,329 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-07-23 15:22:10,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-07-23 15:22:10,329 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 254 [2018-07-23 15:22:10,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:10,329 INFO L225 Difference]: With dead ends: 259 [2018-07-23 15:22:10,329 INFO L226 Difference]: Without dead ends: 257 [2018-07-23 15:22:10,330 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 15:22:10,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-07-23 15:22:10,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2018-07-23 15:22:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-07-23 15:22:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2018-07-23 15:22:10,335 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 254 [2018-07-23 15:22:10,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:10,336 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2018-07-23 15:22:10,336 INFO L472 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-07-23 15:22:10,336 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2018-07-23 15:22:10,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-07-23 15:22:10,337 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:10,337 INFO L353 BasicCegarLoop]: trace histogram [127, 126, 1, 1, 1] [2018-07-23 15:22:10,337 INFO L414 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:10,337 INFO L82 PathProgramCache]: Analyzing trace with hash 235347411, now seen corresponding path program 126 times [2018-07-23 15:22:10,338 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:10,793 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 15:22:10,794 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:10,794 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128] total 128 [2018-07-23 15:22:10,794 INFO L450 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-07-23 15:22:10,795 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-07-23 15:22:10,796 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-07-23 15:22:10,796 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 129 states. [2018-07-23 15:22:11,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:11,188 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-07-23 15:22:11,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-07-23 15:22:11,188 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 256 [2018-07-23 15:22:11,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:11,189 INFO L225 Difference]: With dead ends: 261 [2018-07-23 15:22:11,189 INFO L226 Difference]: Without dead ends: 259 [2018-07-23 15:22:11,190 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 15:22:11,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-07-23 15:22:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-07-23 15:22:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-07-23 15:22:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2018-07-23 15:22:11,194 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 256 [2018-07-23 15:22:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:11,195 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2018-07-23 15:22:11,195 INFO L472 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-07-23 15:22:11,195 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2018-07-23 15:22:11,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-07-23 15:22:11,196 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:11,196 INFO L353 BasicCegarLoop]: trace histogram [128, 127, 1, 1, 1] [2018-07-23 15:22:11,196 INFO L414 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1464352627, now seen corresponding path program 127 times [2018-07-23 15:22:11,197 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:11,760 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 15:22:11,761 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:11,761 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129] total 129 [2018-07-23 15:22:11,761 INFO L450 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-07-23 15:22:11,763 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-07-23 15:22:11,764 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:22:11,764 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 130 states. [2018-07-23 15:22:11,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:11,896 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2018-07-23 15:22:11,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-07-23 15:22:11,897 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 258 [2018-07-23 15:22:11,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:11,898 INFO L225 Difference]: With dead ends: 263 [2018-07-23 15:22:11,898 INFO L226 Difference]: Without dead ends: 261 [2018-07-23 15:22:11,899 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:22:11,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-07-23 15:22:11,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-07-23 15:22:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-07-23 15:22:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2018-07-23 15:22:11,903 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 258 [2018-07-23 15:22:11,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:11,904 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2018-07-23 15:22:11,904 INFO L472 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-07-23 15:22:11,904 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2018-07-23 15:22:11,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-07-23 15:22:11,905 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:11,905 INFO L353 BasicCegarLoop]: trace histogram [129, 128, 1, 1, 1] [2018-07-23 15:22:11,905 INFO L414 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:11,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1506450631, now seen corresponding path program 128 times [2018-07-23 15:22:11,906 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:12,322 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 15:22:12,322 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:12,323 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130] total 130 [2018-07-23 15:22:12,323 INFO L450 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-07-23 15:22:12,324 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-07-23 15:22:12,325 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-07-23 15:22:12,325 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand 131 states. [2018-07-23 15:22:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:12,657 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-07-23 15:22:12,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-07-23 15:22:12,658 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 260 [2018-07-23 15:22:12,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:12,658 INFO L225 Difference]: With dead ends: 265 [2018-07-23 15:22:12,658 INFO L226 Difference]: Without dead ends: 263 [2018-07-23 15:22:12,660 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 15:22:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-07-23 15:22:12,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-07-23 15:22:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-07-23 15:22:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-07-23 15:22:12,663 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 260 [2018-07-23 15:22:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:12,663 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-07-23 15:22:12,663 INFO L472 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-07-23 15:22:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-07-23 15:22:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-07-23 15:22:12,664 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:12,665 INFO L353 BasicCegarLoop]: trace histogram [130, 129, 1, 1, 1] [2018-07-23 15:22:12,665 INFO L414 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:12,665 INFO L82 PathProgramCache]: Analyzing trace with hash 295129729, now seen corresponding path program 129 times [2018-07-23 15:22:12,665 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:13,162 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 15:22:13,163 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:13,163 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131] total 131 [2018-07-23 15:22:13,163 INFO L450 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-07-23 15:22:13,164 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-07-23 15:22:13,165 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-07-23 15:22:13,166 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 132 states. [2018-07-23 15:22:13,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:13,565 INFO L93 Difference]: Finished difference Result 267 states and 267 transitions. [2018-07-23 15:22:13,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-07-23 15:22:13,565 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 262 [2018-07-23 15:22:13,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:13,566 INFO L225 Difference]: With dead ends: 267 [2018-07-23 15:22:13,566 INFO L226 Difference]: Without dead ends: 265 [2018-07-23 15:22:13,568 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 15:22:13,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-07-23 15:22:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2018-07-23 15:22:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-07-23 15:22:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2018-07-23 15:22:13,572 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 262 [2018-07-23 15:22:13,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:13,572 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2018-07-23 15:22:13,573 INFO L472 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-07-23 15:22:13,573 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2018-07-23 15:22:13,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-07-23 15:22:13,574 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:13,574 INFO L353 BasicCegarLoop]: trace histogram [131, 130, 1, 1, 1] [2018-07-23 15:22:13,574 INFO L414 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:13,574 INFO L82 PathProgramCache]: Analyzing trace with hash 151880123, now seen corresponding path program 130 times [2018-07-23 15:22:13,574 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:14,054 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 15:22:14,054 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:14,054 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132] total 132 [2018-07-23 15:22:14,055 INFO L450 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-07-23 15:22:14,056 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-07-23 15:22:14,057 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-07-23 15:22:14,057 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand 133 states. [2018-07-23 15:22:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:14,265 INFO L93 Difference]: Finished difference Result 269 states and 269 transitions. [2018-07-23 15:22:14,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-07-23 15:22:14,265 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 264 [2018-07-23 15:22:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:14,266 INFO L225 Difference]: With dead ends: 269 [2018-07-23 15:22:14,266 INFO L226 Difference]: Without dead ends: 267 [2018-07-23 15:22:14,267 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 15:22:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-07-23 15:22:14,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-07-23 15:22:14,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-07-23 15:22:14,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2018-07-23 15:22:14,270 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 264 [2018-07-23 15:22:14,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:14,270 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2018-07-23 15:22:14,271 INFO L472 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-07-23 15:22:14,271 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2018-07-23 15:22:14,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-07-23 15:22:14,271 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:14,271 INFO L353 BasicCegarLoop]: trace histogram [132, 131, 1, 1, 1] [2018-07-23 15:22:14,272 INFO L414 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:14,272 INFO L82 PathProgramCache]: Analyzing trace with hash -72037771, now seen corresponding path program 131 times [2018-07-23 15:22:14,272 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:14,748 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 15:22:14,748 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:14,748 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133] total 133 [2018-07-23 15:22:14,748 INFO L450 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-07-23 15:22:14,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-07-23 15:22:14,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-07-23 15:22:14,750 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 134 states. [2018-07-23 15:22:15,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:15,144 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2018-07-23 15:22:15,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-07-23 15:22:15,144 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 266 [2018-07-23 15:22:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:15,145 INFO L225 Difference]: With dead ends: 271 [2018-07-23 15:22:15,145 INFO L226 Difference]: Without dead ends: 269 [2018-07-23 15:22:15,146 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 15:22:15,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-07-23 15:22:15,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2018-07-23 15:22:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-07-23 15:22:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2018-07-23 15:22:15,151 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 266 [2018-07-23 15:22:15,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:15,151 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2018-07-23 15:22:15,151 INFO L472 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-07-23 15:22:15,151 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2018-07-23 15:22:15,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-07-23 15:22:15,152 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:15,153 INFO L353 BasicCegarLoop]: trace histogram [133, 132, 1, 1, 1] [2018-07-23 15:22:15,153 INFO L414 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:15,153 INFO L82 PathProgramCache]: Analyzing trace with hash -508769105, now seen corresponding path program 132 times [2018-07-23 15:22:15,153 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:15,621 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 15:22:15,621 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:15,621 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134] total 134 [2018-07-23 15:22:15,621 INFO L450 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-07-23 15:22:15,623 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-07-23 15:22:15,623 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-07-23 15:22:15,624 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand 135 states. [2018-07-23 15:22:16,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:16,116 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-07-23 15:22:16,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-07-23 15:22:16,116 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 268 [2018-07-23 15:22:16,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:16,117 INFO L225 Difference]: With dead ends: 273 [2018-07-23 15:22:16,117 INFO L226 Difference]: Without dead ends: 271 [2018-07-23 15:22:16,118 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 15:22:16,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-07-23 15:22:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-07-23 15:22:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-07-23 15:22:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2018-07-23 15:22:16,121 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 268 [2018-07-23 15:22:16,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:16,121 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2018-07-23 15:22:16,122 INFO L472 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-07-23 15:22:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2018-07-23 15:22:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-07-23 15:22:16,122 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:16,122 INFO L353 BasicCegarLoop]: trace histogram [134, 133, 1, 1, 1] [2018-07-23 15:22:16,122 INFO L414 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:16,123 INFO L82 PathProgramCache]: Analyzing trace with hash 699213929, now seen corresponding path program 133 times [2018-07-23 15:22:16,123 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:16,571 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 15:22:16,571 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:16,571 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135] total 135 [2018-07-23 15:22:16,572 INFO L450 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-07-23 15:22:16,574 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-07-23 15:22:16,575 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:22:16,575 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 136 states. [2018-07-23 15:22:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:16,867 INFO L93 Difference]: Finished difference Result 275 states and 275 transitions. [2018-07-23 15:22:16,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-07-23 15:22:16,867 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 270 [2018-07-23 15:22:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:16,868 INFO L225 Difference]: With dead ends: 275 [2018-07-23 15:22:16,868 INFO L226 Difference]: Without dead ends: 273 [2018-07-23 15:22:16,869 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 15:22:16,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-07-23 15:22:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2018-07-23 15:22:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-07-23 15:22:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2018-07-23 15:22:16,874 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 270 [2018-07-23 15:22:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:16,874 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2018-07-23 15:22:16,874 INFO L472 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-07-23 15:22:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2018-07-23 15:22:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-07-23 15:22:16,875 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:16,876 INFO L353 BasicCegarLoop]: trace histogram [135, 134, 1, 1, 1] [2018-07-23 15:22:16,876 INFO L414 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:16,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1929739683, now seen corresponding path program 134 times [2018-07-23 15:22:16,876 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:17,467 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 15:22:17,468 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:17,468 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136] total 136 [2018-07-23 15:22:17,468 INFO L450 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-07-23 15:22:17,469 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-07-23 15:22:17,470 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-07-23 15:22:17,471 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand 137 states. [2018-07-23 15:22:17,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:17,646 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-07-23 15:22:17,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-07-23 15:22:17,646 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 272 [2018-07-23 15:22:17,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:17,647 INFO L225 Difference]: With dead ends: 277 [2018-07-23 15:22:17,647 INFO L226 Difference]: Without dead ends: 275 [2018-07-23 15:22:17,649 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-07-23 15:22:17,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-07-23 15:22:17,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-07-23 15:22:17,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-07-23 15:22:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-07-23 15:22:17,654 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 272 [2018-07-23 15:22:17,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:17,655 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-07-23 15:22:17,655 INFO L472 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-07-23 15:22:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-07-23 15:22:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-07-23 15:22:17,656 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:17,656 INFO L353 BasicCegarLoop]: trace histogram [136, 135, 1, 1, 1] [2018-07-23 15:22:17,656 INFO L414 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:17,657 INFO L82 PathProgramCache]: Analyzing trace with hash -945984419, now seen corresponding path program 135 times [2018-07-23 15:22:17,657 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:18,264 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 15:22:18,265 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:18,265 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137] total 137 [2018-07-23 15:22:18,265 INFO L450 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-07-23 15:22:18,266 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-07-23 15:22:18,267 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:22:18,267 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 138 states. [2018-07-23 15:22:18,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:18,736 INFO L93 Difference]: Finished difference Result 279 states and 279 transitions. [2018-07-23 15:22:18,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-07-23 15:22:18,736 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 274 [2018-07-23 15:22:18,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:18,737 INFO L225 Difference]: With dead ends: 279 [2018-07-23 15:22:18,737 INFO L226 Difference]: Without dead ends: 277 [2018-07-23 15:22:18,739 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:22:18,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-07-23 15:22:18,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2018-07-23 15:22:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-07-23 15:22:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2018-07-23 15:22:18,743 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 274 [2018-07-23 15:22:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:18,743 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2018-07-23 15:22:18,743 INFO L472 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-07-23 15:22:18,743 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2018-07-23 15:22:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-07-23 15:22:18,744 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:18,744 INFO L353 BasicCegarLoop]: trace histogram [137, 136, 1, 1, 1] [2018-07-23 15:22:18,745 INFO L414 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:18,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1442092183, now seen corresponding path program 136 times [2018-07-23 15:22:18,745 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:19,293 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 15:22:19,293 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:19,293 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138] total 138 [2018-07-23 15:22:19,294 INFO L450 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-07-23 15:22:19,296 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-07-23 15:22:19,297 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 15:22:19,297 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 139 states. [2018-07-23 15:22:19,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:19,779 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2018-07-23 15:22:19,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-07-23 15:22:19,780 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 276 [2018-07-23 15:22:19,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:19,780 INFO L225 Difference]: With dead ends: 281 [2018-07-23 15:22:19,780 INFO L226 Difference]: Without dead ends: 279 [2018-07-23 15:22:19,782 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 15:22:19,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-07-23 15:22:19,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-07-23 15:22:19,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-07-23 15:22:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2018-07-23 15:22:19,785 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 276 [2018-07-23 15:22:19,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:19,785 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2018-07-23 15:22:19,786 INFO L472 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-07-23 15:22:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2018-07-23 15:22:19,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-07-23 15:22:19,787 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:19,787 INFO L353 BasicCegarLoop]: trace histogram [138, 137, 1, 1, 1] [2018-07-23 15:22:19,787 INFO L414 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:19,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1423796655, now seen corresponding path program 137 times [2018-07-23 15:22:19,788 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:20,369 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 15:22:20,369 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:20,369 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139] total 139 [2018-07-23 15:22:20,370 INFO L450 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-07-23 15:22:20,371 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-07-23 15:22:20,373 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:22:20,373 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand 140 states. [2018-07-23 15:22:20,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:20,935 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2018-07-23 15:22:20,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-07-23 15:22:20,935 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 278 [2018-07-23 15:22:20,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:20,936 INFO L225 Difference]: With dead ends: 283 [2018-07-23 15:22:20,936 INFO L226 Difference]: Without dead ends: 281 [2018-07-23 15:22:20,937 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:22:20,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-07-23 15:22:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2018-07-23 15:22:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-07-23 15:22:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2018-07-23 15:22:20,941 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 278 [2018-07-23 15:22:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:20,941 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2018-07-23 15:22:20,941 INFO L472 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-07-23 15:22:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2018-07-23 15:22:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-07-23 15:22:20,943 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:20,943 INFO L353 BasicCegarLoop]: trace histogram [139, 138, 1, 1, 1] [2018-07-23 15:22:20,943 INFO L414 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:20,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1826034059, now seen corresponding path program 138 times [2018-07-23 15:22:20,943 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:21,557 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 15:22:21,557 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:21,557 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140] total 140 [2018-07-23 15:22:21,558 INFO L450 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-07-23 15:22:21,559 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-07-23 15:22:21,560 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-07-23 15:22:21,560 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand 141 states. [2018-07-23 15:22:22,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:22,176 INFO L93 Difference]: Finished difference Result 285 states and 285 transitions. [2018-07-23 15:22:22,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-07-23 15:22:22,177 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 280 [2018-07-23 15:22:22,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:22,177 INFO L225 Difference]: With dead ends: 285 [2018-07-23 15:22:22,177 INFO L226 Difference]: Without dead ends: 283 [2018-07-23 15:22:22,179 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 15:22:22,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-07-23 15:22:22,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-07-23 15:22:22,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-07-23 15:22:22,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2018-07-23 15:22:22,182 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 280 [2018-07-23 15:22:22,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:22,183 INFO L471 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2018-07-23 15:22:22,183 INFO L472 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-07-23 15:22:22,183 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2018-07-23 15:22:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-07-23 15:22:22,183 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:22,184 INFO L353 BasicCegarLoop]: trace histogram [140, 139, 1, 1, 1] [2018-07-23 15:22:22,184 INFO L414 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:22,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1822841275, now seen corresponding path program 139 times [2018-07-23 15:22:22,184 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:22,763 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 15:22:22,763 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:22,764 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141] total 141 [2018-07-23 15:22:22,764 INFO L450 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-07-23 15:22:22,765 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-07-23 15:22:22,766 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:22:22,767 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 142 states. [2018-07-23 15:22:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:23,291 INFO L93 Difference]: Finished difference Result 287 states and 287 transitions. [2018-07-23 15:22:23,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-07-23 15:22:23,291 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 282 [2018-07-23 15:22:23,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:23,292 INFO L225 Difference]: With dead ends: 287 [2018-07-23 15:22:23,292 INFO L226 Difference]: Without dead ends: 285 [2018-07-23 15:22:23,293 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 15:22:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-07-23 15:22:23,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2018-07-23 15:22:23,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-07-23 15:22:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 285 transitions. [2018-07-23 15:22:23,296 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 285 transitions. Word has length 282 [2018-07-23 15:22:23,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:23,296 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 285 transitions. [2018-07-23 15:22:23,296 INFO L472 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-07-23 15:22:23,296 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 285 transitions. [2018-07-23 15:22:23,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-07-23 15:22:23,297 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:23,297 INFO L353 BasicCegarLoop]: trace histogram [141, 140, 1, 1, 1] [2018-07-23 15:22:23,297 INFO L414 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:23,297 INFO L82 PathProgramCache]: Analyzing trace with hash 596243583, now seen corresponding path program 140 times [2018-07-23 15:22:23,297 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:23,812 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 15:22:23,813 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:23,813 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142] total 142 [2018-07-23 15:22:23,813 INFO L450 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-07-23 15:22:23,814 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-07-23 15:22:23,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-07-23 15:22:23,815 INFO L87 Difference]: Start difference. First operand 285 states and 285 transitions. Second operand 143 states. [2018-07-23 15:22:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:24,312 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-07-23 15:22:24,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-07-23 15:22:24,312 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 284 [2018-07-23 15:22:24,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:24,313 INFO L225 Difference]: With dead ends: 289 [2018-07-23 15:22:24,313 INFO L226 Difference]: Without dead ends: 287 [2018-07-23 15:22:24,315 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 15:22:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-07-23 15:22:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-07-23 15:22:24,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-07-23 15:22:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-07-23 15:22:24,319 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 284 [2018-07-23 15:22:24,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:24,320 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-07-23 15:22:24,320 INFO L472 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-07-23 15:22:24,320 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-07-23 15:22:24,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-07-23 15:22:24,321 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:24,321 INFO L353 BasicCegarLoop]: trace histogram [142, 141, 1, 1, 1] [2018-07-23 15:22:24,321 INFO L414 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:24,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1759484985, now seen corresponding path program 141 times [2018-07-23 15:22:24,322 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:24,916 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 15:22:24,916 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:24,916 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143] total 143 [2018-07-23 15:22:24,917 INFO L450 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-07-23 15:22:24,918 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-07-23 15:22:24,919 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-07-23 15:22:24,920 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 144 states. [2018-07-23 15:22:25,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:25,509 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2018-07-23 15:22:25,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-07-23 15:22:25,509 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 286 [2018-07-23 15:22:25,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:25,510 INFO L225 Difference]: With dead ends: 291 [2018-07-23 15:22:25,510 INFO L226 Difference]: Without dead ends: 289 [2018-07-23 15:22:25,512 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 15:22:25,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-07-23 15:22:25,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2018-07-23 15:22:25,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-07-23 15:22:25,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 289 transitions. [2018-07-23 15:22:25,516 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 289 transitions. Word has length 286 [2018-07-23 15:22:25,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:25,516 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 289 transitions. [2018-07-23 15:22:25,516 INFO L472 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-07-23 15:22:25,516 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 289 transitions. [2018-07-23 15:22:25,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-07-23 15:22:25,517 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:25,517 INFO L353 BasicCegarLoop]: trace histogram [143, 142, 1, 1, 1] [2018-07-23 15:22:25,517 INFO L414 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:25,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1351991949, now seen corresponding path program 142 times [2018-07-23 15:22:25,518 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:26,389 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 15:22:26,390 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:26,390 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144] total 144 [2018-07-23 15:22:26,390 INFO L450 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-07-23 15:22:26,392 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-07-23 15:22:26,394 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 15:22:26,395 INFO L87 Difference]: Start difference. First operand 289 states and 289 transitions. Second operand 145 states. [2018-07-23 15:22:27,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:27,164 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2018-07-23 15:22:27,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-07-23 15:22:27,164 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 288 [2018-07-23 15:22:27,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:27,165 INFO L225 Difference]: With dead ends: 293 [2018-07-23 15:22:27,165 INFO L226 Difference]: Without dead ends: 291 [2018-07-23 15:22:27,167 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 15:22:27,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-07-23 15:22:27,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-07-23 15:22:27,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-07-23 15:22:27,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2018-07-23 15:22:27,170 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 288 [2018-07-23 15:22:27,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:27,170 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2018-07-23 15:22:27,170 INFO L472 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-07-23 15:22:27,170 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2018-07-23 15:22:27,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-07-23 15:22:27,171 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:27,171 INFO L353 BasicCegarLoop]: trace histogram [144, 143, 1, 1, 1] [2018-07-23 15:22:27,171 INFO L414 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:27,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2110879789, now seen corresponding path program 143 times [2018-07-23 15:22:27,171 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:27,855 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 15:22:27,856 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:27,856 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145] total 145 [2018-07-23 15:22:27,856 INFO L450 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-07-23 15:22:27,859 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-07-23 15:22:27,860 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:22:27,860 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand 146 states. [2018-07-23 15:22:28,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:28,252 INFO L93 Difference]: Finished difference Result 295 states and 295 transitions. [2018-07-23 15:22:28,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-07-23 15:22:28,253 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 290 [2018-07-23 15:22:28,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:28,253 INFO L225 Difference]: With dead ends: 295 [2018-07-23 15:22:28,253 INFO L226 Difference]: Without dead ends: 293 [2018-07-23 15:22:28,255 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:22:28,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-07-23 15:22:28,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2018-07-23 15:22:28,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-07-23 15:22:28,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2018-07-23 15:22:28,257 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 290 [2018-07-23 15:22:28,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:28,258 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2018-07-23 15:22:28,258 INFO L472 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-07-23 15:22:28,258 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2018-07-23 15:22:28,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-07-23 15:22:28,259 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:28,259 INFO L353 BasicCegarLoop]: trace histogram [145, 144, 1, 1, 1] [2018-07-23 15:22:28,260 INFO L414 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:28,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1330965607, now seen corresponding path program 144 times [2018-07-23 15:22:28,260 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:28,921 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 15:22:28,922 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:28,922 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146] total 146 [2018-07-23 15:22:28,922 INFO L450 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-07-23 15:22:28,924 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-07-23 15:22:28,924 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-07-23 15:22:28,925 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 147 states. [2018-07-23 15:22:29,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:29,135 INFO L93 Difference]: Finished difference Result 297 states and 297 transitions. [2018-07-23 15:22:29,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-07-23 15:22:29,135 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 292 [2018-07-23 15:22:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:29,136 INFO L225 Difference]: With dead ends: 297 [2018-07-23 15:22:29,136 INFO L226 Difference]: Without dead ends: 295 [2018-07-23 15:22:29,137 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-07-23 15:22:29,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-07-23 15:22:29,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-07-23 15:22:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-07-23 15:22:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2018-07-23 15:22:29,140 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 292 [2018-07-23 15:22:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:29,140 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2018-07-23 15:22:29,140 INFO L472 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-07-23 15:22:29,140 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2018-07-23 15:22:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-07-23 15:22:29,141 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:29,142 INFO L353 BasicCegarLoop]: trace histogram [146, 145, 1, 1, 1] [2018-07-23 15:22:29,142 INFO L414 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:29,142 INFO L82 PathProgramCache]: Analyzing trace with hash -842253791, now seen corresponding path program 145 times [2018-07-23 15:22:29,142 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:29,726 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 15:22:29,727 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:29,727 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147] total 147 [2018-07-23 15:22:29,728 INFO L450 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-07-23 15:22:29,730 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-07-23 15:22:29,731 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:22:29,731 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand 148 states. [2018-07-23 15:22:30,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:30,337 INFO L93 Difference]: Finished difference Result 299 states and 299 transitions. [2018-07-23 15:22:30,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-07-23 15:22:30,337 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 294 [2018-07-23 15:22:30,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:30,338 INFO L225 Difference]: With dead ends: 299 [2018-07-23 15:22:30,338 INFO L226 Difference]: Without dead ends: 297 [2018-07-23 15:22:30,340 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 15:22:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-07-23 15:22:30,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2018-07-23 15:22:30,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-07-23 15:22:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2018-07-23 15:22:30,344 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 294 [2018-07-23 15:22:30,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:30,344 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2018-07-23 15:22:30,344 INFO L472 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-07-23 15:22:30,344 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2018-07-23 15:22:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-07-23 15:22:30,345 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:30,345 INFO L353 BasicCegarLoop]: trace histogram [147, 146, 1, 1, 1] [2018-07-23 15:22:30,345 INFO L414 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:30,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1951989413, now seen corresponding path program 146 times [2018-07-23 15:22:30,345 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:30,919 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 15:22:30,919 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:30,920 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148] total 148 [2018-07-23 15:22:30,920 INFO L450 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-07-23 15:22:30,921 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-07-23 15:22:30,922 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-07-23 15:22:30,922 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand 149 states. [2018-07-23 15:22:31,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:31,623 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-07-23 15:22:31,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-07-23 15:22:31,623 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 296 [2018-07-23 15:22:31,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:31,624 INFO L225 Difference]: With dead ends: 301 [2018-07-23 15:22:31,624 INFO L226 Difference]: Without dead ends: 299 [2018-07-23 15:22:31,627 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 15:22:31,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-07-23 15:22:31,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-07-23 15:22:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-07-23 15:22:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2018-07-23 15:22:31,631 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 296 [2018-07-23 15:22:31,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:31,631 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2018-07-23 15:22:31,632 INFO L472 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-07-23 15:22:31,632 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2018-07-23 15:22:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-07-23 15:22:31,633 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:31,633 INFO L353 BasicCegarLoop]: trace histogram [148, 147, 1, 1, 1] [2018-07-23 15:22:31,633 INFO L414 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1038934549, now seen corresponding path program 147 times [2018-07-23 15:22:31,634 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:32,418 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 15:22:32,418 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:32,418 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149] total 149 [2018-07-23 15:22:32,419 INFO L450 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-07-23 15:22:32,421 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-07-23 15:22:32,422 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-07-23 15:22:32,422 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 150 states. [2018-07-23 15:22:33,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:33,143 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2018-07-23 15:22:33,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-07-23 15:22:33,144 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 298 [2018-07-23 15:22:33,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:33,144 INFO L225 Difference]: With dead ends: 303 [2018-07-23 15:22:33,144 INFO L226 Difference]: Without dead ends: 301 [2018-07-23 15:22:33,146 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 15:22:33,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-07-23 15:22:33,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2018-07-23 15:22:33,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-07-23 15:22:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 301 transitions. [2018-07-23 15:22:33,149 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 301 transitions. Word has length 298 [2018-07-23 15:22:33,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:33,149 INFO L471 AbstractCegarLoop]: Abstraction has 301 states and 301 transitions. [2018-07-23 15:22:33,149 INFO L472 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-07-23 15:22:33,149 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 301 transitions. [2018-07-23 15:22:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-07-23 15:22:33,150 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:33,150 INFO L353 BasicCegarLoop]: trace histogram [149, 148, 1, 1, 1] [2018-07-23 15:22:33,150 INFO L414 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:33,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1983741007, now seen corresponding path program 148 times [2018-07-23 15:22:33,150 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:33,840 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 15:22:33,841 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:33,841 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150] total 150 [2018-07-23 15:22:33,841 INFO L450 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-07-23 15:22:33,843 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-07-23 15:22:33,844 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-07-23 15:22:33,844 INFO L87 Difference]: Start difference. First operand 301 states and 301 transitions. Second operand 151 states. [2018-07-23 15:22:34,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:34,093 INFO L93 Difference]: Finished difference Result 305 states and 305 transitions. [2018-07-23 15:22:34,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-07-23 15:22:34,093 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 300 [2018-07-23 15:22:34,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:34,094 INFO L225 Difference]: With dead ends: 305 [2018-07-23 15:22:34,094 INFO L226 Difference]: Without dead ends: 303 [2018-07-23 15:22:34,096 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-07-23 15:22:34,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-07-23 15:22:34,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-07-23 15:22:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-07-23 15:22:34,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2018-07-23 15:22:34,099 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 300 [2018-07-23 15:22:34,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:34,099 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2018-07-23 15:22:34,099 INFO L472 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-07-23 15:22:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2018-07-23 15:22:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-07-23 15:22:34,100 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:34,100 INFO L353 BasicCegarLoop]: trace histogram [150, 149, 1, 1, 1] [2018-07-23 15:22:34,100 INFO L414 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:34,100 INFO L82 PathProgramCache]: Analyzing trace with hash -590319607, now seen corresponding path program 149 times [2018-07-23 15:22:34,100 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:34,785 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 15:22:34,786 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:34,786 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151] total 151 [2018-07-23 15:22:34,786 INFO L450 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-07-23 15:22:34,789 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-07-23 15:22:34,790 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:22:34,791 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand 152 states. [2018-07-23 15:22:35,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:35,737 INFO L93 Difference]: Finished difference Result 307 states and 307 transitions. [2018-07-23 15:22:35,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-07-23 15:22:35,738 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 302 [2018-07-23 15:22:35,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:35,739 INFO L225 Difference]: With dead ends: 307 [2018-07-23 15:22:35,739 INFO L226 Difference]: Without dead ends: 305 [2018-07-23 15:22:35,741 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 15:22:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-07-23 15:22:35,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2018-07-23 15:22:35,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-07-23 15:22:35,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 305 transitions. [2018-07-23 15:22:35,746 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 305 transitions. Word has length 302 [2018-07-23 15:22:35,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:35,746 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 305 transitions. [2018-07-23 15:22:35,746 INFO L472 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-07-23 15:22:35,746 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 305 transitions. [2018-07-23 15:22:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-07-23 15:22:35,747 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:35,748 INFO L353 BasicCegarLoop]: trace histogram [151, 150, 1, 1, 1] [2018-07-23 15:22:35,748 INFO L414 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:35,748 INFO L82 PathProgramCache]: Analyzing trace with hash -361407165, now seen corresponding path program 150 times [2018-07-23 15:22:35,748 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:36,367 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 15:22:36,367 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:36,367 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152] total 152 [2018-07-23 15:22:36,368 INFO L450 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-07-23 15:22:36,369 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-07-23 15:22:36,371 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-07-23 15:22:36,371 INFO L87 Difference]: Start difference. First operand 305 states and 305 transitions. Second operand 153 states. [2018-07-23 15:22:37,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:37,070 INFO L93 Difference]: Finished difference Result 309 states and 309 transitions. [2018-07-23 15:22:37,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-07-23 15:22:37,071 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 304 [2018-07-23 15:22:37,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:37,071 INFO L225 Difference]: With dead ends: 309 [2018-07-23 15:22:37,071 INFO L226 Difference]: Without dead ends: 307 [2018-07-23 15:22:37,073 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 15:22:37,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-07-23 15:22:37,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-07-23 15:22:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-07-23 15:22:37,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2018-07-23 15:22:37,076 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 304 [2018-07-23 15:22:37,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:37,076 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2018-07-23 15:22:37,076 INFO L472 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-07-23 15:22:37,076 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2018-07-23 15:22:37,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-07-23 15:22:37,077 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:37,077 INFO L353 BasicCegarLoop]: trace histogram [152, 151, 1, 1, 1] [2018-07-23 15:22:37,077 INFO L414 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:37,077 INFO L82 PathProgramCache]: Analyzing trace with hash 580117501, now seen corresponding path program 151 times [2018-07-23 15:22:37,077 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:37,696 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 15:22:37,697 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:37,697 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153] total 153 [2018-07-23 15:22:37,697 INFO L450 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-07-23 15:22:37,698 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-07-23 15:22:37,699 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-07-23 15:22:37,699 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 154 states. [2018-07-23 15:22:38,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:38,179 INFO L93 Difference]: Finished difference Result 311 states and 311 transitions. [2018-07-23 15:22:38,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-07-23 15:22:38,179 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 306 [2018-07-23 15:22:38,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:38,180 INFO L225 Difference]: With dead ends: 311 [2018-07-23 15:22:38,180 INFO L226 Difference]: Without dead ends: 309 [2018-07-23 15:22:38,181 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 15:22:38,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-07-23 15:22:38,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2018-07-23 15:22:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-07-23 15:22:38,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 309 transitions. [2018-07-23 15:22:38,186 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 309 transitions. Word has length 306 [2018-07-23 15:22:38,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:38,186 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 309 transitions. [2018-07-23 15:22:38,186 INFO L472 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-07-23 15:22:38,186 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 309 transitions. [2018-07-23 15:22:38,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-07-23 15:22:38,187 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:38,187 INFO L353 BasicCegarLoop]: trace histogram [153, 152, 1, 1, 1] [2018-07-23 15:22:38,187 INFO L414 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:38,188 INFO L82 PathProgramCache]: Analyzing trace with hash -852777929, now seen corresponding path program 152 times [2018-07-23 15:22:38,188 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:38,822 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 15:22:38,822 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:38,822 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154] total 154 [2018-07-23 15:22:38,823 INFO L450 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-07-23 15:22:38,824 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-07-23 15:22:38,825 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:22:38,825 INFO L87 Difference]: Start difference. First operand 309 states and 309 transitions. Second operand 155 states. [2018-07-23 15:22:39,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:39,602 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-07-23 15:22:39,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-07-23 15:22:39,602 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 308 [2018-07-23 15:22:39,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:39,603 INFO L225 Difference]: With dead ends: 313 [2018-07-23 15:22:39,603 INFO L226 Difference]: Without dead ends: 311 [2018-07-23 15:22:39,605 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:22:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-07-23 15:22:39,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-07-23 15:22:39,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-07-23 15:22:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2018-07-23 15:22:39,608 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 308 [2018-07-23 15:22:39,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:39,608 INFO L471 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2018-07-23 15:22:39,608 INFO L472 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-07-23 15:22:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2018-07-23 15:22:39,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-07-23 15:22:39,609 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:39,609 INFO L353 BasicCegarLoop]: trace histogram [154, 153, 1, 1, 1] [2018-07-23 15:22:39,609 INFO L414 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:39,609 INFO L82 PathProgramCache]: Analyzing trace with hash 819215857, now seen corresponding path program 153 times [2018-07-23 15:22:39,609 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:40,231 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 15:22:40,231 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:40,232 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155] total 155 [2018-07-23 15:22:40,232 INFO L450 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-07-23 15:22:40,234 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-07-23 15:22:40,235 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-07-23 15:22:40,235 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand 156 states. [2018-07-23 15:22:40,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:40,612 INFO L93 Difference]: Finished difference Result 315 states and 315 transitions. [2018-07-23 15:22:40,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-07-23 15:22:40,612 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 310 [2018-07-23 15:22:40,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:40,613 INFO L225 Difference]: With dead ends: 315 [2018-07-23 15:22:40,613 INFO L226 Difference]: Without dead ends: 313 [2018-07-23 15:22:40,614 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 15:22:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-07-23 15:22:40,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2018-07-23 15:22:40,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-07-23 15:22:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 313 transitions. [2018-07-23 15:22:40,617 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 313 transitions. Word has length 310 [2018-07-23 15:22:40,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:40,617 INFO L471 AbstractCegarLoop]: Abstraction has 313 states and 313 transitions. [2018-07-23 15:22:40,617 INFO L472 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-07-23 15:22:40,618 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 313 transitions. [2018-07-23 15:22:40,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-07-23 15:22:40,618 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:40,618 INFO L353 BasicCegarLoop]: trace histogram [155, 154, 1, 1, 1] [2018-07-23 15:22:40,619 INFO L414 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:40,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1287475499, now seen corresponding path program 154 times [2018-07-23 15:22:40,619 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:41,307 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 15:22:41,307 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:41,308 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156] total 156 [2018-07-23 15:22:41,308 INFO L450 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-07-23 15:22:41,310 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-07-23 15:22:41,311 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-07-23 15:22:41,312 INFO L87 Difference]: Start difference. First operand 313 states and 313 transitions. Second operand 157 states. [2018-07-23 15:22:42,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:42,166 INFO L93 Difference]: Finished difference Result 317 states and 317 transitions. [2018-07-23 15:22:42,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-07-23 15:22:42,166 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 312 [2018-07-23 15:22:42,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:42,167 INFO L225 Difference]: With dead ends: 317 [2018-07-23 15:22:42,167 INFO L226 Difference]: Without dead ends: 315 [2018-07-23 15:22:42,169 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 15:22:42,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-07-23 15:22:42,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-07-23 15:22:42,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-07-23 15:22:42,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 315 transitions. [2018-07-23 15:22:42,172 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 315 transitions. Word has length 312 [2018-07-23 15:22:42,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:42,172 INFO L471 AbstractCegarLoop]: Abstraction has 315 states and 315 transitions. [2018-07-23 15:22:42,172 INFO L472 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-07-23 15:22:42,172 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 315 transitions. [2018-07-23 15:22:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-07-23 15:22:42,173 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:42,173 INFO L353 BasicCegarLoop]: trace histogram [156, 155, 1, 1, 1] [2018-07-23 15:22:42,173 INFO L414 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:42,173 INFO L82 PathProgramCache]: Analyzing trace with hash 313425381, now seen corresponding path program 155 times [2018-07-23 15:22:42,173 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:42,911 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 15:22:42,911 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:42,911 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157] total 157 [2018-07-23 15:22:42,912 INFO L450 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-07-23 15:22:42,914 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-07-23 15:22:42,915 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:22:42,915 INFO L87 Difference]: Start difference. First operand 315 states and 315 transitions. Second operand 158 states. [2018-07-23 15:22:43,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:43,544 INFO L93 Difference]: Finished difference Result 319 states and 319 transitions. [2018-07-23 15:22:43,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-07-23 15:22:43,544 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 314 [2018-07-23 15:22:43,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:43,545 INFO L225 Difference]: With dead ends: 319 [2018-07-23 15:22:43,545 INFO L226 Difference]: Without dead ends: 317 [2018-07-23 15:22:43,546 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 15:22:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2018-07-23 15:22:43,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2018-07-23 15:22:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-07-23 15:22:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2018-07-23 15:22:43,550 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 314 [2018-07-23 15:22:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:43,550 INFO L471 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2018-07-23 15:22:43,550 INFO L472 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-07-23 15:22:43,550 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2018-07-23 15:22:43,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-07-23 15:22:43,551 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:43,551 INFO L353 BasicCegarLoop]: trace histogram [157, 156, 1, 1, 1] [2018-07-23 15:22:43,551 INFO L414 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:43,551 INFO L82 PathProgramCache]: Analyzing trace with hash 554132511, now seen corresponding path program 156 times [2018-07-23 15:22:43,551 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:44,198 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 15:22:44,198 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:44,199 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158] total 158 [2018-07-23 15:22:44,199 INFO L450 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-07-23 15:22:44,201 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-07-23 15:22:44,202 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-07-23 15:22:44,202 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand 159 states. [2018-07-23 15:22:44,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:44,962 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2018-07-23 15:22:44,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-07-23 15:22:44,963 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 316 [2018-07-23 15:22:44,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:44,964 INFO L225 Difference]: With dead ends: 321 [2018-07-23 15:22:44,964 INFO L226 Difference]: Without dead ends: 319 [2018-07-23 15:22:44,966 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 15:22:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-07-23 15:22:44,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-07-23 15:22:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-07-23 15:22:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 319 transitions. [2018-07-23 15:22:44,971 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 319 transitions. Word has length 316 [2018-07-23 15:22:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:44,972 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 319 transitions. [2018-07-23 15:22:44,972 INFO L472 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-07-23 15:22:44,972 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 319 transitions. [2018-07-23 15:22:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-07-23 15:22:44,973 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:44,973 INFO L353 BasicCegarLoop]: trace histogram [158, 157, 1, 1, 1] [2018-07-23 15:22:44,973 INFO L414 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:44,974 INFO L82 PathProgramCache]: Analyzing trace with hash -54549543, now seen corresponding path program 157 times [2018-07-23 15:22:44,974 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:45,823 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 15:22:45,823 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:45,824 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159] total 159 [2018-07-23 15:22:45,824 INFO L450 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-07-23 15:22:45,826 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-07-23 15:22:45,826 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:22:45,827 INFO L87 Difference]: Start difference. First operand 319 states and 319 transitions. Second operand 160 states. [2018-07-23 15:22:46,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:46,814 INFO L93 Difference]: Finished difference Result 323 states and 323 transitions. [2018-07-23 15:22:46,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-07-23 15:22:46,814 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 318 [2018-07-23 15:22:46,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:46,815 INFO L225 Difference]: With dead ends: 323 [2018-07-23 15:22:46,815 INFO L226 Difference]: Without dead ends: 321 [2018-07-23 15:22:46,816 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:22:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2018-07-23 15:22:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2018-07-23 15:22:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2018-07-23 15:22:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 321 transitions. [2018-07-23 15:22:46,820 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 321 transitions. Word has length 318 [2018-07-23 15:22:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:46,821 INFO L471 AbstractCegarLoop]: Abstraction has 321 states and 321 transitions. [2018-07-23 15:22:46,821 INFO L472 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-07-23 15:22:46,821 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 321 transitions. [2018-07-23 15:22:46,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2018-07-23 15:22:46,822 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:46,822 INFO L353 BasicCegarLoop]: trace histogram [159, 158, 1, 1, 1] [2018-07-23 15:22:46,823 INFO L414 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:46,823 INFO L82 PathProgramCache]: Analyzing trace with hash -882451181, now seen corresponding path program 158 times [2018-07-23 15:22:46,823 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:47,646 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 15:22:47,646 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:47,647 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160] total 160 [2018-07-23 15:22:47,647 INFO L450 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-07-23 15:22:47,648 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-07-23 15:22:47,649 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-07-23 15:22:47,649 INFO L87 Difference]: Start difference. First operand 321 states and 321 transitions. Second operand 161 states. [2018-07-23 15:22:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:47,944 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2018-07-23 15:22:47,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-07-23 15:22:47,945 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 320 [2018-07-23 15:22:47,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:47,945 INFO L225 Difference]: With dead ends: 325 [2018-07-23 15:22:47,945 INFO L226 Difference]: Without dead ends: 323 [2018-07-23 15:22:47,946 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 15:22:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-07-23 15:22:47,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-07-23 15:22:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-07-23 15:22:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2018-07-23 15:22:47,950 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 320 [2018-07-23 15:22:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:47,950 INFO L471 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2018-07-23 15:22:47,950 INFO L472 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-07-23 15:22:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2018-07-23 15:22:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-07-23 15:22:47,951 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:47,951 INFO L353 BasicCegarLoop]: trace histogram [160, 159, 1, 1, 1] [2018-07-23 15:22:47,951 INFO L414 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:47,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1926975539, now seen corresponding path program 159 times [2018-07-23 15:22:47,951 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:48,646 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 15:22:48,646 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:48,647 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161] total 161 [2018-07-23 15:22:48,647 INFO L450 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-07-23 15:22:48,649 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-07-23 15:22:48,650 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-07-23 15:22:48,650 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 162 states. [2018-07-23 15:22:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:49,525 INFO L93 Difference]: Finished difference Result 327 states and 327 transitions. [2018-07-23 15:22:49,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-07-23 15:22:49,525 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 322 [2018-07-23 15:22:49,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:49,525 INFO L225 Difference]: With dead ends: 327 [2018-07-23 15:22:49,526 INFO L226 Difference]: Without dead ends: 325 [2018-07-23 15:22:49,527 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-07-23 15:22:49,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2018-07-23 15:22:49,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2018-07-23 15:22:49,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-07-23 15:22:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 325 transitions. [2018-07-23 15:22:49,531 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 325 transitions. Word has length 322 [2018-07-23 15:22:49,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:49,531 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 325 transitions. [2018-07-23 15:22:49,531 INFO L472 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-07-23 15:22:49,531 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 325 transitions. [2018-07-23 15:22:49,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-07-23 15:22:49,532 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:49,532 INFO L353 BasicCegarLoop]: trace histogram [161, 160, 1, 1, 1] [2018-07-23 15:22:49,532 INFO L414 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:49,532 INFO L82 PathProgramCache]: Analyzing trace with hash -692536313, now seen corresponding path program 160 times [2018-07-23 15:22:49,532 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:50,205 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 15:22:50,206 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:50,206 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [162] total 162 [2018-07-23 15:22:50,206 INFO L450 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-07-23 15:22:50,208 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-07-23 15:22:50,209 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:22:50,209 INFO L87 Difference]: Start difference. First operand 325 states and 325 transitions. Second operand 163 states. [2018-07-23 15:22:51,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:51,271 INFO L93 Difference]: Finished difference Result 329 states and 329 transitions. [2018-07-23 15:22:51,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-07-23 15:22:51,271 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 324 [2018-07-23 15:22:51,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:51,271 INFO L225 Difference]: With dead ends: 329 [2018-07-23 15:22:51,271 INFO L226 Difference]: Without dead ends: 327 [2018-07-23 15:22:51,273 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:22:51,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-07-23 15:22:51,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2018-07-23 15:22:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-07-23 15:22:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2018-07-23 15:22:51,276 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 324 [2018-07-23 15:22:51,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:51,277 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2018-07-23 15:22:51,277 INFO L472 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-07-23 15:22:51,277 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2018-07-23 15:22:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-07-23 15:22:51,278 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:51,278 INFO L353 BasicCegarLoop]: trace histogram [162, 161, 1, 1, 1] [2018-07-23 15:22:51,278 INFO L414 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:51,278 INFO L82 PathProgramCache]: Analyzing trace with hash 192586177, now seen corresponding path program 161 times [2018-07-23 15:22:51,278 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:51,965 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 15:22:51,965 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:51,965 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163] total 163 [2018-07-23 15:22:51,966 INFO L450 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-07-23 15:22:51,967 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-07-23 15:22:51,968 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-07-23 15:22:51,969 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand 164 states. [2018-07-23 15:22:52,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:52,718 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2018-07-23 15:22:52,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-07-23 15:22:52,718 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 326 [2018-07-23 15:22:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:52,719 INFO L225 Difference]: With dead ends: 331 [2018-07-23 15:22:52,719 INFO L226 Difference]: Without dead ends: 329 [2018-07-23 15:22:52,720 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-07-23 15:22:52,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2018-07-23 15:22:52,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2018-07-23 15:22:52,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-07-23 15:22:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 329 transitions. [2018-07-23 15:22:52,723 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 329 transitions. Word has length 326 [2018-07-23 15:22:52,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:52,723 INFO L471 AbstractCegarLoop]: Abstraction has 329 states and 329 transitions. [2018-07-23 15:22:52,724 INFO L472 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-07-23 15:22:52,724 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 329 transitions. [2018-07-23 15:22:52,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-07-23 15:22:52,725 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:52,725 INFO L353 BasicCegarLoop]: trace histogram [163, 162, 1, 1, 1] [2018-07-23 15:22:52,725 INFO L414 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:52,725 INFO L82 PathProgramCache]: Analyzing trace with hash 391774459, now seen corresponding path program 162 times [2018-07-23 15:22:52,725 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:53,453 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 15:22:53,454 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:53,454 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164] total 164 [2018-07-23 15:22:53,454 INFO L450 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-07-23 15:22:53,456 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-07-23 15:22:53,458 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-07-23 15:22:53,458 INFO L87 Difference]: Start difference. First operand 329 states and 329 transitions. Second operand 165 states. [2018-07-23 15:22:53,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:53,773 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2018-07-23 15:22:53,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-07-23 15:22:53,773 INFO L78 Accepts]: Start accepts. Automaton has 165 states. Word has length 328 [2018-07-23 15:22:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:53,774 INFO L225 Difference]: With dead ends: 333 [2018-07-23 15:22:53,774 INFO L226 Difference]: Without dead ends: 331 [2018-07-23 15:22:53,775 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-07-23 15:22:53,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-07-23 15:22:53,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-07-23 15:22:53,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-07-23 15:22:53,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2018-07-23 15:22:53,778 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 328 [2018-07-23 15:22:53,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:53,779 INFO L471 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2018-07-23 15:22:53,779 INFO L472 AbstractCegarLoop]: Interpolant automaton has 165 states. [2018-07-23 15:22:53,779 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2018-07-23 15:22:53,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-07-23 15:22:53,780 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:53,780 INFO L353 BasicCegarLoop]: trace histogram [164, 163, 1, 1, 1] [2018-07-23 15:22:53,780 INFO L414 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:53,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1461814859, now seen corresponding path program 163 times [2018-07-23 15:22:53,780 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:54,482 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 15:22:54,483 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:54,483 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165] total 165 [2018-07-23 15:22:54,483 INFO L450 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-07-23 15:22:54,485 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-07-23 15:22:54,486 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-07-23 15:22:54,486 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand 166 states. [2018-07-23 15:22:55,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:55,016 INFO L93 Difference]: Finished difference Result 335 states and 335 transitions. [2018-07-23 15:22:55,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-07-23 15:22:55,016 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 330 [2018-07-23 15:22:55,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:55,017 INFO L225 Difference]: With dead ends: 335 [2018-07-23 15:22:55,017 INFO L226 Difference]: Without dead ends: 333 [2018-07-23 15:22:55,019 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 15:22:55,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-07-23 15:22:55,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2018-07-23 15:22:55,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2018-07-23 15:22:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 333 transitions. [2018-07-23 15:22:55,022 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 333 transitions. Word has length 330 [2018-07-23 15:22:55,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:55,022 INFO L471 AbstractCegarLoop]: Abstraction has 333 states and 333 transitions. [2018-07-23 15:22:55,022 INFO L472 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-07-23 15:22:55,022 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 333 transitions. [2018-07-23 15:22:55,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-07-23 15:22:55,023 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:55,023 INFO L353 BasicCegarLoop]: trace histogram [165, 164, 1, 1, 1] [2018-07-23 15:22:55,023 INFO L414 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:55,023 INFO L82 PathProgramCache]: Analyzing trace with hash -349721617, now seen corresponding path program 164 times [2018-07-23 15:22:55,023 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:55,736 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 15:22:55,736 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:55,737 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [166] total 166 [2018-07-23 15:22:55,737 INFO L450 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-07-23 15:22:55,739 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-07-23 15:22:55,740 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:22:55,740 INFO L87 Difference]: Start difference. First operand 333 states and 333 transitions. Second operand 167 states. [2018-07-23 15:22:56,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:56,730 INFO L93 Difference]: Finished difference Result 337 states and 337 transitions. [2018-07-23 15:22:56,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-07-23 15:22:56,730 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 332 [2018-07-23 15:22:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:56,730 INFO L225 Difference]: With dead ends: 337 [2018-07-23 15:22:56,731 INFO L226 Difference]: Without dead ends: 335 [2018-07-23 15:22:56,733 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:22:56,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-07-23 15:22:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2018-07-23 15:22:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-07-23 15:22:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2018-07-23 15:22:56,736 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 332 [2018-07-23 15:22:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:56,736 INFO L471 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2018-07-23 15:22:56,736 INFO L472 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-07-23 15:22:56,736 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2018-07-23 15:22:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-07-23 15:22:56,737 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:56,737 INFO L353 BasicCegarLoop]: trace histogram [166, 165, 1, 1, 1] [2018-07-23 15:22:56,738 INFO L414 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:56,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1074972759, now seen corresponding path program 165 times [2018-07-23 15:22:56,738 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:57,525 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 15:22:57,526 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:57,526 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167] total 167 [2018-07-23 15:22:57,526 INFO L450 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-07-23 15:22:57,529 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-07-23 15:22:57,531 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-07-23 15:22:57,531 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand 168 states. [2018-07-23 15:22:58,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:58,611 INFO L93 Difference]: Finished difference Result 339 states and 339 transitions. [2018-07-23 15:22:58,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-07-23 15:22:58,611 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 334 [2018-07-23 15:22:58,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:58,612 INFO L225 Difference]: With dead ends: 339 [2018-07-23 15:22:58,612 INFO L226 Difference]: Without dead ends: 337 [2018-07-23 15:22:58,613 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 15:22:58,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2018-07-23 15:22:58,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2018-07-23 15:22:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2018-07-23 15:22:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 337 transitions. [2018-07-23 15:22:58,617 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 337 transitions. Word has length 334 [2018-07-23 15:22:58,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:58,617 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 337 transitions. [2018-07-23 15:22:58,617 INFO L472 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-07-23 15:22:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 337 transitions. [2018-07-23 15:22:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-07-23 15:22:58,618 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:58,618 INFO L353 BasicCegarLoop]: trace histogram [167, 166, 1, 1, 1] [2018-07-23 15:22:58,618 INFO L414 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:58,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2038349027, now seen corresponding path program 166 times [2018-07-23 15:22:58,618 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:59,405 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 15:22:59,406 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:59,406 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [168] total 168 [2018-07-23 15:22:59,406 INFO L450 AbstractCegarLoop]: Interpolant automaton has 169 states [2018-07-23 15:22:59,408 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2018-07-23 15:22:59,409 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:22:59,409 INFO L87 Difference]: Start difference. First operand 337 states and 337 transitions. Second operand 169 states. [2018-07-23 15:23:00,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:00,537 INFO L93 Difference]: Finished difference Result 341 states and 341 transitions. [2018-07-23 15:23:00,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2018-07-23 15:23:00,537 INFO L78 Accepts]: Start accepts. Automaton has 169 states. Word has length 336 [2018-07-23 15:23:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:00,538 INFO L225 Difference]: With dead ends: 341 [2018-07-23 15:23:00,538 INFO L226 Difference]: Without dead ends: 339 [2018-07-23 15:23:00,540 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:23:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-07-23 15:23:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-07-23 15:23:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-07-23 15:23:00,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 339 transitions. [2018-07-23 15:23:00,545 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 339 transitions. Word has length 336 [2018-07-23 15:23:00,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:00,546 INFO L471 AbstractCegarLoop]: Abstraction has 339 states and 339 transitions. [2018-07-23 15:23:00,546 INFO L472 AbstractCegarLoop]: Interpolant automaton has 169 states. [2018-07-23 15:23:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 339 transitions. [2018-07-23 15:23:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-07-23 15:23:00,547 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:00,548 INFO L353 BasicCegarLoop]: trace histogram [168, 167, 1, 1, 1] [2018-07-23 15:23:00,548 INFO L414 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:00,548 INFO L82 PathProgramCache]: Analyzing trace with hash 348380061, now seen corresponding path program 167 times [2018-07-23 15:23:00,548 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:01,374 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 15:23:01,374 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:01,374 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [169] total 169 [2018-07-23 15:23:01,375 INFO L450 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-07-23 15:23:01,377 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-07-23 15:23:01,378 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-07-23 15:23:01,378 INFO L87 Difference]: Start difference. First operand 339 states and 339 transitions. Second operand 170 states. [2018-07-23 15:23:02,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:02,525 INFO L93 Difference]: Finished difference Result 343 states and 343 transitions. [2018-07-23 15:23:02,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2018-07-23 15:23:02,525 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 338 [2018-07-23 15:23:02,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:02,526 INFO L225 Difference]: With dead ends: 343 [2018-07-23 15:23:02,526 INFO L226 Difference]: Without dead ends: 341 [2018-07-23 15:23:02,527 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-07-23 15:23:02,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2018-07-23 15:23:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2018-07-23 15:23:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-07-23 15:23:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 341 transitions. [2018-07-23 15:23:02,532 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 341 transitions. Word has length 338 [2018-07-23 15:23:02,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:02,532 INFO L471 AbstractCegarLoop]: Abstraction has 341 states and 341 transitions. [2018-07-23 15:23:02,532 INFO L472 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-07-23 15:23:02,532 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 341 transitions. [2018-07-23 15:23:02,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-07-23 15:23:02,533 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:02,533 INFO L353 BasicCegarLoop]: trace histogram [169, 168, 1, 1, 1] [2018-07-23 15:23:02,534 INFO L414 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:02,534 INFO L82 PathProgramCache]: Analyzing trace with hash -214158377, now seen corresponding path program 168 times [2018-07-23 15:23:02,534 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:03,289 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 15:23:03,289 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:03,290 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [170] total 170 [2018-07-23 15:23:03,290 INFO L450 AbstractCegarLoop]: Interpolant automaton has 171 states [2018-07-23 15:23:03,292 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2018-07-23 15:23:03,293 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-07-23 15:23:03,293 INFO L87 Difference]: Start difference. First operand 341 states and 341 transitions. Second operand 171 states. [2018-07-23 15:23:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:04,481 INFO L93 Difference]: Finished difference Result 345 states and 345 transitions. [2018-07-23 15:23:04,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2018-07-23 15:23:04,481 INFO L78 Accepts]: Start accepts. Automaton has 171 states. Word has length 340 [2018-07-23 15:23:04,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:04,482 INFO L225 Difference]: With dead ends: 345 [2018-07-23 15:23:04,482 INFO L226 Difference]: Without dead ends: 343 [2018-07-23 15:23:04,484 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-07-23 15:23:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-07-23 15:23:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-07-23 15:23:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-07-23 15:23:04,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 343 transitions. [2018-07-23 15:23:04,487 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 343 transitions. Word has length 340 [2018-07-23 15:23:04,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:04,487 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 343 transitions. [2018-07-23 15:23:04,488 INFO L472 AbstractCegarLoop]: Interpolant automaton has 171 states. [2018-07-23 15:23:04,488 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 343 transitions. [2018-07-23 15:23:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-07-23 15:23:04,489 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:04,489 INFO L353 BasicCegarLoop]: trace histogram [170, 169, 1, 1, 1] [2018-07-23 15:23:04,489 INFO L414 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:04,489 INFO L82 PathProgramCache]: Analyzing trace with hash 352282001, now seen corresponding path program 169 times [2018-07-23 15:23:04,489 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:05,240 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 15:23:05,240 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:05,240 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [171] total 171 [2018-07-23 15:23:05,240 INFO L450 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-07-23 15:23:05,242 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-07-23 15:23:05,243 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-07-23 15:23:05,244 INFO L87 Difference]: Start difference. First operand 343 states and 343 transitions. Second operand 172 states. [2018-07-23 15:23:06,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:06,445 INFO L93 Difference]: Finished difference Result 347 states and 347 transitions. [2018-07-23 15:23:06,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2018-07-23 15:23:06,446 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 342 [2018-07-23 15:23:06,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:06,446 INFO L225 Difference]: With dead ends: 347 [2018-07-23 15:23:06,446 INFO L226 Difference]: Without dead ends: 345 [2018-07-23 15:23:06,448 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-07-23 15:23:06,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2018-07-23 15:23:06,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2018-07-23 15:23:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2018-07-23 15:23:06,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 345 transitions. [2018-07-23 15:23:06,451 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 345 transitions. Word has length 342 [2018-07-23 15:23:06,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:06,451 INFO L471 AbstractCegarLoop]: Abstraction has 345 states and 345 transitions. [2018-07-23 15:23:06,452 INFO L472 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-07-23 15:23:06,452 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 345 transitions. [2018-07-23 15:23:06,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-07-23 15:23:06,452 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:06,453 INFO L353 BasicCegarLoop]: trace histogram [171, 170, 1, 1, 1] [2018-07-23 15:23:06,453 INFO L414 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:06,453 INFO L82 PathProgramCache]: Analyzing trace with hash -759361333, now seen corresponding path program 170 times [2018-07-23 15:23:06,453 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:07,350 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 15:23:07,350 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:07,351 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [172] total 172 [2018-07-23 15:23:07,351 INFO L450 AbstractCegarLoop]: Interpolant automaton has 173 states [2018-07-23 15:23:07,353 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2018-07-23 15:23:07,354 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-07-23 15:23:07,354 INFO L87 Difference]: Start difference. First operand 345 states and 345 transitions. Second operand 173 states. [2018-07-23 15:23:08,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:08,511 INFO L93 Difference]: Finished difference Result 349 states and 349 transitions. [2018-07-23 15:23:08,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2018-07-23 15:23:08,511 INFO L78 Accepts]: Start accepts. Automaton has 173 states. Word has length 344 [2018-07-23 15:23:08,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:08,512 INFO L225 Difference]: With dead ends: 349 [2018-07-23 15:23:08,512 INFO L226 Difference]: Without dead ends: 347 [2018-07-23 15:23:08,513 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 15:23:08,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-07-23 15:23:08,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-07-23 15:23:08,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-07-23 15:23:08,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2018-07-23 15:23:08,516 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 344 [2018-07-23 15:23:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:08,517 INFO L471 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2018-07-23 15:23:08,517 INFO L472 AbstractCegarLoop]: Interpolant automaton has 173 states. [2018-07-23 15:23:08,517 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2018-07-23 15:23:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-07-23 15:23:08,518 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:08,518 INFO L353 BasicCegarLoop]: trace histogram [172, 171, 1, 1, 1] [2018-07-23 15:23:08,518 INFO L414 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:08,518 INFO L82 PathProgramCache]: Analyzing trace with hash 398251397, now seen corresponding path program 171 times [2018-07-23 15:23:08,518 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:09,292 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 15:23:09,292 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:09,293 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [173] total 173 [2018-07-23 15:23:09,293 INFO L450 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-07-23 15:23:09,295 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-07-23 15:23:09,296 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-07-23 15:23:09,297 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand 174 states. [2018-07-23 15:23:10,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:10,104 INFO L93 Difference]: Finished difference Result 351 states and 351 transitions. [2018-07-23 15:23:10,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2018-07-23 15:23:10,105 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 346 [2018-07-23 15:23:10,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:10,105 INFO L225 Difference]: With dead ends: 351 [2018-07-23 15:23:10,105 INFO L226 Difference]: Without dead ends: 349 [2018-07-23 15:23:10,107 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-07-23 15:23:10,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2018-07-23 15:23:10,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2018-07-23 15:23:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-07-23 15:23:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 349 transitions. [2018-07-23 15:23:10,110 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 349 transitions. Word has length 346 [2018-07-23 15:23:10,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:10,111 INFO L471 AbstractCegarLoop]: Abstraction has 349 states and 349 transitions. [2018-07-23 15:23:10,111 INFO L472 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-07-23 15:23:10,111 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 349 transitions. [2018-07-23 15:23:10,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-07-23 15:23:10,112 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:10,112 INFO L353 BasicCegarLoop]: trace histogram [173, 172, 1, 1, 1] [2018-07-23 15:23:10,112 INFO L414 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:10,112 INFO L82 PathProgramCache]: Analyzing trace with hash 467555263, now seen corresponding path program 172 times [2018-07-23 15:23:10,112 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:10,890 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 15:23:10,891 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:10,891 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [174] total 174 [2018-07-23 15:23:10,891 INFO L450 AbstractCegarLoop]: Interpolant automaton has 175 states [2018-07-23 15:23:10,893 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2018-07-23 15:23:10,894 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:23:10,894 INFO L87 Difference]: Start difference. First operand 349 states and 349 transitions. Second operand 175 states. [2018-07-23 15:23:11,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:11,283 INFO L93 Difference]: Finished difference Result 353 states and 353 transitions. [2018-07-23 15:23:11,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2018-07-23 15:23:11,283 INFO L78 Accepts]: Start accepts. Automaton has 175 states. Word has length 348 [2018-07-23 15:23:11,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:11,284 INFO L225 Difference]: With dead ends: 353 [2018-07-23 15:23:11,284 INFO L226 Difference]: Without dead ends: 351 [2018-07-23 15:23:11,285 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:23:11,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-07-23 15:23:11,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-07-23 15:23:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-07-23 15:23:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 351 transitions. [2018-07-23 15:23:11,289 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 351 transitions. Word has length 348 [2018-07-23 15:23:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:11,289 INFO L471 AbstractCegarLoop]: Abstraction has 351 states and 351 transitions. [2018-07-23 15:23:11,289 INFO L472 AbstractCegarLoop]: Interpolant automaton has 175 states. [2018-07-23 15:23:11,289 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 351 transitions. [2018-07-23 15:23:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-07-23 15:23:11,290 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:11,290 INFO L353 BasicCegarLoop]: trace histogram [174, 173, 1, 1, 1] [2018-07-23 15:23:11,290 INFO L414 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:11,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1650906247, now seen corresponding path program 173 times [2018-07-23 15:23:11,291 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:12,182 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 15:23:12,182 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:12,182 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [175] total 175 [2018-07-23 15:23:12,183 INFO L450 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-07-23 15:23:12,185 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-07-23 15:23:12,186 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15400, Invalid=15400, Unknown=0, NotChecked=0, Total=30800 [2018-07-23 15:23:12,186 INFO L87 Difference]: Start difference. First operand 351 states and 351 transitions. Second operand 176 states. [2018-07-23 15:23:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:12,851 INFO L93 Difference]: Finished difference Result 355 states and 355 transitions. [2018-07-23 15:23:12,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2018-07-23 15:23:12,851 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 350 [2018-07-23 15:23:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:12,852 INFO L225 Difference]: With dead ends: 355 [2018-07-23 15:23:12,852 INFO L226 Difference]: Without dead ends: 353 [2018-07-23 15:23:12,853 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 15:23:12,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2018-07-23 15:23:12,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2018-07-23 15:23:12,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2018-07-23 15:23:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 353 transitions. [2018-07-23 15:23:12,858 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 353 transitions. Word has length 350 [2018-07-23 15:23:12,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:12,858 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 353 transitions. [2018-07-23 15:23:12,858 INFO L472 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-07-23 15:23:12,858 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 353 transitions. [2018-07-23 15:23:12,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2018-07-23 15:23:12,860 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:12,860 INFO L353 BasicCegarLoop]: trace histogram [175, 174, 1, 1, 1] [2018-07-23 15:23:12,860 INFO L414 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:12,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1677919053, now seen corresponding path program 174 times [2018-07-23 15:23:12,860 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:13,660 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 15:23:13,660 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:13,660 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [176] total 176 [2018-07-23 15:23:13,660 INFO L450 AbstractCegarLoop]: Interpolant automaton has 177 states [2018-07-23 15:23:13,662 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2018-07-23 15:23:13,664 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2018-07-23 15:23:13,664 INFO L87 Difference]: Start difference. First operand 353 states and 353 transitions. Second operand 177 states. [2018-07-23 15:23:15,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:15,135 INFO L93 Difference]: Finished difference Result 357 states and 357 transitions. [2018-07-23 15:23:15,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2018-07-23 15:23:15,135 INFO L78 Accepts]: Start accepts. Automaton has 177 states. Word has length 352 [2018-07-23 15:23:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:15,136 INFO L225 Difference]: With dead ends: 357 [2018-07-23 15:23:15,136 INFO L226 Difference]: Without dead ends: 355 [2018-07-23 15:23:15,138 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2018-07-23 15:23:15,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-07-23 15:23:15,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2018-07-23 15:23:15,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-07-23 15:23:15,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 355 transitions. [2018-07-23 15:23:15,141 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 355 transitions. Word has length 352 [2018-07-23 15:23:15,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:15,141 INFO L471 AbstractCegarLoop]: Abstraction has 355 states and 355 transitions. [2018-07-23 15:23:15,141 INFO L472 AbstractCegarLoop]: Interpolant automaton has 177 states. [2018-07-23 15:23:15,141 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 355 transitions. [2018-07-23 15:23:15,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-07-23 15:23:15,142 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:15,142 INFO L353 BasicCegarLoop]: trace histogram [176, 175, 1, 1, 1] [2018-07-23 15:23:15,143 INFO L414 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:15,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1867421843, now seen corresponding path program 175 times [2018-07-23 15:23:15,143 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:15,989 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 15:23:15,990 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:15,990 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [177] total 177 [2018-07-23 15:23:15,990 INFO L450 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-07-23 15:23:15,992 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-07-23 15:23:15,993 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15753, Invalid=15753, Unknown=0, NotChecked=0, Total=31506 [2018-07-23 15:23:15,994 INFO L87 Difference]: Start difference. First operand 355 states and 355 transitions. Second operand 178 states. [2018-07-23 15:23:17,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:17,418 INFO L93 Difference]: Finished difference Result 359 states and 359 transitions. [2018-07-23 15:23:17,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2018-07-23 15:23:17,419 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 354 [2018-07-23 15:23:17,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:17,419 INFO L225 Difference]: With dead ends: 359 [2018-07-23 15:23:17,420 INFO L226 Difference]: Without dead ends: 357 [2018-07-23 15:23:17,423 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 15:23:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2018-07-23 15:23:17,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2018-07-23 15:23:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2018-07-23 15:23:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 357 transitions. [2018-07-23 15:23:17,427 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 357 transitions. Word has length 354 [2018-07-23 15:23:17,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:17,427 INFO L471 AbstractCegarLoop]: Abstraction has 357 states and 357 transitions. [2018-07-23 15:23:17,427 INFO L472 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-07-23 15:23:17,427 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 357 transitions. [2018-07-23 15:23:17,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2018-07-23 15:23:17,428 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:17,428 INFO L353 BasicCegarLoop]: trace histogram [177, 176, 1, 1, 1] [2018-07-23 15:23:17,428 INFO L414 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:17,428 INFO L82 PathProgramCache]: Analyzing trace with hash 703990695, now seen corresponding path program 176 times [2018-07-23 15:23:17,429 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:18,347 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 15:23:18,348 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:18,348 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [178] total 178 [2018-07-23 15:23:18,348 INFO L450 AbstractCegarLoop]: Interpolant automaton has 179 states [2018-07-23 15:23:18,350 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2018-07-23 15:23:18,352 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15931, Invalid=15931, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:23:18,352 INFO L87 Difference]: Start difference. First operand 357 states and 357 transitions. Second operand 179 states. [2018-07-23 15:23:18,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:18,880 INFO L93 Difference]: Finished difference Result 361 states and 361 transitions. [2018-07-23 15:23:18,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2018-07-23 15:23:18,880 INFO L78 Accepts]: Start accepts. Automaton has 179 states. Word has length 356 [2018-07-23 15:23:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:18,880 INFO L225 Difference]: With dead ends: 361 [2018-07-23 15:23:18,880 INFO L226 Difference]: Without dead ends: 359 [2018-07-23 15:23:18,882 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15931, Invalid=15931, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:23:18,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-07-23 15:23:18,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2018-07-23 15:23:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-07-23 15:23:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 359 transitions. [2018-07-23 15:23:18,886 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 359 transitions. Word has length 356 [2018-07-23 15:23:18,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:18,886 INFO L471 AbstractCegarLoop]: Abstraction has 359 states and 359 transitions. [2018-07-23 15:23:18,886 INFO L472 AbstractCegarLoop]: Interpolant automaton has 179 states. [2018-07-23 15:23:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 359 transitions. [2018-07-23 15:23:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-07-23 15:23:18,887 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:18,887 INFO L353 BasicCegarLoop]: trace histogram [178, 177, 1, 1, 1] [2018-07-23 15:23:18,887 INFO L414 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:18,887 INFO L82 PathProgramCache]: Analyzing trace with hash -2069722783, now seen corresponding path program 177 times [2018-07-23 15:23:18,887 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:19,732 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 15:23:19,733 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:19,733 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [179] total 179 [2018-07-23 15:23:19,733 INFO L450 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-07-23 15:23:19,735 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-07-23 15:23:19,736 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16110, Invalid=16110, Unknown=0, NotChecked=0, Total=32220 [2018-07-23 15:23:19,736 INFO L87 Difference]: Start difference. First operand 359 states and 359 transitions. Second operand 180 states. [2018-07-23 15:23:20,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:20,803 INFO L93 Difference]: Finished difference Result 363 states and 363 transitions. [2018-07-23 15:23:20,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2018-07-23 15:23:20,804 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 358 [2018-07-23 15:23:20,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:20,804 INFO L225 Difference]: With dead ends: 363 [2018-07-23 15:23:20,804 INFO L226 Difference]: Without dead ends: 361 [2018-07-23 15:23:20,808 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=16110, Invalid=16110, Unknown=0, NotChecked=0, Total=32220 [2018-07-23 15:23:20,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2018-07-23 15:23:20,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2018-07-23 15:23:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-07-23 15:23:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 361 transitions. [2018-07-23 15:23:20,813 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 361 transitions. Word has length 358 [2018-07-23 15:23:20,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:20,813 INFO L471 AbstractCegarLoop]: Abstraction has 361 states and 361 transitions. [2018-07-23 15:23:20,813 INFO L472 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-07-23 15:23:20,813 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 361 transitions. [2018-07-23 15:23:20,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-07-23 15:23:20,815 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:20,815 INFO L353 BasicCegarLoop]: trace histogram [179, 178, 1, 1, 1] [2018-07-23 15:23:20,815 INFO L414 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:20,815 INFO L82 PathProgramCache]: Analyzing trace with hash -433684325, now seen corresponding path program 178 times [2018-07-23 15:23:20,815 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:21,778 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 15:23:21,778 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:21,779 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [180] total 180 [2018-07-23 15:23:21,779 INFO L450 AbstractCegarLoop]: Interpolant automaton has 181 states [2018-07-23 15:23:21,780 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2018-07-23 15:23:21,781 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16290, Invalid=16290, Unknown=0, NotChecked=0, Total=32580 [2018-07-23 15:23:21,782 INFO L87 Difference]: Start difference. First operand 361 states and 361 transitions. Second operand 181 states. [2018-07-23 15:23:23,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:23,260 INFO L93 Difference]: Finished difference Result 365 states and 365 transitions. [2018-07-23 15:23:23,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2018-07-23 15:23:23,260 INFO L78 Accepts]: Start accepts. Automaton has 181 states. Word has length 360 [2018-07-23 15:23:23,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:23,260 INFO L225 Difference]: With dead ends: 365 [2018-07-23 15:23:23,260 INFO L226 Difference]: Without dead ends: 363 [2018-07-23 15:23:23,261 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 15:23:23,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-07-23 15:23:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2018-07-23 15:23:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2018-07-23 15:23:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2018-07-23 15:23:23,265 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 360 [2018-07-23 15:23:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:23,265 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2018-07-23 15:23:23,265 INFO L472 AbstractCegarLoop]: Interpolant automaton has 181 states. [2018-07-23 15:23:23,265 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2018-07-23 15:23:23,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-07-23 15:23:23,266 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:23,266 INFO L353 BasicCegarLoop]: trace histogram [180, 179, 1, 1, 1] [2018-07-23 15:23:23,267 INFO L414 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:23,267 INFO L82 PathProgramCache]: Analyzing trace with hash -158756523, now seen corresponding path program 179 times [2018-07-23 15:23:23,267 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:24,127 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 15:23:24,128 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:24,128 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [181] total 181 [2018-07-23 15:23:24,128 INFO L450 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-07-23 15:23:24,130 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-07-23 15:23:24,132 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16471, Invalid=16471, Unknown=0, NotChecked=0, Total=32942 [2018-07-23 15:23:24,132 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand 182 states. [2018-07-23 15:23:24,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:24,546 INFO L93 Difference]: Finished difference Result 367 states and 367 transitions. [2018-07-23 15:23:24,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2018-07-23 15:23:24,547 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 362 [2018-07-23 15:23:24,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:24,547 INFO L225 Difference]: With dead ends: 367 [2018-07-23 15:23:24,547 INFO L226 Difference]: Without dead ends: 365 [2018-07-23 15:23:24,549 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 15:23:24,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2018-07-23 15:23:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2018-07-23 15:23:24,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2018-07-23 15:23:24,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 365 transitions. [2018-07-23 15:23:24,552 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 365 transitions. Word has length 362 [2018-07-23 15:23:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:24,553 INFO L471 AbstractCegarLoop]: Abstraction has 365 states and 365 transitions. [2018-07-23 15:23:24,553 INFO L472 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-07-23 15:23:24,553 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 365 transitions. [2018-07-23 15:23:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2018-07-23 15:23:24,554 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:24,554 INFO L353 BasicCegarLoop]: trace histogram [181, 180, 1, 1, 1] [2018-07-23 15:23:24,554 INFO L414 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:24,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2053856143, now seen corresponding path program 180 times [2018-07-23 15:23:24,554 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:25,427 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 15:23:25,427 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:25,427 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [182] total 182 [2018-07-23 15:23:25,427 INFO L450 AbstractCegarLoop]: Interpolant automaton has 183 states [2018-07-23 15:23:25,430 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2018-07-23 15:23:25,431 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16653, Invalid=16653, Unknown=0, NotChecked=0, Total=33306 [2018-07-23 15:23:25,431 INFO L87 Difference]: Start difference. First operand 365 states and 365 transitions. Second operand 183 states. [2018-07-23 15:23:27,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:27,122 INFO L93 Difference]: Finished difference Result 369 states and 369 transitions. [2018-07-23 15:23:27,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2018-07-23 15:23:27,122 INFO L78 Accepts]: Start accepts. Automaton has 183 states. Word has length 364 [2018-07-23 15:23:27,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:27,123 INFO L225 Difference]: With dead ends: 369 [2018-07-23 15:23:27,123 INFO L226 Difference]: Without dead ends: 367 [2018-07-23 15:23:27,125 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 15:23:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-07-23 15:23:27,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2018-07-23 15:23:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2018-07-23 15:23:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 367 transitions. [2018-07-23 15:23:27,128 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 367 transitions. Word has length 364 [2018-07-23 15:23:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:27,129 INFO L471 AbstractCegarLoop]: Abstraction has 367 states and 367 transitions. [2018-07-23 15:23:27,129 INFO L472 AbstractCegarLoop]: Interpolant automaton has 183 states. [2018-07-23 15:23:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 367 transitions. [2018-07-23 15:23:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-07-23 15:23:27,130 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:27,130 INFO L353 BasicCegarLoop]: trace histogram [182, 181, 1, 1, 1] [2018-07-23 15:23:27,130 INFO L414 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:27,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1929150647, now seen corresponding path program 181 times [2018-07-23 15:23:27,130 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:28,210 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 15:23:28,210 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:28,211 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [183] total 183 [2018-07-23 15:23:28,211 INFO L450 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-07-23 15:23:28,214 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-07-23 15:23:28,216 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16836, Invalid=16836, Unknown=0, NotChecked=0, Total=33672 [2018-07-23 15:23:28,216 INFO L87 Difference]: Start difference. First operand 367 states and 367 transitions. Second operand 184 states. [2018-07-23 15:23:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:28,857 INFO L93 Difference]: Finished difference Result 371 states and 371 transitions. [2018-07-23 15:23:28,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2018-07-23 15:23:28,857 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 366 [2018-07-23 15:23:28,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:28,858 INFO L225 Difference]: With dead ends: 371 [2018-07-23 15:23:28,858 INFO L226 Difference]: Without dead ends: 369 [2018-07-23 15:23:28,860 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=16836, Invalid=16836, Unknown=0, NotChecked=0, Total=33672 [2018-07-23 15:23:28,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2018-07-23 15:23:28,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2018-07-23 15:23:28,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-07-23 15:23:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 369 transitions. [2018-07-23 15:23:28,863 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 369 transitions. Word has length 366 [2018-07-23 15:23:28,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:28,864 INFO L471 AbstractCegarLoop]: Abstraction has 369 states and 369 transitions. [2018-07-23 15:23:28,864 INFO L472 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-07-23 15:23:28,864 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 369 transitions. [2018-07-23 15:23:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-07-23 15:23:28,865 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:28,865 INFO L353 BasicCegarLoop]: trace histogram [183, 182, 1, 1, 1] [2018-07-23 15:23:28,865 INFO L414 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:28,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1512152195, now seen corresponding path program 182 times [2018-07-23 15:23:28,865 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:29,759 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 15:23:29,759 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:29,760 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [184] total 184 [2018-07-23 15:23:29,760 INFO L450 AbstractCegarLoop]: Interpolant automaton has 185 states [2018-07-23 15:23:29,762 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2018-07-23 15:23:29,763 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17020, Invalid=17020, Unknown=0, NotChecked=0, Total=34040 [2018-07-23 15:23:29,764 INFO L87 Difference]: Start difference. First operand 369 states and 369 transitions. Second operand 185 states. [2018-07-23 15:23:31,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:31,515 INFO L93 Difference]: Finished difference Result 373 states and 373 transitions. [2018-07-23 15:23:31,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2018-07-23 15:23:31,515 INFO L78 Accepts]: Start accepts. Automaton has 185 states. Word has length 368 [2018-07-23 15:23:31,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:31,516 INFO L225 Difference]: With dead ends: 373 [2018-07-23 15:23:31,516 INFO L226 Difference]: Without dead ends: 371 [2018-07-23 15:23:31,518 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 15:23:31,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2018-07-23 15:23:31,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2018-07-23 15:23:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2018-07-23 15:23:31,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 371 transitions. [2018-07-23 15:23:31,521 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 371 transitions. Word has length 368 [2018-07-23 15:23:31,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:31,521 INFO L471 AbstractCegarLoop]: Abstraction has 371 states and 371 transitions. [2018-07-23 15:23:31,521 INFO L472 AbstractCegarLoop]: Interpolant automaton has 185 states. [2018-07-23 15:23:31,521 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 371 transitions. [2018-07-23 15:23:31,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-07-23 15:23:31,522 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:31,523 INFO L353 BasicCegarLoop]: trace histogram [184, 183, 1, 1, 1] [2018-07-23 15:23:31,523 INFO L414 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:31,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1479365437, now seen corresponding path program 183 times [2018-07-23 15:23:31,523 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:32,586 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 15:23:32,587 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:32,587 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [185] total 185 [2018-07-23 15:23:32,587 INFO L450 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-07-23 15:23:32,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-07-23 15:23:32,590 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17205, Invalid=17205, Unknown=0, NotChecked=0, Total=34410 [2018-07-23 15:23:32,590 INFO L87 Difference]: Start difference. First operand 371 states and 371 transitions. Second operand 186 states. [2018-07-23 15:23:33,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:33,145 INFO L93 Difference]: Finished difference Result 375 states and 375 transitions. [2018-07-23 15:23:33,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2018-07-23 15:23:33,146 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 370 [2018-07-23 15:23:33,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:33,146 INFO L225 Difference]: With dead ends: 375 [2018-07-23 15:23:33,146 INFO L226 Difference]: Without dead ends: 373 [2018-07-23 15:23:33,147 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17205, Invalid=17205, Unknown=0, NotChecked=0, Total=34410 [2018-07-23 15:23:33,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2018-07-23 15:23:33,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2018-07-23 15:23:33,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2018-07-23 15:23:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 373 transitions. [2018-07-23 15:23:33,151 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 373 transitions. Word has length 370 [2018-07-23 15:23:33,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:33,151 INFO L471 AbstractCegarLoop]: Abstraction has 373 states and 373 transitions. [2018-07-23 15:23:33,151 INFO L472 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-07-23 15:23:33,151 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 373 transitions. [2018-07-23 15:23:33,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-07-23 15:23:33,152 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:33,153 INFO L353 BasicCegarLoop]: trace histogram [185, 184, 1, 1, 1] [2018-07-23 15:23:33,153 INFO L414 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:33,153 INFO L82 PathProgramCache]: Analyzing trace with hash 36062071, now seen corresponding path program 184 times [2018-07-23 15:23:33,153 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:34,125 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 15:23:34,125 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:34,126 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [186] total 186 [2018-07-23 15:23:34,126 INFO L450 AbstractCegarLoop]: Interpolant automaton has 187 states [2018-07-23 15:23:34,128 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 187 interpolants. [2018-07-23 15:23:34,130 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17391, Invalid=17391, Unknown=0, NotChecked=0, Total=34782 [2018-07-23 15:23:34,130 INFO L87 Difference]: Start difference. First operand 373 states and 373 transitions. Second operand 187 states. [2018-07-23 15:23:35,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:35,993 INFO L93 Difference]: Finished difference Result 377 states and 377 transitions. [2018-07-23 15:23:35,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2018-07-23 15:23:35,993 INFO L78 Accepts]: Start accepts. Automaton has 187 states. Word has length 372 [2018-07-23 15:23:35,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:35,994 INFO L225 Difference]: With dead ends: 377 [2018-07-23 15:23:35,994 INFO L226 Difference]: Without dead ends: 375 [2018-07-23 15:23:35,996 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 15:23:35,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-07-23 15:23:35,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2018-07-23 15:23:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2018-07-23 15:23:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 375 transitions. [2018-07-23 15:23:36,000 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 375 transitions. Word has length 372 [2018-07-23 15:23:36,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:36,000 INFO L471 AbstractCegarLoop]: Abstraction has 375 states and 375 transitions. [2018-07-23 15:23:36,000 INFO L472 AbstractCegarLoop]: Interpolant automaton has 187 states. [2018-07-23 15:23:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 375 transitions. [2018-07-23 15:23:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2018-07-23 15:23:36,001 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:36,001 INFO L353 BasicCegarLoop]: trace histogram [186, 185, 1, 1, 1] [2018-07-23 15:23:36,001 INFO L414 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:36,001 INFO L82 PathProgramCache]: Analyzing trace with hash 295963953, now seen corresponding path program 185 times [2018-07-23 15:23:36,001 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:36,942 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 15:23:36,942 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:36,942 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [187] total 187 [2018-07-23 15:23:36,943 INFO L450 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-07-23 15:23:36,947 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-07-23 15:23:36,950 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17578, Invalid=17578, Unknown=0, NotChecked=0, Total=35156 [2018-07-23 15:23:36,950 INFO L87 Difference]: Start difference. First operand 375 states and 375 transitions. Second operand 188 states. [2018-07-23 15:23:37,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:37,652 INFO L93 Difference]: Finished difference Result 379 states and 379 transitions. [2018-07-23 15:23:37,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2018-07-23 15:23:37,652 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 374 [2018-07-23 15:23:37,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:37,653 INFO L225 Difference]: With dead ends: 379 [2018-07-23 15:23:37,653 INFO L226 Difference]: Without dead ends: 377 [2018-07-23 15:23:37,655 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17578, Invalid=17578, Unknown=0, NotChecked=0, Total=35156 [2018-07-23 15:23:37,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2018-07-23 15:23:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2018-07-23 15:23:37,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2018-07-23 15:23:37,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 377 transitions. [2018-07-23 15:23:37,658 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 377 transitions. Word has length 374 [2018-07-23 15:23:37,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:37,659 INFO L471 AbstractCegarLoop]: Abstraction has 377 states and 377 transitions. [2018-07-23 15:23:37,659 INFO L472 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-07-23 15:23:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 377 transitions. [2018-07-23 15:23:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-07-23 15:23:37,660 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:37,660 INFO L353 BasicCegarLoop]: trace histogram [187, 186, 1, 1, 1] [2018-07-23 15:23:37,660 INFO L414 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:37,660 INFO L82 PathProgramCache]: Analyzing trace with hash 953569387, now seen corresponding path program 186 times [2018-07-23 15:23:37,660 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:38,733 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 15:23:38,734 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:38,734 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [188] total 188 [2018-07-23 15:23:38,734 INFO L450 AbstractCegarLoop]: Interpolant automaton has 189 states [2018-07-23 15:23:38,738 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2018-07-23 15:23:38,740 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17766, Invalid=17766, Unknown=0, NotChecked=0, Total=35532 [2018-07-23 15:23:38,740 INFO L87 Difference]: Start difference. First operand 377 states and 377 transitions. Second operand 189 states. [2018-07-23 15:23:40,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:40,030 INFO L93 Difference]: Finished difference Result 381 states and 381 transitions. [2018-07-23 15:23:40,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2018-07-23 15:23:40,030 INFO L78 Accepts]: Start accepts. Automaton has 189 states. Word has length 376 [2018-07-23 15:23:40,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:40,031 INFO L225 Difference]: With dead ends: 381 [2018-07-23 15:23:40,031 INFO L226 Difference]: Without dead ends: 379 [2018-07-23 15:23:40,033 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 15:23:40,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2018-07-23 15:23:40,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2018-07-23 15:23:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-07-23 15:23:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 379 transitions. [2018-07-23 15:23:40,037 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 379 transitions. Word has length 376 [2018-07-23 15:23:40,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:40,037 INFO L471 AbstractCegarLoop]: Abstraction has 379 states and 379 transitions. [2018-07-23 15:23:40,037 INFO L472 AbstractCegarLoop]: Interpolant automaton has 189 states. [2018-07-23 15:23:40,037 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 379 transitions. [2018-07-23 15:23:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-07-23 15:23:40,039 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:40,039 INFO L353 BasicCegarLoop]: trace histogram [188, 187, 1, 1, 1] [2018-07-23 15:23:40,039 INFO L414 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:40,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1552198949, now seen corresponding path program 187 times [2018-07-23 15:23:40,039 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:41,031 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 15:23:41,031 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:41,031 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [189] total 189 [2018-07-23 15:23:41,031 INFO L450 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-07-23 15:23:41,034 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-07-23 15:23:41,036 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17955, Invalid=17955, Unknown=0, NotChecked=0, Total=35910 [2018-07-23 15:23:41,037 INFO L87 Difference]: Start difference. First operand 379 states and 379 transitions. Second operand 190 states. [2018-07-23 15:23:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:43,645 INFO L93 Difference]: Finished difference Result 383 states and 383 transitions. [2018-07-23 15:23:43,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2018-07-23 15:23:43,645 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 378 [2018-07-23 15:23:43,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:43,646 INFO L225 Difference]: With dead ends: 383 [2018-07-23 15:23:43,646 INFO L226 Difference]: Without dead ends: 381 [2018-07-23 15:23:43,650 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 15:23:43,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2018-07-23 15:23:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2018-07-23 15:23:43,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2018-07-23 15:23:43,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 381 transitions. [2018-07-23 15:23:43,654 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 381 transitions. Word has length 378 [2018-07-23 15:23:43,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:43,655 INFO L471 AbstractCegarLoop]: Abstraction has 381 states and 381 transitions. [2018-07-23 15:23:43,655 INFO L472 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-07-23 15:23:43,655 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 381 transitions. [2018-07-23 15:23:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2018-07-23 15:23:43,656 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:43,656 INFO L353 BasicCegarLoop]: trace histogram [189, 188, 1, 1, 1] [2018-07-23 15:23:43,656 INFO L414 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:43,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1309590367, now seen corresponding path program 188 times [2018-07-23 15:23:43,656 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:44,858 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 15:23:44,859 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:44,859 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [190] total 190 [2018-07-23 15:23:44,859 INFO L450 AbstractCegarLoop]: Interpolant automaton has 191 states [2018-07-23 15:23:44,862 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2018-07-23 15:23:44,863 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18145, Invalid=18145, Unknown=0, NotChecked=0, Total=36290 [2018-07-23 15:23:44,863 INFO L87 Difference]: Start difference. First operand 381 states and 381 transitions. Second operand 191 states. [2018-07-23 15:23:45,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:45,784 INFO L93 Difference]: Finished difference Result 385 states and 385 transitions. [2018-07-23 15:23:45,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2018-07-23 15:23:45,784 INFO L78 Accepts]: Start accepts. Automaton has 191 states. Word has length 380 [2018-07-23 15:23:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:45,785 INFO L225 Difference]: With dead ends: 385 [2018-07-23 15:23:45,785 INFO L226 Difference]: Without dead ends: 383 [2018-07-23 15:23:45,787 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18145, Invalid=18145, Unknown=0, NotChecked=0, Total=36290 [2018-07-23 15:23:45,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-07-23 15:23:45,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-07-23 15:23:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-07-23 15:23:45,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 383 transitions. [2018-07-23 15:23:45,791 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 383 transitions. Word has length 380 [2018-07-23 15:23:45,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:45,791 INFO L471 AbstractCegarLoop]: Abstraction has 383 states and 383 transitions. [2018-07-23 15:23:45,791 INFO L472 AbstractCegarLoop]: Interpolant automaton has 191 states. [2018-07-23 15:23:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 383 transitions. [2018-07-23 15:23:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2018-07-23 15:23:45,792 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:45,792 INFO L353 BasicCegarLoop]: trace histogram [190, 189, 1, 1, 1] [2018-07-23 15:23:45,792 INFO L414 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:45,793 INFO L82 PathProgramCache]: Analyzing trace with hash 90977049, now seen corresponding path program 189 times [2018-07-23 15:23:45,793 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:46,897 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 15:23:46,898 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:46,898 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [191] total 191 [2018-07-23 15:23:46,898 INFO L450 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-07-23 15:23:46,901 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-07-23 15:23:46,903 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2018-07-23 15:23:46,903 INFO L87 Difference]: Start difference. First operand 383 states and 383 transitions. Second operand 192 states. [2018-07-23 15:23:47,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:47,777 INFO L93 Difference]: Finished difference Result 387 states and 387 transitions. [2018-07-23 15:23:47,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2018-07-23 15:23:47,778 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 382 [2018-07-23 15:23:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:47,778 INFO L225 Difference]: With dead ends: 387 [2018-07-23 15:23:47,778 INFO L226 Difference]: Without dead ends: 385 [2018-07-23 15:23:47,780 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 15:23:47,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2018-07-23 15:23:47,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2018-07-23 15:23:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2018-07-23 15:23:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 385 transitions. [2018-07-23 15:23:47,784 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 385 transitions. Word has length 382 [2018-07-23 15:23:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:47,785 INFO L471 AbstractCegarLoop]: Abstraction has 385 states and 385 transitions. [2018-07-23 15:23:47,785 INFO L472 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-07-23 15:23:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 385 transitions. [2018-07-23 15:23:47,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2018-07-23 15:23:47,786 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:47,786 INFO L353 BasicCegarLoop]: trace histogram [191, 190, 1, 1, 1] [2018-07-23 15:23:47,786 INFO L414 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:47,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1529650259, now seen corresponding path program 190 times [2018-07-23 15:23:47,786 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:48,946 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 15:23:48,946 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:48,946 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [192] total 192 [2018-07-23 15:23:48,947 INFO L450 AbstractCegarLoop]: Interpolant automaton has 193 states [2018-07-23 15:23:48,948 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2018-07-23 15:23:48,949 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-07-23 15:23:48,950 INFO L87 Difference]: Start difference. First operand 385 states and 385 transitions. Second operand 193 states. [2018-07-23 15:23:50,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:50,789 INFO L93 Difference]: Finished difference Result 389 states and 389 transitions. [2018-07-23 15:23:50,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2018-07-23 15:23:50,789 INFO L78 Accepts]: Start accepts. Automaton has 193 states. Word has length 384 [2018-07-23 15:23:50,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:50,790 INFO L225 Difference]: With dead ends: 389 [2018-07-23 15:23:50,790 INFO L226 Difference]: Without dead ends: 387 [2018-07-23 15:23:50,791 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-07-23 15:23:50,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-07-23 15:23:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2018-07-23 15:23:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2018-07-23 15:23:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2018-07-23 15:23:50,795 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 384 [2018-07-23 15:23:50,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:50,796 INFO L471 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2018-07-23 15:23:50,796 INFO L472 AbstractCegarLoop]: Interpolant automaton has 193 states. [2018-07-23 15:23:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2018-07-23 15:23:50,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-07-23 15:23:50,797 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:50,797 INFO L353 BasicCegarLoop]: trace histogram [192, 191, 1, 1, 1] [2018-07-23 15:23:50,798 INFO L414 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:50,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1115135757, now seen corresponding path program 191 times [2018-07-23 15:23:50,798 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:51,914 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 15:23:51,915 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:51,915 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [193] total 193 [2018-07-23 15:23:51,915 INFO L450 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-07-23 15:23:51,919 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-07-23 15:23:51,923 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18721, Invalid=18721, Unknown=0, NotChecked=0, Total=37442 [2018-07-23 15:23:51,923 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand 194 states. [2018-07-23 15:23:54,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:54,154 INFO L93 Difference]: Finished difference Result 391 states and 391 transitions. [2018-07-23 15:23:54,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2018-07-23 15:23:54,154 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 386 [2018-07-23 15:23:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:54,155 INFO L225 Difference]: With dead ends: 391 [2018-07-23 15:23:54,155 INFO L226 Difference]: Without dead ends: 389 [2018-07-23 15:23:54,161 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 15:23:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2018-07-23 15:23:54,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2018-07-23 15:23:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2018-07-23 15:23:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 389 transitions. [2018-07-23 15:23:54,166 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 389 transitions. Word has length 386 [2018-07-23 15:23:54,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:54,166 INFO L471 AbstractCegarLoop]: Abstraction has 389 states and 389 transitions. [2018-07-23 15:23:54,166 INFO L472 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-07-23 15:23:54,166 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 389 transitions. [2018-07-23 15:23:54,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-07-23 15:23:54,168 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:54,168 INFO L353 BasicCegarLoop]: trace histogram [193, 192, 1, 1, 1] [2018-07-23 15:23:54,168 INFO L414 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:54,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2096309433, now seen corresponding path program 192 times [2018-07-23 15:23:54,169 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:55,471 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 15:23:55,471 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:55,471 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [194] total 194 [2018-07-23 15:23:55,471 INFO L450 AbstractCegarLoop]: Interpolant automaton has 195 states [2018-07-23 15:23:55,473 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2018-07-23 15:23:55,474 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18915, Invalid=18915, Unknown=0, NotChecked=0, Total=37830 [2018-07-23 15:23:55,474 INFO L87 Difference]: Start difference. First operand 389 states and 389 transitions. Second operand 195 states. [2018-07-23 15:23:57,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:57,371 INFO L93 Difference]: Finished difference Result 393 states and 393 transitions. [2018-07-23 15:23:57,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2018-07-23 15:23:57,371 INFO L78 Accepts]: Start accepts. Automaton has 195 states. Word has length 388 [2018-07-23 15:23:57,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:57,372 INFO L225 Difference]: With dead ends: 393 [2018-07-23 15:23:57,372 INFO L226 Difference]: Without dead ends: 391 [2018-07-23 15:23:57,373 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=18915, Invalid=18915, Unknown=0, NotChecked=0, Total=37830 [2018-07-23 15:23:57,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2018-07-23 15:23:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2018-07-23 15:23:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2018-07-23 15:23:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 391 transitions. [2018-07-23 15:23:57,377 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 391 transitions. Word has length 388 [2018-07-23 15:23:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:57,377 INFO L471 AbstractCegarLoop]: Abstraction has 391 states and 391 transitions. [2018-07-23 15:23:57,377 INFO L472 AbstractCegarLoop]: Interpolant automaton has 195 states. [2018-07-23 15:23:57,377 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 391 transitions. [2018-07-23 15:23:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2018-07-23 15:23:57,378 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:57,378 INFO L353 BasicCegarLoop]: trace histogram [194, 193, 1, 1, 1] [2018-07-23 15:23:57,379 INFO L414 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:57,379 INFO L82 PathProgramCache]: Analyzing trace with hash -213651199, now seen corresponding path program 193 times [2018-07-23 15:23:57,379 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:58,631 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 15:23:58,632 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:58,632 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [195] total 195 [2018-07-23 15:23:58,632 INFO L450 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-07-23 15:23:58,635 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-07-23 15:23:58,637 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19110, Invalid=19110, Unknown=0, NotChecked=0, Total=38220 [2018-07-23 15:23:58,638 INFO L87 Difference]: Start difference. First operand 391 states and 391 transitions. Second operand 196 states. [2018-07-23 15:24:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:00,430 INFO L93 Difference]: Finished difference Result 395 states and 395 transitions. [2018-07-23 15:24:00,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2018-07-23 15:24:00,431 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 390 [2018-07-23 15:24:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:00,431 INFO L225 Difference]: With dead ends: 395 [2018-07-23 15:24:00,431 INFO L226 Difference]: Without dead ends: 393 [2018-07-23 15:24:00,434 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=19110, Invalid=19110, Unknown=0, NotChecked=0, Total=38220 [2018-07-23 15:24:00,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-07-23 15:24:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2018-07-23 15:24:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-07-23 15:24:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 393 transitions. [2018-07-23 15:24:00,438 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 393 transitions. Word has length 390 [2018-07-23 15:24:00,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:00,438 INFO L471 AbstractCegarLoop]: Abstraction has 393 states and 393 transitions. [2018-07-23 15:24:00,438 INFO L472 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-07-23 15:24:00,438 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 393 transitions. [2018-07-23 15:24:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2018-07-23 15:24:00,439 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:00,439 INFO L353 BasicCegarLoop]: trace histogram [195, 194, 1, 1, 1] [2018-07-23 15:24:00,439 INFO L414 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:00,439 INFO L82 PathProgramCache]: Analyzing trace with hash 839680059, now seen corresponding path program 194 times [2018-07-23 15:24:00,440 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:01,692 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 15:24:01,693 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:01,693 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [196] total 196 [2018-07-23 15:24:01,693 INFO L450 AbstractCegarLoop]: Interpolant automaton has 197 states [2018-07-23 15:24:01,695 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2018-07-23 15:24:01,696 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2018-07-23 15:24:01,696 INFO L87 Difference]: Start difference. First operand 393 states and 393 transitions. Second operand 197 states. [2018-07-23 15:24:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:02,771 INFO L93 Difference]: Finished difference Result 397 states and 397 transitions. [2018-07-23 15:24:02,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2018-07-23 15:24:02,771 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 392 [2018-07-23 15:24:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:02,771 INFO L225 Difference]: With dead ends: 397 [2018-07-23 15:24:02,772 INFO L226 Difference]: Without dead ends: 395 [2018-07-23 15:24:02,773 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2018-07-23 15:24:02,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2018-07-23 15:24:02,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2018-07-23 15:24:02,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2018-07-23 15:24:02,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 395 transitions. [2018-07-23 15:24:02,777 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 395 transitions. Word has length 392 [2018-07-23 15:24:02,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:02,777 INFO L471 AbstractCegarLoop]: Abstraction has 395 states and 395 transitions. [2018-07-23 15:24:02,777 INFO L472 AbstractCegarLoop]: Interpolant automaton has 197 states. [2018-07-23 15:24:02,777 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 395 transitions. [2018-07-23 15:24:02,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-07-23 15:24:02,778 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:02,778 INFO L353 BasicCegarLoop]: trace histogram [196, 195, 1, 1, 1] [2018-07-23 15:24:02,778 INFO L414 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:02,779 INFO L82 PathProgramCache]: Analyzing trace with hash -521262859, now seen corresponding path program 195 times [2018-07-23 15:24:02,779 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:03,968 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 15:24:03,968 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:03,968 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [197] total 197 [2018-07-23 15:24:03,968 INFO L450 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-07-23 15:24:03,972 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-07-23 15:24:03,974 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19503, Invalid=19503, Unknown=0, NotChecked=0, Total=39006 [2018-07-23 15:24:03,974 INFO L87 Difference]: Start difference. First operand 395 states and 395 transitions. Second operand 198 states. [2018-07-23 15:24:04,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:04,868 INFO L93 Difference]: Finished difference Result 399 states and 399 transitions. [2018-07-23 15:24:04,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2018-07-23 15:24:04,868 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 394 [2018-07-23 15:24:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:04,869 INFO L225 Difference]: With dead ends: 399 [2018-07-23 15:24:04,869 INFO L226 Difference]: Without dead ends: 397 [2018-07-23 15:24:04,871 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=19503, Invalid=19503, Unknown=0, NotChecked=0, Total=39006 [2018-07-23 15:24:04,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2018-07-23 15:24:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2018-07-23 15:24:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2018-07-23 15:24:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 397 transitions. [2018-07-23 15:24:04,875 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 397 transitions. Word has length 394 [2018-07-23 15:24:04,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:04,875 INFO L471 AbstractCegarLoop]: Abstraction has 397 states and 397 transitions. [2018-07-23 15:24:04,876 INFO L472 AbstractCegarLoop]: Interpolant automaton has 198 states. [2018-07-23 15:24:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 397 transitions. [2018-07-23 15:24:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2018-07-23 15:24:04,877 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:04,877 INFO L353 BasicCegarLoop]: trace histogram [197, 196, 1, 1, 1] [2018-07-23 15:24:04,877 INFO L414 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:04,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1577618223, now seen corresponding path program 196 times [2018-07-23 15:24:04,877 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:06,150 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 15:24:06,150 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:06,150 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [198] total 198 [2018-07-23 15:24:06,151 INFO L450 AbstractCegarLoop]: Interpolant automaton has 199 states [2018-07-23 15:24:06,154 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2018-07-23 15:24:06,156 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2018-07-23 15:24:06,156 INFO L87 Difference]: Start difference. First operand 397 states and 397 transitions. Second operand 199 states. [2018-07-23 15:24:07,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:07,052 INFO L93 Difference]: Finished difference Result 401 states and 401 transitions. [2018-07-23 15:24:07,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2018-07-23 15:24:07,052 INFO L78 Accepts]: Start accepts. Automaton has 199 states. Word has length 396 [2018-07-23 15:24:07,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:07,053 INFO L225 Difference]: With dead ends: 401 [2018-07-23 15:24:07,053 INFO L226 Difference]: Without dead ends: 399 [2018-07-23 15:24:07,054 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2018-07-23 15:24:07,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-07-23 15:24:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2018-07-23 15:24:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2018-07-23 15:24:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 399 transitions. [2018-07-23 15:24:07,058 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 399 transitions. Word has length 396 [2018-07-23 15:24:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:07,058 INFO L471 AbstractCegarLoop]: Abstraction has 399 states and 399 transitions. [2018-07-23 15:24:07,058 INFO L472 AbstractCegarLoop]: Interpolant automaton has 199 states. [2018-07-23 15:24:07,058 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 399 transitions. [2018-07-23 15:24:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-07-23 15:24:07,059 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:07,059 INFO L353 BasicCegarLoop]: trace histogram [198, 197, 1, 1, 1] [2018-07-23 15:24:07,059 INFO L414 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:07,060 INFO L82 PathProgramCache]: Analyzing trace with hash -32291095, now seen corresponding path program 197 times [2018-07-23 15:24:07,060 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:08,398 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 15:24:08,399 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:08,399 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [199] total 199 [2018-07-23 15:24:08,399 INFO L450 AbstractCegarLoop]: Interpolant automaton has 200 states [2018-07-23 15:24:08,403 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2018-07-23 15:24:08,406 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19900, Invalid=19900, Unknown=0, NotChecked=0, Total=39800 [2018-07-23 15:24:08,407 INFO L87 Difference]: Start difference. First operand 399 states and 399 transitions. Second operand 200 states. [2018-07-23 15:24:09,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:09,491 INFO L93 Difference]: Finished difference Result 403 states and 403 transitions. [2018-07-23 15:24:09,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2018-07-23 15:24:09,491 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 398 [2018-07-23 15:24:09,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:09,492 INFO L225 Difference]: With dead ends: 403 [2018-07-23 15:24:09,492 INFO L226 Difference]: Without dead ends: 401 [2018-07-23 15:24:09,494 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=19900, Invalid=19900, Unknown=0, NotChecked=0, Total=39800 [2018-07-23 15:24:09,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2018-07-23 15:24:09,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2018-07-23 15:24:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2018-07-23 15:24:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 401 transitions. [2018-07-23 15:24:09,498 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 401 transitions. Word has length 398 [2018-07-23 15:24:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:09,498 INFO L471 AbstractCegarLoop]: Abstraction has 401 states and 401 transitions. [2018-07-23 15:24:09,498 INFO L472 AbstractCegarLoop]: Interpolant automaton has 200 states. [2018-07-23 15:24:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 401 transitions. [2018-07-23 15:24:09,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2018-07-23 15:24:09,499 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:09,500 INFO L353 BasicCegarLoop]: trace histogram [199, 198, 1, 1, 1] [2018-07-23 15:24:09,500 INFO L414 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:09,500 INFO L82 PathProgramCache]: Analyzing trace with hash -966919133, now seen corresponding path program 198 times [2018-07-23 15:24:09,500 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:10,744 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 15:24:10,745 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:10,745 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [200] total 200 [2018-07-23 15:24:10,745 INFO L450 AbstractCegarLoop]: Interpolant automaton has 201 states [2018-07-23 15:24:10,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2018-07-23 15:24:10,751 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20100, Invalid=20100, Unknown=0, NotChecked=0, Total=40200 [2018-07-23 15:24:10,751 INFO L87 Difference]: Start difference. First operand 401 states and 401 transitions. Second operand 201 states. [2018-07-23 15:24:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:12,234 INFO L93 Difference]: Finished difference Result 405 states and 405 transitions. [2018-07-23 15:24:12,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2018-07-23 15:24:12,234 INFO L78 Accepts]: Start accepts. Automaton has 201 states. Word has length 400 [2018-07-23 15:24:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:12,235 INFO L225 Difference]: With dead ends: 405 [2018-07-23 15:24:12,235 INFO L226 Difference]: Without dead ends: 403 [2018-07-23 15:24:12,237 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 15:24:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2018-07-23 15:24:12,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2018-07-23 15:24:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-07-23 15:24:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 403 transitions. [2018-07-23 15:24:12,241 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 403 transitions. Word has length 400 [2018-07-23 15:24:12,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:12,242 INFO L471 AbstractCegarLoop]: Abstraction has 403 states and 403 transitions. [2018-07-23 15:24:12,242 INFO L472 AbstractCegarLoop]: Interpolant automaton has 201 states. [2018-07-23 15:24:12,242 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 403 transitions. [2018-07-23 15:24:12,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-07-23 15:24:12,243 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:12,243 INFO L353 BasicCegarLoop]: trace histogram [200, 199, 1, 1, 1] [2018-07-23 15:24:12,243 INFO L414 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:12,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1496298787, now seen corresponding path program 199 times [2018-07-23 15:24:12,243 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:13,506 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 15:24:13,506 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:13,506 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [201] total 201 [2018-07-23 15:24:13,506 INFO L450 AbstractCegarLoop]: Interpolant automaton has 202 states [2018-07-23 15:24:13,510 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2018-07-23 15:24:13,512 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20301, Invalid=20301, Unknown=0, NotChecked=0, Total=40602 [2018-07-23 15:24:13,513 INFO L87 Difference]: Start difference. First operand 403 states and 403 transitions. Second operand 202 states. [2018-07-23 15:24:15,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:15,490 INFO L93 Difference]: Finished difference Result 407 states and 407 transitions. [2018-07-23 15:24:15,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2018-07-23 15:24:15,490 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 402 [2018-07-23 15:24:15,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:15,491 INFO L225 Difference]: With dead ends: 407 [2018-07-23 15:24:15,491 INFO L226 Difference]: Without dead ends: 405 [2018-07-23 15:24:15,493 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 15:24:15,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2018-07-23 15:24:15,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 405. [2018-07-23 15:24:15,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2018-07-23 15:24:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 405 transitions. [2018-07-23 15:24:15,497 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 405 transitions. Word has length 402 [2018-07-23 15:24:15,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:15,497 INFO L471 AbstractCegarLoop]: Abstraction has 405 states and 405 transitions. [2018-07-23 15:24:15,497 INFO L472 AbstractCegarLoop]: Interpolant automaton has 202 states. [2018-07-23 15:24:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 405 transitions. [2018-07-23 15:24:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2018-07-23 15:24:15,499 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:15,499 INFO L353 BasicCegarLoop]: trace histogram [201, 200, 1, 1, 1] [2018-07-23 15:24:15,499 INFO L414 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:15,499 INFO L82 PathProgramCache]: Analyzing trace with hash 870961943, now seen corresponding path program 200 times [2018-07-23 15:24:15,499 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:16,767 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 15:24:16,767 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:16,767 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [202] total 202 [2018-07-23 15:24:16,768 INFO L450 AbstractCegarLoop]: Interpolant automaton has 203 states [2018-07-23 15:24:16,771 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2018-07-23 15:24:16,773 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2018-07-23 15:24:16,773 INFO L87 Difference]: Start difference. First operand 405 states and 405 transitions. Second operand 203 states. [2018-07-23 15:24:19,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:19,161 INFO L93 Difference]: Finished difference Result 409 states and 409 transitions. [2018-07-23 15:24:19,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2018-07-23 15:24:19,161 INFO L78 Accepts]: Start accepts. Automaton has 203 states. Word has length 404 [2018-07-23 15:24:19,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:19,161 INFO L225 Difference]: With dead ends: 409 [2018-07-23 15:24:19,162 INFO L226 Difference]: Without dead ends: 407 [2018-07-23 15:24:19,163 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2018-07-23 15:24:19,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2018-07-23 15:24:19,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2018-07-23 15:24:19,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-07-23 15:24:19,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 407 transitions. [2018-07-23 15:24:19,166 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 407 transitions. Word has length 404 [2018-07-23 15:24:19,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:19,167 INFO L471 AbstractCegarLoop]: Abstraction has 407 states and 407 transitions. [2018-07-23 15:24:19,167 INFO L472 AbstractCegarLoop]: Interpolant automaton has 203 states. [2018-07-23 15:24:19,167 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 407 transitions. [2018-07-23 15:24:19,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-07-23 15:24:19,169 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:19,169 INFO L353 BasicCegarLoop]: trace histogram [202, 201, 1, 1, 1] [2018-07-23 15:24:19,169 INFO L414 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:19,169 INFO L82 PathProgramCache]: Analyzing trace with hash -524143407, now seen corresponding path program 201 times [2018-07-23 15:24:19,169 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:20,419 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 15:24:20,419 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:20,419 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [203] total 203 [2018-07-23 15:24:20,419 INFO L450 AbstractCegarLoop]: Interpolant automaton has 204 states [2018-07-23 15:24:20,422 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2018-07-23 15:24:20,424 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20706, Invalid=20706, Unknown=0, NotChecked=0, Total=41412 [2018-07-23 15:24:20,425 INFO L87 Difference]: Start difference. First operand 407 states and 407 transitions. Second operand 204 states. [2018-07-23 15:24:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:22,916 INFO L93 Difference]: Finished difference Result 411 states and 411 transitions. [2018-07-23 15:24:22,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2018-07-23 15:24:22,916 INFO L78 Accepts]: Start accepts. Automaton has 204 states. Word has length 406 [2018-07-23 15:24:22,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:22,917 INFO L225 Difference]: With dead ends: 411 [2018-07-23 15:24:22,917 INFO L226 Difference]: Without dead ends: 409 [2018-07-23 15:24:22,920 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 15:24:22,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2018-07-23 15:24:22,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 409. [2018-07-23 15:24:22,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2018-07-23 15:24:22,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 409 transitions. [2018-07-23 15:24:22,924 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 409 transitions. Word has length 406 [2018-07-23 15:24:22,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:22,924 INFO L471 AbstractCegarLoop]: Abstraction has 409 states and 409 transitions. [2018-07-23 15:24:22,924 INFO L472 AbstractCegarLoop]: Interpolant automaton has 204 states. [2018-07-23 15:24:22,924 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 409 transitions. [2018-07-23 15:24:22,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-07-23 15:24:22,925 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:22,925 INFO L353 BasicCegarLoop]: trace histogram [203, 202, 1, 1, 1] [2018-07-23 15:24:22,925 INFO L414 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1190588405, now seen corresponding path program 202 times [2018-07-23 15:24:22,926 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:24,205 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 15:24:24,205 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:24,205 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [204] total 204 [2018-07-23 15:24:24,206 INFO L450 AbstractCegarLoop]: Interpolant automaton has 205 states [2018-07-23 15:24:24,208 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2018-07-23 15:24:24,209 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20910, Invalid=20910, Unknown=0, NotChecked=0, Total=41820 [2018-07-23 15:24:24,209 INFO L87 Difference]: Start difference. First operand 409 states and 409 transitions. Second operand 205 states. [2018-07-23 15:24:25,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:25,333 INFO L93 Difference]: Finished difference Result 413 states and 413 transitions. [2018-07-23 15:24:25,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2018-07-23 15:24:25,333 INFO L78 Accepts]: Start accepts. Automaton has 205 states. Word has length 408 [2018-07-23 15:24:25,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:25,334 INFO L225 Difference]: With dead ends: 413 [2018-07-23 15:24:25,334 INFO L226 Difference]: Without dead ends: 411 [2018-07-23 15:24:25,336 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=20910, Invalid=20910, Unknown=0, NotChecked=0, Total=41820 [2018-07-23 15:24:25,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-07-23 15:24:25,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2018-07-23 15:24:25,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2018-07-23 15:24:25,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 411 transitions. [2018-07-23 15:24:25,339 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 411 transitions. Word has length 408 [2018-07-23 15:24:25,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:25,340 INFO L471 AbstractCegarLoop]: Abstraction has 411 states and 411 transitions. [2018-07-23 15:24:25,340 INFO L472 AbstractCegarLoop]: Interpolant automaton has 205 states. [2018-07-23 15:24:25,340 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 411 transitions. [2018-07-23 15:24:25,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2018-07-23 15:24:25,341 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:25,341 INFO L353 BasicCegarLoop]: trace histogram [204, 203, 1, 1, 1] [2018-07-23 15:24:25,341 INFO L414 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:25,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1694104379, now seen corresponding path program 203 times [2018-07-23 15:24:25,341 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:26,573 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 15:24:26,573 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:26,574 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [205] total 205 [2018-07-23 15:24:26,574 INFO L450 AbstractCegarLoop]: Interpolant automaton has 206 states [2018-07-23 15:24:26,577 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2018-07-23 15:24:26,579 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21115, Invalid=21115, Unknown=0, NotChecked=0, Total=42230 [2018-07-23 15:24:26,579 INFO L87 Difference]: Start difference. First operand 411 states and 411 transitions. Second operand 206 states. [2018-07-23 15:24:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:27,666 INFO L93 Difference]: Finished difference Result 415 states and 415 transitions. [2018-07-23 15:24:27,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2018-07-23 15:24:27,666 INFO L78 Accepts]: Start accepts. Automaton has 206 states. Word has length 410 [2018-07-23 15:24:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:27,667 INFO L225 Difference]: With dead ends: 415 [2018-07-23 15:24:27,667 INFO L226 Difference]: Without dead ends: 413 [2018-07-23 15:24:27,670 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 15:24:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2018-07-23 15:24:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2018-07-23 15:24:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2018-07-23 15:24:27,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 413 transitions. [2018-07-23 15:24:27,674 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 413 transitions. Word has length 410 [2018-07-23 15:24:27,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:27,674 INFO L471 AbstractCegarLoop]: Abstraction has 413 states and 413 transitions. [2018-07-23 15:24:27,674 INFO L472 AbstractCegarLoop]: Interpolant automaton has 206 states. [2018-07-23 15:24:27,674 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 413 transitions. [2018-07-23 15:24:27,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-07-23 15:24:27,675 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:27,676 INFO L353 BasicCegarLoop]: trace histogram [205, 204, 1, 1, 1] [2018-07-23 15:24:27,676 INFO L414 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:27,676 INFO L82 PathProgramCache]: Analyzing trace with hash -241650945, now seen corresponding path program 204 times [2018-07-23 15:24:27,676 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:28,994 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 15:24:28,994 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:28,995 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [206] total 206 [2018-07-23 15:24:28,995 INFO L450 AbstractCegarLoop]: Interpolant automaton has 207 states [2018-07-23 15:24:28,996 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2018-07-23 15:24:28,997 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21321, Invalid=21321, Unknown=0, NotChecked=0, Total=42642 [2018-07-23 15:24:28,998 INFO L87 Difference]: Start difference. First operand 413 states and 413 transitions. Second operand 207 states. [2018-07-23 15:24:31,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:31,072 INFO L93 Difference]: Finished difference Result 417 states and 417 transitions. [2018-07-23 15:24:31,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2018-07-23 15:24:31,073 INFO L78 Accepts]: Start accepts. Automaton has 207 states. Word has length 412 [2018-07-23 15:24:31,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:31,073 INFO L225 Difference]: With dead ends: 417 [2018-07-23 15:24:31,074 INFO L226 Difference]: Without dead ends: 415 [2018-07-23 15:24:31,075 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=21321, Invalid=21321, Unknown=0, NotChecked=0, Total=42642 [2018-07-23 15:24:31,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-07-23 15:24:31,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-07-23 15:24:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-07-23 15:24:31,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 415 transitions. [2018-07-23 15:24:31,080 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 415 transitions. Word has length 412 [2018-07-23 15:24:31,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:31,080 INFO L471 AbstractCegarLoop]: Abstraction has 415 states and 415 transitions. [2018-07-23 15:24:31,080 INFO L472 AbstractCegarLoop]: Interpolant automaton has 207 states. [2018-07-23 15:24:31,081 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 415 transitions. [2018-07-23 15:24:31,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2018-07-23 15:24:31,082 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:31,082 INFO L353 BasicCegarLoop]: trace histogram [206, 205, 1, 1, 1] [2018-07-23 15:24:31,082 INFO L414 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:31,082 INFO L82 PathProgramCache]: Analyzing trace with hash -298272071, now seen corresponding path program 205 times [2018-07-23 15:24:31,082 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:32,375 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 15:24:32,376 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:32,376 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [207] total 207 [2018-07-23 15:24:32,376 INFO L450 AbstractCegarLoop]: Interpolant automaton has 208 states [2018-07-23 15:24:32,379 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2018-07-23 15:24:32,382 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21528, Invalid=21528, Unknown=0, NotChecked=0, Total=43056 [2018-07-23 15:24:32,382 INFO L87 Difference]: Start difference. First operand 415 states and 415 transitions. Second operand 208 states. [2018-07-23 15:24:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:35,024 INFO L93 Difference]: Finished difference Result 419 states and 419 transitions. [2018-07-23 15:24:35,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2018-07-23 15:24:35,024 INFO L78 Accepts]: Start accepts. Automaton has 208 states. Word has length 414 [2018-07-23 15:24:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:35,025 INFO L225 Difference]: With dead ends: 419 [2018-07-23 15:24:35,025 INFO L226 Difference]: Without dead ends: 417 [2018-07-23 15:24:35,028 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 15:24:35,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2018-07-23 15:24:35,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 417. [2018-07-23 15:24:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2018-07-23 15:24:35,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 417 transitions. [2018-07-23 15:24:35,032 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 417 transitions. Word has length 414 [2018-07-23 15:24:35,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:35,032 INFO L471 AbstractCegarLoop]: Abstraction has 417 states and 417 transitions. [2018-07-23 15:24:35,032 INFO L472 AbstractCegarLoop]: Interpolant automaton has 208 states. [2018-07-23 15:24:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 417 transitions. [2018-07-23 15:24:35,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2018-07-23 15:24:35,033 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:35,034 INFO L353 BasicCegarLoop]: trace histogram [207, 206, 1, 1, 1] [2018-07-23 15:24:35,034 INFO L414 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:35,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1123400691, now seen corresponding path program 206 times [2018-07-23 15:24:35,034 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:36,360 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 15:24:36,360 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:36,361 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [208] total 208 [2018-07-23 15:24:36,361 INFO L450 AbstractCegarLoop]: Interpolant automaton has 209 states [2018-07-23 15:24:36,363 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2018-07-23 15:24:36,364 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2018-07-23 15:24:36,364 INFO L87 Difference]: Start difference. First operand 417 states and 417 transitions. Second operand 209 states. [2018-07-23 15:24:37,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:37,501 INFO L93 Difference]: Finished difference Result 421 states and 421 transitions. [2018-07-23 15:24:37,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2018-07-23 15:24:37,502 INFO L78 Accepts]: Start accepts. Automaton has 209 states. Word has length 416 [2018-07-23 15:24:37,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:37,502 INFO L225 Difference]: With dead ends: 421 [2018-07-23 15:24:37,502 INFO L226 Difference]: Without dead ends: 419 [2018-07-23 15:24:37,504 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2018-07-23 15:24:37,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2018-07-23 15:24:37,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 419. [2018-07-23 15:24:37,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2018-07-23 15:24:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 419 transitions. [2018-07-23 15:24:37,508 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 419 transitions. Word has length 416 [2018-07-23 15:24:37,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:37,509 INFO L471 AbstractCegarLoop]: Abstraction has 419 states and 419 transitions. [2018-07-23 15:24:37,509 INFO L472 AbstractCegarLoop]: Interpolant automaton has 209 states. [2018-07-23 15:24:37,509 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 419 transitions. [2018-07-23 15:24:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-07-23 15:24:37,510 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:37,510 INFO L353 BasicCegarLoop]: trace histogram [208, 207, 1, 1, 1] [2018-07-23 15:24:37,510 INFO L414 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:37,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1551324845, now seen corresponding path program 207 times [2018-07-23 15:24:37,510 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:38,852 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 15:24:38,852 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:38,853 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [209] total 209 [2018-07-23 15:24:38,853 INFO L450 AbstractCegarLoop]: Interpolant automaton has 210 states [2018-07-23 15:24:38,857 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2018-07-23 15:24:38,859 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21945, Invalid=21945, Unknown=0, NotChecked=0, Total=43890 [2018-07-23 15:24:38,859 INFO L87 Difference]: Start difference. First operand 419 states and 419 transitions. Second operand 210 states. [2018-07-23 15:24:41,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:41,794 INFO L93 Difference]: Finished difference Result 423 states and 423 transitions. [2018-07-23 15:24:41,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2018-07-23 15:24:41,794 INFO L78 Accepts]: Start accepts. Automaton has 210 states. Word has length 418 [2018-07-23 15:24:41,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:41,795 INFO L225 Difference]: With dead ends: 423 [2018-07-23 15:24:41,795 INFO L226 Difference]: Without dead ends: 421 [2018-07-23 15:24:41,798 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 15:24:41,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2018-07-23 15:24:41,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2018-07-23 15:24:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2018-07-23 15:24:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 421 transitions. [2018-07-23 15:24:41,801 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 421 transitions. Word has length 418 [2018-07-23 15:24:41,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:41,802 INFO L471 AbstractCegarLoop]: Abstraction has 421 states and 421 transitions. [2018-07-23 15:24:41,802 INFO L472 AbstractCegarLoop]: Interpolant automaton has 210 states. [2018-07-23 15:24:41,802 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 421 transitions. [2018-07-23 15:24:41,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2018-07-23 15:24:41,803 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:41,803 INFO L353 BasicCegarLoop]: trace histogram [209, 208, 1, 1, 1] [2018-07-23 15:24:41,803 INFO L414 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:41,803 INFO L82 PathProgramCache]: Analyzing trace with hash 469576423, now seen corresponding path program 208 times [2018-07-23 15:24:41,803 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:43,194 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 15:24:43,195 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:43,195 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [210] total 210 [2018-07-23 15:24:43,195 INFO L450 AbstractCegarLoop]: Interpolant automaton has 211 states [2018-07-23 15:24:43,198 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2018-07-23 15:24:43,200 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2018-07-23 15:24:43,200 INFO L87 Difference]: Start difference. First operand 421 states and 421 transitions. Second operand 211 states. [2018-07-23 15:24:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:44,604 INFO L93 Difference]: Finished difference Result 425 states and 425 transitions. [2018-07-23 15:24:44,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2018-07-23 15:24:44,605 INFO L78 Accepts]: Start accepts. Automaton has 211 states. Word has length 420 [2018-07-23 15:24:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:44,605 INFO L225 Difference]: With dead ends: 425 [2018-07-23 15:24:44,605 INFO L226 Difference]: Without dead ends: 423 [2018-07-23 15:24:44,608 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2018-07-23 15:24:44,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-07-23 15:24:44,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2018-07-23 15:24:44,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2018-07-23 15:24:44,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 423 transitions. [2018-07-23 15:24:44,611 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 423 transitions. Word has length 420 [2018-07-23 15:24:44,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:44,612 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 423 transitions. [2018-07-23 15:24:44,612 INFO L472 AbstractCegarLoop]: Interpolant automaton has 211 states. [2018-07-23 15:24:44,612 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 423 transitions. [2018-07-23 15:24:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-07-23 15:24:44,613 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:44,613 INFO L353 BasicCegarLoop]: trace histogram [210, 209, 1, 1, 1] [2018-07-23 15:24:44,613 INFO L414 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:44,613 INFO L82 PathProgramCache]: Analyzing trace with hash 291428513, now seen corresponding path program 209 times [2018-07-23 15:24:44,614 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:45,944 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 15:24:45,944 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:45,945 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [211] total 211 [2018-07-23 15:24:45,945 INFO L450 AbstractCegarLoop]: Interpolant automaton has 212 states [2018-07-23 15:24:45,948 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2018-07-23 15:24:45,950 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22366, Invalid=22366, Unknown=0, NotChecked=0, Total=44732 [2018-07-23 15:24:45,950 INFO L87 Difference]: Start difference. First operand 423 states and 423 transitions. Second operand 212 states. [2018-07-23 15:24:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:47,964 INFO L93 Difference]: Finished difference Result 427 states and 427 transitions. [2018-07-23 15:24:47,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2018-07-23 15:24:47,964 INFO L78 Accepts]: Start accepts. Automaton has 212 states. Word has length 422 [2018-07-23 15:24:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:47,965 INFO L225 Difference]: With dead ends: 427 [2018-07-23 15:24:47,965 INFO L226 Difference]: Without dead ends: 425 [2018-07-23 15:24:47,968 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 15:24:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2018-07-23 15:24:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2018-07-23 15:24:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2018-07-23 15:24:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 425 transitions. [2018-07-23 15:24:47,972 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 425 transitions. Word has length 422 [2018-07-23 15:24:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:47,972 INFO L471 AbstractCegarLoop]: Abstraction has 425 states and 425 transitions. [2018-07-23 15:24:47,973 INFO L472 AbstractCegarLoop]: Interpolant automaton has 212 states. [2018-07-23 15:24:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 425 transitions. [2018-07-23 15:24:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2018-07-23 15:24:47,974 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:47,974 INFO L353 BasicCegarLoop]: trace histogram [211, 210, 1, 1, 1] [2018-07-23 15:24:47,974 INFO L414 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:47,974 INFO L82 PathProgramCache]: Analyzing trace with hash 889978843, now seen corresponding path program 210 times [2018-07-23 15:24:47,974 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:49,410 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 15:24:49,410 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:49,410 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [212] total 212 [2018-07-23 15:24:49,411 INFO L450 AbstractCegarLoop]: Interpolant automaton has 213 states [2018-07-23 15:24:49,414 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2018-07-23 15:24:49,418 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2018-07-23 15:24:49,418 INFO L87 Difference]: Start difference. First operand 425 states and 425 transitions. Second operand 213 states. [2018-07-23 15:24:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:52,126 INFO L93 Difference]: Finished difference Result 429 states and 429 transitions. [2018-07-23 15:24:52,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2018-07-23 15:24:52,126 INFO L78 Accepts]: Start accepts. Automaton has 213 states. Word has length 424 [2018-07-23 15:24:52,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:52,127 INFO L225 Difference]: With dead ends: 429 [2018-07-23 15:24:52,127 INFO L226 Difference]: Without dead ends: 427 [2018-07-23 15:24:52,130 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 15:24:52,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-07-23 15:24:52,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2018-07-23 15:24:52,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2018-07-23 15:24:52,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 427 transitions. [2018-07-23 15:24:52,136 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 427 transitions. Word has length 424 [2018-07-23 15:24:52,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:52,136 INFO L471 AbstractCegarLoop]: Abstraction has 427 states and 427 transitions. [2018-07-23 15:24:52,136 INFO L472 AbstractCegarLoop]: Interpolant automaton has 213 states. [2018-07-23 15:24:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 427 transitions. [2018-07-23 15:24:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2018-07-23 15:24:52,138 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:52,139 INFO L353 BasicCegarLoop]: trace histogram [212, 211, 1, 1, 1] [2018-07-23 15:24:52,139 INFO L414 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:52,139 INFO L82 PathProgramCache]: Analyzing trace with hash 571228309, now seen corresponding path program 211 times [2018-07-23 15:24:52,139 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:53,499 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 15:24:53,499 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:53,499 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [213] total 213 [2018-07-23 15:24:53,499 INFO L450 AbstractCegarLoop]: Interpolant automaton has 214 states [2018-07-23 15:24:53,503 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2018-07-23 15:24:53,506 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22791, Invalid=22791, Unknown=0, NotChecked=0, Total=45582 [2018-07-23 15:24:53,506 INFO L87 Difference]: Start difference. First operand 427 states and 427 transitions. Second operand 214 states. [2018-07-23 15:24:55,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:55,308 INFO L93 Difference]: Finished difference Result 431 states and 431 transitions. [2018-07-23 15:24:55,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2018-07-23 15:24:55,308 INFO L78 Accepts]: Start accepts. Automaton has 214 states. Word has length 426 [2018-07-23 15:24:55,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:55,309 INFO L225 Difference]: With dead ends: 431 [2018-07-23 15:24:55,309 INFO L226 Difference]: Without dead ends: 429 [2018-07-23 15:24:55,310 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 15:24:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2018-07-23 15:24:55,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2018-07-23 15:24:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2018-07-23 15:24:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 429 transitions. [2018-07-23 15:24:55,314 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 429 transitions. Word has length 426 [2018-07-23 15:24:55,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:55,314 INFO L471 AbstractCegarLoop]: Abstraction has 429 states and 429 transitions. [2018-07-23 15:24:55,314 INFO L472 AbstractCegarLoop]: Interpolant automaton has 214 states. [2018-07-23 15:24:55,314 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 429 transitions. [2018-07-23 15:24:55,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2018-07-23 15:24:55,316 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:55,316 INFO L353 BasicCegarLoop]: trace histogram [213, 212, 1, 1, 1] [2018-07-23 15:24:55,316 INFO L414 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:55,316 INFO L82 PathProgramCache]: Analyzing trace with hash -805356849, now seen corresponding path program 212 times [2018-07-23 15:24:55,316 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:56,731 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 15:24:56,731 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:56,731 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [214] total 214 [2018-07-23 15:24:56,732 INFO L450 AbstractCegarLoop]: Interpolant automaton has 215 states [2018-07-23 15:24:56,736 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2018-07-23 15:24:56,739 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23005, Invalid=23005, Unknown=0, NotChecked=0, Total=46010 [2018-07-23 15:24:56,740 INFO L87 Difference]: Start difference. First operand 429 states and 429 transitions. Second operand 215 states. [2018-07-23 15:24:58,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:58,559 INFO L93 Difference]: Finished difference Result 433 states and 433 transitions. [2018-07-23 15:24:58,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2018-07-23 15:24:58,560 INFO L78 Accepts]: Start accepts. Automaton has 215 states. Word has length 428 [2018-07-23 15:24:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:58,561 INFO L225 Difference]: With dead ends: 433 [2018-07-23 15:24:58,561 INFO L226 Difference]: Without dead ends: 431 [2018-07-23 15:24:58,565 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 15:24:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-07-23 15:24:58,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2018-07-23 15:24:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2018-07-23 15:24:58,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 431 transitions. [2018-07-23 15:24:58,570 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 431 transitions. Word has length 428 [2018-07-23 15:24:58,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:58,570 INFO L471 AbstractCegarLoop]: Abstraction has 431 states and 431 transitions. [2018-07-23 15:24:58,570 INFO L472 AbstractCegarLoop]: Interpolant automaton has 215 states. [2018-07-23 15:24:58,570 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 431 transitions. [2018-07-23 15:24:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2018-07-23 15:24:58,572 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:58,572 INFO L353 BasicCegarLoop]: trace histogram [214, 213, 1, 1, 1] [2018-07-23 15:24:58,572 INFO L414 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:58,572 INFO L82 PathProgramCache]: Analyzing trace with hash -853766519, now seen corresponding path program 213 times [2018-07-23 15:24:58,573 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:00,237 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 15:25:00,238 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:00,238 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [215] total 215 [2018-07-23 15:25:00,238 INFO L450 AbstractCegarLoop]: Interpolant automaton has 216 states [2018-07-23 15:25:00,240 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2018-07-23 15:25:00,241 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23220, Invalid=23220, Unknown=0, NotChecked=0, Total=46440 [2018-07-23 15:25:00,241 INFO L87 Difference]: Start difference. First operand 431 states and 431 transitions. Second operand 216 states. [2018-07-23 15:25:03,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:03,038 INFO L93 Difference]: Finished difference Result 435 states and 435 transitions. [2018-07-23 15:25:03,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2018-07-23 15:25:03,039 INFO L78 Accepts]: Start accepts. Automaton has 216 states. Word has length 430 [2018-07-23 15:25:03,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:03,039 INFO L225 Difference]: With dead ends: 435 [2018-07-23 15:25:03,040 INFO L226 Difference]: Without dead ends: 433 [2018-07-23 15:25:03,041 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=23220, Invalid=23220, Unknown=0, NotChecked=0, Total=46440 [2018-07-23 15:25:03,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2018-07-23 15:25:03,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2018-07-23 15:25:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2018-07-23 15:25:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 433 transitions. [2018-07-23 15:25:03,045 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 433 transitions. Word has length 430 [2018-07-23 15:25:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:03,045 INFO L471 AbstractCegarLoop]: Abstraction has 433 states and 433 transitions. [2018-07-23 15:25:03,045 INFO L472 AbstractCegarLoop]: Interpolant automaton has 216 states. [2018-07-23 15:25:03,045 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 433 transitions. [2018-07-23 15:25:03,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-07-23 15:25:03,047 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:03,047 INFO L353 BasicCegarLoop]: trace histogram [215, 214, 1, 1, 1] [2018-07-23 15:25:03,047 INFO L414 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:03,047 INFO L82 PathProgramCache]: Analyzing trace with hash -130819133, now seen corresponding path program 214 times [2018-07-23 15:25:03,047 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:04,444 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 15:25:04,445 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:04,445 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [216] total 216 [2018-07-23 15:25:04,445 INFO L450 AbstractCegarLoop]: Interpolant automaton has 217 states [2018-07-23 15:25:04,449 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 217 interpolants. [2018-07-23 15:25:04,452 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23436, Invalid=23436, Unknown=0, NotChecked=0, Total=46872 [2018-07-23 15:25:04,452 INFO L87 Difference]: Start difference. First operand 433 states and 433 transitions. Second operand 217 states. [2018-07-23 15:25:06,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:06,054 INFO L93 Difference]: Finished difference Result 437 states and 437 transitions. [2018-07-23 15:25:06,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2018-07-23 15:25:06,054 INFO L78 Accepts]: Start accepts. Automaton has 217 states. Word has length 432 [2018-07-23 15:25:06,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:06,055 INFO L225 Difference]: With dead ends: 437 [2018-07-23 15:25:06,055 INFO L226 Difference]: Without dead ends: 435 [2018-07-23 15:25:06,057 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23436, Invalid=23436, Unknown=0, NotChecked=0, Total=46872 [2018-07-23 15:25:06,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-07-23 15:25:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2018-07-23 15:25:06,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2018-07-23 15:25:06,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 435 transitions. [2018-07-23 15:25:06,062 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 435 transitions. Word has length 432 [2018-07-23 15:25:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:06,062 INFO L471 AbstractCegarLoop]: Abstraction has 435 states and 435 transitions. [2018-07-23 15:25:06,062 INFO L472 AbstractCegarLoop]: Interpolant automaton has 217 states. [2018-07-23 15:25:06,062 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 435 transitions. [2018-07-23 15:25:06,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2018-07-23 15:25:06,063 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:06,063 INFO L353 BasicCegarLoop]: trace histogram [216, 215, 1, 1, 1] [2018-07-23 15:25:06,063 INFO L414 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:06,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1163083139, now seen corresponding path program 215 times [2018-07-23 15:25:06,064 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:07,450 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 15:25:07,451 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:07,451 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [217] total 217 [2018-07-23 15:25:07,451 INFO L450 AbstractCegarLoop]: Interpolant automaton has 218 states [2018-07-23 15:25:07,454 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2018-07-23 15:25:07,456 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23653, Invalid=23653, Unknown=0, NotChecked=0, Total=47306 [2018-07-23 15:25:07,456 INFO L87 Difference]: Start difference. First operand 435 states and 435 transitions. Second operand 218 states. [2018-07-23 15:25:10,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:10,523 INFO L93 Difference]: Finished difference Result 439 states and 439 transitions. [2018-07-23 15:25:10,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2018-07-23 15:25:10,523 INFO L78 Accepts]: Start accepts. Automaton has 218 states. Word has length 434 [2018-07-23 15:25:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:10,524 INFO L225 Difference]: With dead ends: 439 [2018-07-23 15:25:10,524 INFO L226 Difference]: Without dead ends: 437 [2018-07-23 15:25:10,526 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23653, Invalid=23653, Unknown=0, NotChecked=0, Total=47306 [2018-07-23 15:25:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2018-07-23 15:25:10,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2018-07-23 15:25:10,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2018-07-23 15:25:10,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 437 transitions. [2018-07-23 15:25:10,530 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 437 transitions. Word has length 434 [2018-07-23 15:25:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:10,530 INFO L471 AbstractCegarLoop]: Abstraction has 437 states and 437 transitions. [2018-07-23 15:25:10,530 INFO L472 AbstractCegarLoop]: Interpolant automaton has 218 states. [2018-07-23 15:25:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 437 transitions. [2018-07-23 15:25:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2018-07-23 15:25:10,532 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:10,532 INFO L353 BasicCegarLoop]: trace histogram [217, 216, 1, 1, 1] [2018-07-23 15:25:10,532 INFO L414 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:10,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1031347529, now seen corresponding path program 216 times [2018-07-23 15:25:10,532 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:12,006 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 15:25:12,007 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:12,007 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [218] total 218 [2018-07-23 15:25:12,007 INFO L450 AbstractCegarLoop]: Interpolant automaton has 219 states [2018-07-23 15:25:12,012 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 219 interpolants. [2018-07-23 15:25:12,015 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23871, Invalid=23871, Unknown=0, NotChecked=0, Total=47742 [2018-07-23 15:25:12,016 INFO L87 Difference]: Start difference. First operand 437 states and 437 transitions. Second operand 219 states. [2018-07-23 15:25:14,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:14,705 INFO L93 Difference]: Finished difference Result 441 states and 441 transitions. [2018-07-23 15:25:14,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2018-07-23 15:25:14,705 INFO L78 Accepts]: Start accepts. Automaton has 219 states. Word has length 436 [2018-07-23 15:25:14,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:14,706 INFO L225 Difference]: With dead ends: 441 [2018-07-23 15:25:14,706 INFO L226 Difference]: Without dead ends: 439 [2018-07-23 15:25:14,707 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 15:25:14,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2018-07-23 15:25:14,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2018-07-23 15:25:14,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2018-07-23 15:25:14,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 439 transitions. [2018-07-23 15:25:14,711 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 439 transitions. Word has length 436 [2018-07-23 15:25:14,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:14,711 INFO L471 AbstractCegarLoop]: Abstraction has 439 states and 439 transitions. [2018-07-23 15:25:14,711 INFO L472 AbstractCegarLoop]: Interpolant automaton has 219 states. [2018-07-23 15:25:14,711 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 439 transitions. [2018-07-23 15:25:14,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2018-07-23 15:25:14,713 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:14,713 INFO L353 BasicCegarLoop]: trace histogram [218, 217, 1, 1, 1] [2018-07-23 15:25:14,713 INFO L414 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:14,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1012522097, now seen corresponding path program 217 times [2018-07-23 15:25:14,713 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:16,179 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 15:25:16,180 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:16,180 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [219] total 219 [2018-07-23 15:25:16,180 INFO L450 AbstractCegarLoop]: Interpolant automaton has 220 states [2018-07-23 15:25:16,184 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 220 interpolants. [2018-07-23 15:25:16,186 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24090, Invalid=24090, Unknown=0, NotChecked=0, Total=48180 [2018-07-23 15:25:16,186 INFO L87 Difference]: Start difference. First operand 439 states and 439 transitions. Second operand 220 states. [2018-07-23 15:25:17,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:17,381 INFO L93 Difference]: Finished difference Result 443 states and 443 transitions. [2018-07-23 15:25:17,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2018-07-23 15:25:17,381 INFO L78 Accepts]: Start accepts. Automaton has 220 states. Word has length 438 [2018-07-23 15:25:17,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:17,382 INFO L225 Difference]: With dead ends: 443 [2018-07-23 15:25:17,382 INFO L226 Difference]: Without dead ends: 441 [2018-07-23 15:25:17,384 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 15:25:17,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2018-07-23 15:25:17,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2018-07-23 15:25:17,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2018-07-23 15:25:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 441 transitions. [2018-07-23 15:25:17,388 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 441 transitions. Word has length 438 [2018-07-23 15:25:17,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:17,389 INFO L471 AbstractCegarLoop]: Abstraction has 441 states and 441 transitions. [2018-07-23 15:25:17,389 INFO L472 AbstractCegarLoop]: Interpolant automaton has 220 states. [2018-07-23 15:25:17,389 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 441 transitions. [2018-07-23 15:25:17,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2018-07-23 15:25:17,390 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:17,390 INFO L353 BasicCegarLoop]: trace histogram [219, 218, 1, 1, 1] [2018-07-23 15:25:17,390 INFO L414 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:17,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1923788885, now seen corresponding path program 218 times [2018-07-23 15:25:17,390 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:18,817 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 15:25:18,817 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:18,818 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [220] total 220 [2018-07-23 15:25:18,818 INFO L450 AbstractCegarLoop]: Interpolant automaton has 221 states [2018-07-23 15:25:18,821 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2018-07-23 15:25:18,822 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24310, Invalid=24310, Unknown=0, NotChecked=0, Total=48620 [2018-07-23 15:25:18,823 INFO L87 Difference]: Start difference. First operand 441 states and 441 transitions. Second operand 221 states. [2018-07-23 15:25:19,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:19,921 INFO L93 Difference]: Finished difference Result 445 states and 445 transitions. [2018-07-23 15:25:19,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2018-07-23 15:25:19,921 INFO L78 Accepts]: Start accepts. Automaton has 221 states. Word has length 440 [2018-07-23 15:25:19,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:19,922 INFO L225 Difference]: With dead ends: 445 [2018-07-23 15:25:19,922 INFO L226 Difference]: Without dead ends: 443 [2018-07-23 15:25:19,924 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=24310, Invalid=24310, Unknown=0, NotChecked=0, Total=48620 [2018-07-23 15:25:19,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2018-07-23 15:25:19,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2018-07-23 15:25:19,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2018-07-23 15:25:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 443 transitions. [2018-07-23 15:25:19,928 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 443 transitions. Word has length 440 [2018-07-23 15:25:19,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:19,929 INFO L471 AbstractCegarLoop]: Abstraction has 443 states and 443 transitions. [2018-07-23 15:25:19,929 INFO L472 AbstractCegarLoop]: Interpolant automaton has 221 states. [2018-07-23 15:25:19,929 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 443 transitions. [2018-07-23 15:25:19,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2018-07-23 15:25:19,930 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:19,930 INFO L353 BasicCegarLoop]: trace histogram [220, 219, 1, 1, 1] [2018-07-23 15:25:19,930 INFO L414 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:19,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1925129115, now seen corresponding path program 219 times [2018-07-23 15:25:19,931 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:21,421 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 15:25:21,421 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:21,421 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [221] total 221 [2018-07-23 15:25:21,422 INFO L450 AbstractCegarLoop]: Interpolant automaton has 222 states [2018-07-23 15:25:21,426 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 222 interpolants. [2018-07-23 15:25:21,428 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24531, Invalid=24531, Unknown=0, NotChecked=0, Total=49062 [2018-07-23 15:25:21,428 INFO L87 Difference]: Start difference. First operand 443 states and 443 transitions. Second operand 222 states. [2018-07-23 15:25:23,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:23,692 INFO L93 Difference]: Finished difference Result 447 states and 447 transitions. [2018-07-23 15:25:23,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2018-07-23 15:25:23,692 INFO L78 Accepts]: Start accepts. Automaton has 222 states. Word has length 442 [2018-07-23 15:25:23,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:23,692 INFO L225 Difference]: With dead ends: 447 [2018-07-23 15:25:23,692 INFO L226 Difference]: Without dead ends: 445 [2018-07-23 15:25:23,694 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24531, Invalid=24531, Unknown=0, NotChecked=0, Total=49062 [2018-07-23 15:25:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2018-07-23 15:25:23,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 445. [2018-07-23 15:25:23,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2018-07-23 15:25:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 445 transitions. [2018-07-23 15:25:23,698 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 445 transitions. Word has length 442 [2018-07-23 15:25:23,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:23,698 INFO L471 AbstractCegarLoop]: Abstraction has 445 states and 445 transitions. [2018-07-23 15:25:23,698 INFO L472 AbstractCegarLoop]: Interpolant automaton has 222 states. [2018-07-23 15:25:23,698 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 445 transitions. [2018-07-23 15:25:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2018-07-23 15:25:23,699 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:23,700 INFO L353 BasicCegarLoop]: trace histogram [221, 220, 1, 1, 1] [2018-07-23 15:25:23,700 INFO L414 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:23,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1081877151, now seen corresponding path program 220 times [2018-07-23 15:25:23,700 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:25,195 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 15:25:25,195 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:25,195 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [222] total 222 [2018-07-23 15:25:25,196 INFO L450 AbstractCegarLoop]: Interpolant automaton has 223 states [2018-07-23 15:25:25,199 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 223 interpolants. [2018-07-23 15:25:25,202 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24753, Invalid=24753, Unknown=0, NotChecked=0, Total=49506 [2018-07-23 15:25:25,202 INFO L87 Difference]: Start difference. First operand 445 states and 445 transitions. Second operand 223 states. [2018-07-23 15:25:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:28,835 INFO L93 Difference]: Finished difference Result 449 states and 449 transitions. [2018-07-23 15:25:28,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2018-07-23 15:25:28,835 INFO L78 Accepts]: Start accepts. Automaton has 223 states. Word has length 444 [2018-07-23 15:25:28,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:28,837 INFO L225 Difference]: With dead ends: 449 [2018-07-23 15:25:28,837 INFO L226 Difference]: Without dead ends: 447 [2018-07-23 15:25:28,840 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24753, Invalid=24753, Unknown=0, NotChecked=0, Total=49506 [2018-07-23 15:25:28,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-07-23 15:25:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-07-23 15:25:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-07-23 15:25:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 447 transitions. [2018-07-23 15:25:28,844 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 447 transitions. Word has length 444 [2018-07-23 15:25:28,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:28,845 INFO L471 AbstractCegarLoop]: Abstraction has 447 states and 447 transitions. [2018-07-23 15:25:28,845 INFO L472 AbstractCegarLoop]: Interpolant automaton has 223 states. [2018-07-23 15:25:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 447 transitions. [2018-07-23 15:25:28,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2018-07-23 15:25:28,846 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:28,846 INFO L353 BasicCegarLoop]: trace histogram [222, 221, 1, 1, 1] [2018-07-23 15:25:28,847 INFO L414 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:28,847 INFO L82 PathProgramCache]: Analyzing trace with hash 301908569, now seen corresponding path program 221 times [2018-07-23 15:25:28,847 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:30,386 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 15:25:30,387 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:30,387 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [223] total 223 [2018-07-23 15:25:30,387 INFO L450 AbstractCegarLoop]: Interpolant automaton has 224 states [2018-07-23 15:25:30,391 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2018-07-23 15:25:30,393 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24976, Invalid=24976, Unknown=0, NotChecked=0, Total=49952 [2018-07-23 15:25:30,394 INFO L87 Difference]: Start difference. First operand 447 states and 447 transitions. Second operand 224 states. [2018-07-23 15:25:33,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:33,758 INFO L93 Difference]: Finished difference Result 451 states and 451 transitions. [2018-07-23 15:25:33,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2018-07-23 15:25:33,758 INFO L78 Accepts]: Start accepts. Automaton has 224 states. Word has length 446 [2018-07-23 15:25:33,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:33,759 INFO L225 Difference]: With dead ends: 451 [2018-07-23 15:25:33,759 INFO L226 Difference]: Without dead ends: 449 [2018-07-23 15:25:33,762 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24976, Invalid=24976, Unknown=0, NotChecked=0, Total=49952 [2018-07-23 15:25:33,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2018-07-23 15:25:33,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 449. [2018-07-23 15:25:33,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2018-07-23 15:25:33,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 449 transitions. [2018-07-23 15:25:33,766 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 449 transitions. Word has length 446 [2018-07-23 15:25:33,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:33,766 INFO L471 AbstractCegarLoop]: Abstraction has 449 states and 449 transitions. [2018-07-23 15:25:33,766 INFO L472 AbstractCegarLoop]: Interpolant automaton has 224 states. [2018-07-23 15:25:33,767 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 449 transitions. [2018-07-23 15:25:33,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2018-07-23 15:25:33,768 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:33,768 INFO L353 BasicCegarLoop]: trace histogram [223, 222, 1, 1, 1] [2018-07-23 15:25:33,768 INFO L414 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:33,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1923589229, now seen corresponding path program 222 times [2018-07-23 15:25:33,768 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:35,280 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 15:25:35,280 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:35,280 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [224] total 224 [2018-07-23 15:25:35,280 INFO L450 AbstractCegarLoop]: Interpolant automaton has 225 states [2018-07-23 15:25:35,283 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 225 interpolants. [2018-07-23 15:25:35,284 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25200, Invalid=25200, Unknown=0, NotChecked=0, Total=50400 [2018-07-23 15:25:35,285 INFO L87 Difference]: Start difference. First operand 449 states and 449 transitions. Second operand 225 states. [2018-07-23 15:25:38,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:38,086 INFO L93 Difference]: Finished difference Result 453 states and 453 transitions. [2018-07-23 15:25:38,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2018-07-23 15:25:38,086 INFO L78 Accepts]: Start accepts. Automaton has 225 states. Word has length 448 [2018-07-23 15:25:38,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:38,087 INFO L225 Difference]: With dead ends: 453 [2018-07-23 15:25:38,087 INFO L226 Difference]: Without dead ends: 451 [2018-07-23 15:25:38,089 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=25200, Invalid=25200, Unknown=0, NotChecked=0, Total=50400 [2018-07-23 15:25:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2018-07-23 15:25:38,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2018-07-23 15:25:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-07-23 15:25:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 451 transitions. [2018-07-23 15:25:38,094 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 451 transitions. Word has length 448 [2018-07-23 15:25:38,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:38,094 INFO L471 AbstractCegarLoop]: Abstraction has 451 states and 451 transitions. [2018-07-23 15:25:38,094 INFO L472 AbstractCegarLoop]: Interpolant automaton has 225 states. [2018-07-23 15:25:38,094 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 451 transitions. [2018-07-23 15:25:38,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2018-07-23 15:25:38,096 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:38,096 INFO L353 BasicCegarLoop]: trace histogram [224, 223, 1, 1, 1] [2018-07-23 15:25:38,096 INFO L414 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:38,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1733259699, now seen corresponding path program 223 times [2018-07-23 15:25:38,096 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:39,746 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 15:25:39,747 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:39,747 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [225] total 225 [2018-07-23 15:25:39,747 INFO L450 AbstractCegarLoop]: Interpolant automaton has 226 states [2018-07-23 15:25:39,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 226 interpolants. [2018-07-23 15:25:39,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25425, Invalid=25425, Unknown=0, NotChecked=0, Total=50850 [2018-07-23 15:25:39,751 INFO L87 Difference]: Start difference. First operand 451 states and 451 transitions. Second operand 226 states. [2018-07-23 15:25:42,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:42,271 INFO L93 Difference]: Finished difference Result 455 states and 455 transitions. [2018-07-23 15:25:42,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2018-07-23 15:25:42,271 INFO L78 Accepts]: Start accepts. Automaton has 226 states. Word has length 450 [2018-07-23 15:25:42,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:42,272 INFO L225 Difference]: With dead ends: 455 [2018-07-23 15:25:42,272 INFO L226 Difference]: Without dead ends: 453 [2018-07-23 15:25:42,273 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 15:25:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2018-07-23 15:25:42,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 453. [2018-07-23 15:25:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2018-07-23 15:25:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 453 transitions. [2018-07-23 15:25:42,277 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 453 transitions. Word has length 450 [2018-07-23 15:25:42,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:42,278 INFO L471 AbstractCegarLoop]: Abstraction has 453 states and 453 transitions. [2018-07-23 15:25:42,278 INFO L472 AbstractCegarLoop]: Interpolant automaton has 226 states. [2018-07-23 15:25:42,278 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 453 transitions. [2018-07-23 15:25:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2018-07-23 15:25:42,279 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:42,279 INFO L353 BasicCegarLoop]: trace histogram [225, 224, 1, 1, 1] [2018-07-23 15:25:42,280 INFO L414 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:42,280 INFO L82 PathProgramCache]: Analyzing trace with hash 784792199, now seen corresponding path program 224 times [2018-07-23 15:25:42,280 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:43,839 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 15:25:43,839 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:43,839 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [226] total 226 [2018-07-23 15:25:43,839 INFO L450 AbstractCegarLoop]: Interpolant automaton has 227 states [2018-07-23 15:25:43,843 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 227 interpolants. [2018-07-23 15:25:43,846 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25651, Invalid=25651, Unknown=0, NotChecked=0, Total=51302 [2018-07-23 15:25:43,846 INFO L87 Difference]: Start difference. First operand 453 states and 453 transitions. Second operand 227 states. [2018-07-23 15:25:46,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:46,305 INFO L93 Difference]: Finished difference Result 457 states and 457 transitions. [2018-07-23 15:25:46,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2018-07-23 15:25:46,306 INFO L78 Accepts]: Start accepts. Automaton has 227 states. Word has length 452 [2018-07-23 15:25:46,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:46,306 INFO L225 Difference]: With dead ends: 457 [2018-07-23 15:25:46,306 INFO L226 Difference]: Without dead ends: 455 [2018-07-23 15:25:46,308 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=25651, Invalid=25651, Unknown=0, NotChecked=0, Total=51302 [2018-07-23 15:25:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2018-07-23 15:25:46,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 455. [2018-07-23 15:25:46,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2018-07-23 15:25:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 455 transitions. [2018-07-23 15:25:46,312 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 455 transitions. Word has length 452 [2018-07-23 15:25:46,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:46,312 INFO L471 AbstractCegarLoop]: Abstraction has 455 states and 455 transitions. [2018-07-23 15:25:46,312 INFO L472 AbstractCegarLoop]: Interpolant automaton has 227 states. [2018-07-23 15:25:46,312 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 455 transitions. [2018-07-23 15:25:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2018-07-23 15:25:46,314 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:46,314 INFO L353 BasicCegarLoop]: trace histogram [226, 225, 1, 1, 1] [2018-07-23 15:25:46,314 INFO L414 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:46,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1728888767, now seen corresponding path program 225 times [2018-07-23 15:25:46,315 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-07-23 15:25:46,834 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 15:25:46,842 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 15:25:46,842 INFO L202 PluginConnector]: Adding new model count_by_1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 03:25:46 BoogieIcfgContainer [2018-07-23 15:25:46,842 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 15:25:46,845 INFO L168 Benchmark]: Toolchain (without parser) took 260698.86 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.3 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -598.3 MB). Peak memory consumption was 731.3 MB. Max. memory is 7.1 GB. [2018-07-23 15:25:46,847 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:25:46,847 INFO L168 Benchmark]: Boogie Preprocessor took 50.79 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:25:46,847 INFO L168 Benchmark]: RCFGBuilder took 262.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-23 15:25:46,848 INFO L168 Benchmark]: TraceAbstraction took 260379.04 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.3 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -608.9 MB). Peak memory consumption was 720.7 MB. Max. memory is 7.1 GB. [2018-07-23 15:25:46,850 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 50.79 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 262.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 260379.04 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.3 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -608.9 MB). Peak memory consumption was 720.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 34]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 34). Cancelled while BasicCegarLoop was analyzing trace of length 455 with TraceHistMax 226, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 61 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 260.2s OverallTime, 226 OverallIterations, 226 TraceHistogramMax, 133.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 900 SDtfs, 0 SDslu, 36851 SDs, 0 SdLazy, 37076 SolverSat, 473 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25650 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 25425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=455occurred in iteration=225, 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, 225 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 16.7s SatisfiabilityAnalysisTime, 97.6s InterpolantComputationTime, 51300 NumberOfCodeBlocks, 51300 NumberOfCodeBlocksAsserted, 225 NumberOfCheckSat, 51075 ConstructedInterpolants, 0 QuantifiedInterpolants, 46070325 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 225 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3796800 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_1.i_3.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_15-25-46-865.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_1.i_3.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_15-25-46-865.csv Completed graceful shutdown