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/invert_string.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 15:24:49,814 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 15:24:49,819 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 15:24:49,839 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 15:24:49,840 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 15:24:49,841 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 15:24:49,842 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 15:24:49,845 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 15:24:49,847 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 15:24:49,849 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 15:24:49,851 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 15:24:49,851 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 15:24:49,854 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 15:24:49,855 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 15:24:49,856 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 15:24:49,860 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 15:24:49,862 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 15:24:49,872 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 15:24:49,874 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 15:24:49,881 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 15:24:49,883 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 15:24:49,884 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 15:24:49,886 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-23 15:24:49,889 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 15:24:49,889 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 15:24:49,890 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 15:24:49,891 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 15:24:49,892 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 15:24:49,893 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 15:24:49,896 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 15:24:49,897 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 15:24:49,897 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-23 15:24:49,898 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-23 15:24:49,898 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-23 15:24:49,900 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-23 15:24:49,901 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-23 15:24:49,901 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 15:24:49,926 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 15:24:49,926 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 15:24:49,931 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 15:24:49,931 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 15:24:49,931 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 15:24:49,931 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 15:24:49,932 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 15:24:49,932 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 15:24:49,996 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 15:24:50,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 15:24:50,021 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 15:24:50,023 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 15:24:50,023 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 15:24:50,024 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/invert_string.i_4.bpl [2018-07-23 15:24:50,025 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/invert_string.i_4.bpl' [2018-07-23 15:24:50,103 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 15:24:50,107 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 15:24:50,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 15:24:50,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 15:24:50,108 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 15:24:50,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:24:50" (1/1) ... [2018-07-23 15:24:50,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:24:50" (1/1) ... [2018-07-23 15:24:50,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:24:50" (1/1) ... [2018-07-23 15:24:50,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:24:50" (1/1) ... [2018-07-23 15:24:50,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:24:50" (1/1) ... [2018-07-23 15:24:50,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:24:50" (1/1) ... [2018-07-23 15:24:50,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:24:50" (1/1) ... [2018-07-23 15:24:50,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 15:24:50,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 15:24:50,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 15:24:50,172 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 15:24:50,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:24:50" (1/1) ... [2018-07-23 15:24:50,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 15:24:50,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 15:24:50,416 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 15:24:50,417 INFO L202 PluginConnector]: Adding new model invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:24:50 BoogieIcfgContainer [2018-07-23 15:24:50,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 15:24:50,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 15:24:50,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 15:24:50,422 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 15:24:50,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:24:50" (1/2) ... [2018-07-23 15:24:50,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c1c7f8 and model type invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 03:24:50, skipping insertion in model container [2018-07-23 15:24:50,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:24:50" (2/2) ... [2018-07-23 15:24:50,426 INFO L112 eAbstractionObserver]: Analyzing ICFG invert_string.i_4.bpl [2018-07-23 15:24:50,436 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 15:24:50,444 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 15:24:50,493 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 15:24:50,494 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 15:24:50,494 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 15:24:50,494 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 15:24:50,495 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 15:24:50,495 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 15:24:50,495 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 15:24:50,495 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 15:24:50,496 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 15:24:50,510 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2018-07-23 15:24:50,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 15:24:50,519 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:50,520 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-07-23 15:24:50,521 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:50,525 INFO L82 PathProgramCache]: Analyzing trace with hash 889539531, now seen corresponding path program 1 times [2018-07-23 15:24:50,531 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:50,628 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 15:24:50,630 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:24:50,631 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 15:24:50,635 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:24:50,647 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:24:50,647 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:24:50,650 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 4 states. [2018-07-23 15:24:50,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:50,725 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2018-07-23 15:24:50,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:24:50,727 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-07-23 15:24:50,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:50,738 INFO L225 Difference]: With dead ends: 14 [2018-07-23 15:24:50,739 INFO L226 Difference]: Without dead ends: 9 [2018-07-23 15:24:50,742 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:24:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-23 15:24:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-23 15:24:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 15:24:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-07-23 15:24:50,783 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-07-23 15:24:50,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:50,784 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-07-23 15:24:50,784 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:24:50,784 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-07-23 15:24:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-23 15:24:50,785 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:50,785 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-07-23 15:24:50,785 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:50,786 INFO L82 PathProgramCache]: Analyzing trace with hash 198621957, now seen corresponding path program 1 times [2018-07-23 15:24:50,786 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:50,844 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 15:24:50,844 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:50,844 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:24:50,846 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 15:24:50,847 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 15:24:50,847 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:24:50,847 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-07-23 15:24:50,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:50,908 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-07-23 15:24:50,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:24:50,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-07-23 15:24:50,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:50,911 INFO L225 Difference]: With dead ends: 13 [2018-07-23 15:24:50,912 INFO L226 Difference]: Without dead ends: 11 [2018-07-23 15:24:50,916 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:24:50,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-07-23 15:24:50,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-07-23 15:24:50,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-23 15:24:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-07-23 15:24:50,923 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-07-23 15:24:50,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:50,924 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-07-23 15:24:50,924 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 15:24:50,924 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-07-23 15:24:50,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 15:24:50,925 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:50,925 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-07-23 15:24:50,925 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:50,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191999, now seen corresponding path program 1 times [2018-07-23 15:24:50,926 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:51,061 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:51,062 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:24:51,062 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:24:51,062 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:24:51,063 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:24:51,063 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-07-23 15:24:51,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:51,280 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2018-07-23 15:24:51,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 15:24:51,281 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-07-23 15:24:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:51,281 INFO L225 Difference]: With dead ends: 19 [2018-07-23 15:24:51,281 INFO L226 Difference]: Without dead ends: 13 [2018-07-23 15:24:51,282 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:24:51,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-23 15:24:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-07-23 15:24:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-07-23 15:24:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-07-23 15:24:51,289 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-07-23 15:24:51,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:51,290 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-07-23 15:24:51,290 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:24:51,290 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-07-23 15:24:51,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-07-23 15:24:51,291 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:51,291 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-07-23 15:24:51,291 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:51,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1765270407, now seen corresponding path program 2 times [2018-07-23 15:24:51,292 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:51,328 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:51,329 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:24:51,329 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:24:51,329 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:24:51,330 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:24:51,330 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-07-23 15:24:51,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:51,365 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-07-23 15:24:51,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 15:24:51,366 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-07-23 15:24:51,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:51,367 INFO L225 Difference]: With dead ends: 17 [2018-07-23 15:24:51,367 INFO L226 Difference]: Without dead ends: 15 [2018-07-23 15:24:51,368 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:24:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-23 15:24:51,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-07-23 15:24:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-07-23 15:24:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-07-23 15:24:51,378 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-07-23 15:24:51,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:51,379 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-07-23 15:24:51,379 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:24:51,379 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-07-23 15:24:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-23 15:24:51,380 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:51,380 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-07-23 15:24:51,381 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:51,381 INFO L82 PathProgramCache]: Analyzing trace with hash 87273139, now seen corresponding path program 3 times [2018-07-23 15:24:51,381 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:51,493 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 15:24:51,496 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:51,497 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-23 15:24:51,497 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 15:24:51,498 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 15:24:51,498 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:24:51,498 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-07-23 15:24:51,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:51,640 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-07-23 15:24:51,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 15:24:51,641 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-07-23 15:24:51,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:51,642 INFO L225 Difference]: With dead ends: 25 [2018-07-23 15:24:51,642 INFO L226 Difference]: Without dead ends: 17 [2018-07-23 15:24:51,643 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:24:51,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-07-23 15:24:51,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-07-23 15:24:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-23 15:24:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-07-23 15:24:51,651 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-07-23 15:24:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:51,651 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-07-23 15:24:51,652 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 15:24:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-07-23 15:24:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-23 15:24:51,652 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:51,653 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-07-23 15:24:51,653 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:51,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1096334355, now seen corresponding path program 4 times [2018-07-23 15:24:51,653 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:51,696 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:51,696 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-23 15:24:51,700 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 15:24:51,701 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 15:24:51,703 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:24:51,703 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2018-07-23 15:24:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:51,748 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-07-23 15:24:51,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 15:24:51,748 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-07-23 15:24:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:51,749 INFO L225 Difference]: With dead ends: 21 [2018-07-23 15:24:51,749 INFO L226 Difference]: Without dead ends: 19 [2018-07-23 15:24:51,750 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:24:51,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-07-23 15:24:51,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-07-23 15:24:51,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-07-23 15:24:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-07-23 15:24:51,760 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-07-23 15:24:51,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:51,760 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-07-23 15:24:51,760 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 15:24:51,760 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-07-23 15:24:51,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-07-23 15:24:51,761 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:51,762 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-07-23 15:24:51,762 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:51,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1310275289, now seen corresponding path program 5 times [2018-07-23 15:24:51,762 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:51,842 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:51,843 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 15:24:51,843 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 15:24:51,843 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 15:24:51,844 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:24:51,844 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-07-23 15:24:51,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:51,982 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-07-23 15:24:51,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 15:24:51,983 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-07-23 15:24:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:51,984 INFO L225 Difference]: With dead ends: 31 [2018-07-23 15:24:51,984 INFO L226 Difference]: Without dead ends: 21 [2018-07-23 15:24:51,985 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:24:51,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-23 15:24:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-07-23 15:24:51,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-07-23 15:24:52,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-07-23 15:24:52,000 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-07-23 15:24:52,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:52,003 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-07-23 15:24:52,003 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 15:24:52,003 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-07-23 15:24:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-23 15:24:52,005 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:52,005 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-07-23 15:24:52,005 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:52,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1330040479, now seen corresponding path program 6 times [2018-07-23 15:24:52,006 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:52,057 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:52,058 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-23 15:24:52,059 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 15:24:52,060 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 15:24:52,060 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:24:52,061 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2018-07-23 15:24:52,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:52,121 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-07-23 15:24:52,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 15:24:52,122 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-07-23 15:24:52,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:52,123 INFO L225 Difference]: With dead ends: 25 [2018-07-23 15:24:52,123 INFO L226 Difference]: Without dead ends: 23 [2018-07-23 15:24:52,124 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:24:52,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-07-23 15:24:52,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-07-23 15:24:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-23 15:24:52,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-07-23 15:24:52,138 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-07-23 15:24:52,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:52,139 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-07-23 15:24:52,139 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 15:24:52,140 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-07-23 15:24:52,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 15:24:52,141 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:52,142 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-07-23 15:24:52,142 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:52,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1731406235, now seen corresponding path program 7 times [2018-07-23 15:24:52,142 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:52,249 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:52,250 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-23 15:24:52,250 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 15:24:52,250 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 15:24:52,251 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:24:52,251 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-07-23 15:24:52,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:52,447 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2018-07-23 15:24:52,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 15:24:52,448 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-07-23 15:24:52,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:52,448 INFO L225 Difference]: With dead ends: 37 [2018-07-23 15:24:52,449 INFO L226 Difference]: Without dead ends: 25 [2018-07-23 15:24:52,450 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:24:52,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-07-23 15:24:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-07-23 15:24:52,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-23 15:24:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-07-23 15:24:52,464 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-07-23 15:24:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:52,465 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-07-23 15:24:52,465 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 15:24:52,465 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-07-23 15:24:52,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-07-23 15:24:52,466 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:52,467 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-07-23 15:24:52,467 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:52,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1774380245, now seen corresponding path program 8 times [2018-07-23 15:24:52,468 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:52,509 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:52,509 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-23 15:24:52,509 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 15:24:52,510 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 15:24:52,510 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:24:52,514 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2018-07-23 15:24:52,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:52,561 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-07-23 15:24:52,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 15:24:52,563 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-07-23 15:24:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:52,564 INFO L225 Difference]: With dead ends: 29 [2018-07-23 15:24:52,567 INFO L226 Difference]: Without dead ends: 27 [2018-07-23 15:24:52,568 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:24:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-23 15:24:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-07-23 15:24:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-07-23 15:24:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-07-23 15:24:52,580 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-07-23 15:24:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:52,581 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-07-23 15:24:52,581 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 15:24:52,581 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-07-23 15:24:52,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-23 15:24:52,582 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:52,583 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-07-23 15:24:52,583 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:52,584 INFO L82 PathProgramCache]: Analyzing trace with hash 77451279, now seen corresponding path program 9 times [2018-07-23 15:24:52,584 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:52,680 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:52,680 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-23 15:24:52,681 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 15:24:52,681 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 15:24:52,681 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:24:52,682 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-07-23 15:24:52,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:52,871 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-07-23 15:24:52,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 15:24:52,871 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-07-23 15:24:52,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:52,872 INFO L225 Difference]: With dead ends: 43 [2018-07-23 15:24:52,872 INFO L226 Difference]: Without dead ends: 29 [2018-07-23 15:24:52,873 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:24:52,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-07-23 15:24:52,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-07-23 15:24:52,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-23 15:24:52,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-07-23 15:24:52,886 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-07-23 15:24:52,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:52,886 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-07-23 15:24:52,886 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 15:24:52,886 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-07-23 15:24:52,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-23 15:24:52,887 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:52,888 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-07-23 15:24:52,888 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:52,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1980325449, now seen corresponding path program 10 times [2018-07-23 15:24:52,888 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:52,923 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:52,923 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 15:24:52,924 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 15:24:52,924 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 15:24:52,924 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:24:52,925 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 10 states. [2018-07-23 15:24:52,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:52,971 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-07-23 15:24:52,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 15:24:52,972 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-07-23 15:24:52,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:52,973 INFO L225 Difference]: With dead ends: 33 [2018-07-23 15:24:52,973 INFO L226 Difference]: Without dead ends: 31 [2018-07-23 15:24:52,974 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:24:52,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-07-23 15:24:52,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-07-23 15:24:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-07-23 15:24:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-07-23 15:24:52,991 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-07-23 15:24:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:52,992 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-07-23 15:24:52,992 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 15:24:52,992 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-07-23 15:24:52,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-23 15:24:52,993 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:52,993 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-07-23 15:24:52,993 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:52,994 INFO L82 PathProgramCache]: Analyzing trace with hash 422296707, now seen corresponding path program 11 times [2018-07-23 15:24:52,994 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:53,090 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:53,090 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-23 15:24:53,091 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 15:24:53,091 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 15:24:53,092 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:24:53,092 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-07-23 15:24:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:53,318 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2018-07-23 15:24:53,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 15:24:53,319 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-07-23 15:24:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:53,320 INFO L225 Difference]: With dead ends: 49 [2018-07-23 15:24:53,320 INFO L226 Difference]: Without dead ends: 33 [2018-07-23 15:24:53,321 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:24:53,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-23 15:24:53,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-07-23 15:24:53,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-07-23 15:24:53,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-07-23 15:24:53,339 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-07-23 15:24:53,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:53,340 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-07-23 15:24:53,340 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 15:24:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-07-23 15:24:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-23 15:24:53,343 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:53,343 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-07-23 15:24:53,343 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:53,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1320051267, now seen corresponding path program 12 times [2018-07-23 15:24:53,344 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:53,394 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:53,394 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-23 15:24:53,394 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 15:24:53,395 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 15:24:53,395 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:24:53,397 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-07-23 15:24:53,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:53,464 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-07-23 15:24:53,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 15:24:53,465 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-07-23 15:24:53,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:53,466 INFO L225 Difference]: With dead ends: 37 [2018-07-23 15:24:53,466 INFO L226 Difference]: Without dead ends: 35 [2018-07-23 15:24:53,471 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:24:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-07-23 15:24:53,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-07-23 15:24:53,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-23 15:24:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-07-23 15:24:53,493 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-07-23 15:24:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:53,494 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-07-23 15:24:53,494 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 15:24:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-07-23 15:24:53,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-23 15:24:53,498 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:53,498 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-07-23 15:24:53,498 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:53,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1553862921, now seen corresponding path program 13 times [2018-07-23 15:24:53,499 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:53,620 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:53,620 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-07-23 15:24:53,620 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 15:24:53,621 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 15:24:53,621 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:24:53,621 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-07-23 15:24:53,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:53,877 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2018-07-23 15:24:53,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 15:24:53,877 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-07-23 15:24:53,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:53,878 INFO L225 Difference]: With dead ends: 55 [2018-07-23 15:24:53,879 INFO L226 Difference]: Without dead ends: 37 [2018-07-23 15:24:53,880 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:24:53,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-07-23 15:24:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-07-23 15:24:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-07-23 15:24:53,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-07-23 15:24:53,900 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-07-23 15:24:53,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:53,902 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-07-23 15:24:53,902 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 15:24:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-07-23 15:24:53,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-07-23 15:24:53,903 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:53,903 INFO L353 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-07-23 15:24:53,903 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:53,903 INFO L82 PathProgramCache]: Analyzing trace with hash 115385137, now seen corresponding path program 14 times [2018-07-23 15:24:53,904 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 56 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:53,955 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:53,955 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-23 15:24:53,955 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 15:24:53,956 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 15:24:53,956 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:24:53,956 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 12 states. [2018-07-23 15:24:54,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:54,025 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-07-23 15:24:54,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 15:24:54,025 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2018-07-23 15:24:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:54,026 INFO L225 Difference]: With dead ends: 41 [2018-07-23 15:24:54,026 INFO L226 Difference]: Without dead ends: 39 [2018-07-23 15:24:54,027 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:24:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-23 15:24:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-07-23 15:24:54,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-07-23 15:24:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-07-23 15:24:54,049 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-07-23 15:24:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:54,049 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-07-23 15:24:54,049 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 15:24:54,050 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-07-23 15:24:54,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-23 15:24:54,050 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:54,051 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-07-23 15:24:54,051 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:54,051 INFO L82 PathProgramCache]: Analyzing trace with hash -783980693, now seen corresponding path program 15 times [2018-07-23 15:24:54,051 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:54,179 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:54,179 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-07-23 15:24:54,180 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 15:24:54,180 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 15:24:54,181 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:24:54,181 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-07-23 15:24:54,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:54,490 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-07-23 15:24:54,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 15:24:54,490 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-07-23 15:24:54,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:54,491 INFO L225 Difference]: With dead ends: 61 [2018-07-23 15:24:54,491 INFO L226 Difference]: Without dead ends: 41 [2018-07-23 15:24:54,493 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:24:54,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-07-23 15:24:54,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-07-23 15:24:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-07-23 15:24:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-07-23 15:24:54,520 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-07-23 15:24:54,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:54,520 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-07-23 15:24:54,521 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 15:24:54,521 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-07-23 15:24:54,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-23 15:24:54,522 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:54,523 INFO L353 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-07-23 15:24:54,523 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:54,523 INFO L82 PathProgramCache]: Analyzing trace with hash 830172837, now seen corresponding path program 16 times [2018-07-23 15:24:54,527 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 72 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:54,593 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:54,593 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-07-23 15:24:54,594 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 15:24:54,594 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 15:24:54,594 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:24:54,595 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 13 states. [2018-07-23 15:24:54,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:54,679 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-07-23 15:24:54,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 15:24:54,679 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2018-07-23 15:24:54,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:54,680 INFO L225 Difference]: With dead ends: 45 [2018-07-23 15:24:54,680 INFO L226 Difference]: Without dead ends: 43 [2018-07-23 15:24:54,686 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:24:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-07-23 15:24:54,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-07-23 15:24:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-07-23 15:24:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-07-23 15:24:54,715 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-07-23 15:24:54,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:54,716 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-07-23 15:24:54,716 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 15:24:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-07-23 15:24:54,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-07-23 15:24:54,717 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:54,717 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-07-23 15:24:54,717 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:54,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1067768353, now seen corresponding path program 17 times [2018-07-23 15:24:54,718 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:54,894 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:54,894 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-07-23 15:24:54,895 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 15:24:54,895 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 15:24:54,896 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:24:54,896 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-07-23 15:24:55,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:55,234 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-07-23 15:24:55,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 15:24:55,234 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-07-23 15:24:55,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:55,235 INFO L225 Difference]: With dead ends: 67 [2018-07-23 15:24:55,235 INFO L226 Difference]: Without dead ends: 45 [2018-07-23 15:24:55,236 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:24:55,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-07-23 15:24:55,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-07-23 15:24:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-07-23 15:24:55,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-07-23 15:24:55,268 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-07-23 15:24:55,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:55,269 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-07-23 15:24:55,269 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 15:24:55,269 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-07-23 15:24:55,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-23 15:24:55,272 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:55,273 INFO L353 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-07-23 15:24:55,273 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:55,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2070347801, now seen corresponding path program 18 times [2018-07-23 15:24:55,275 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 90 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:55,328 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:55,328 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-23 15:24:55,328 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 15:24:55,329 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 15:24:55,329 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:24:55,329 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 14 states. [2018-07-23 15:24:55,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:55,419 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-07-23 15:24:55,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 15:24:55,419 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2018-07-23 15:24:55,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:55,420 INFO L225 Difference]: With dead ends: 49 [2018-07-23 15:24:55,420 INFO L226 Difference]: Without dead ends: 47 [2018-07-23 15:24:55,421 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:24:55,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-07-23 15:24:55,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-07-23 15:24:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-23 15:24:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-07-23 15:24:55,459 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-07-23 15:24:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:55,459 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-07-23 15:24:55,459 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 15:24:55,459 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-07-23 15:24:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-23 15:24:55,460 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:55,460 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-07-23 15:24:55,460 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:55,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1034431059, now seen corresponding path program 19 times [2018-07-23 15:24:55,461 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:55,602 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:55,602 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-07-23 15:24:55,602 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 15:24:55,603 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 15:24:55,603 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:24:55,603 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-07-23 15:24:55,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:55,957 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2018-07-23 15:24:55,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 15:24:55,957 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-07-23 15:24:55,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:55,958 INFO L225 Difference]: With dead ends: 73 [2018-07-23 15:24:55,958 INFO L226 Difference]: Without dead ends: 49 [2018-07-23 15:24:55,959 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:24:55,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-07-23 15:24:55,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-07-23 15:24:55,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-07-23 15:24:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-07-23 15:24:55,987 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-07-23 15:24:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:55,987 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-07-23 15:24:55,987 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 15:24:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-07-23 15:24:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-07-23 15:24:55,988 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:55,988 INFO L353 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-07-23 15:24:55,988 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:55,988 INFO L82 PathProgramCache]: Analyzing trace with hash 2120767373, now seen corresponding path program 20 times [2018-07-23 15:24:55,988 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 110 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:56,040 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:56,040 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-07-23 15:24:56,040 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 15:24:56,040 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 15:24:56,041 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:24:56,041 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 15 states. [2018-07-23 15:24:56,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:56,121 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-07-23 15:24:56,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 15:24:56,122 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2018-07-23 15:24:56,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:56,123 INFO L225 Difference]: With dead ends: 53 [2018-07-23 15:24:56,123 INFO L226 Difference]: Without dead ends: 51 [2018-07-23 15:24:56,124 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:24:56,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-07-23 15:24:56,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-07-23 15:24:56,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-07-23 15:24:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-07-23 15:24:56,159 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-07-23 15:24:56,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:56,159 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-07-23 15:24:56,159 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 15:24:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-07-23 15:24:56,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-23 15:24:56,160 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:56,160 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-07-23 15:24:56,160 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:56,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2051967801, now seen corresponding path program 21 times [2018-07-23 15:24:56,161 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:56,304 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:56,304 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-07-23 15:24:56,305 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 15:24:56,305 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 15:24:56,305 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:24:56,306 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-07-23 15:24:56,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:56,692 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-07-23 15:24:56,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 15:24:56,693 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-07-23 15:24:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:56,693 INFO L225 Difference]: With dead ends: 79 [2018-07-23 15:24:56,694 INFO L226 Difference]: Without dead ends: 53 [2018-07-23 15:24:56,695 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=1430, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:24:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-07-23 15:24:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-07-23 15:24:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 15:24:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-07-23 15:24:56,728 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-07-23 15:24:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:56,728 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-07-23 15:24:56,729 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 15:24:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-07-23 15:24:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-23 15:24:56,729 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:56,729 INFO L353 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-07-23 15:24:56,730 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:56,730 INFO L82 PathProgramCache]: Analyzing trace with hash -473664255, now seen corresponding path program 22 times [2018-07-23 15:24:56,730 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 132 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:56,785 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:56,785 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-23 15:24:56,786 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 15:24:56,786 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 15:24:56,786 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:24:56,787 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 16 states. [2018-07-23 15:24:56,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:56,874 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-07-23 15:24:56,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 15:24:56,875 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2018-07-23 15:24:56,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:56,875 INFO L225 Difference]: With dead ends: 57 [2018-07-23 15:24:56,875 INFO L226 Difference]: Without dead ends: 55 [2018-07-23 15:24:56,876 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:24:56,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-07-23 15:24:56,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-07-23 15:24:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-07-23 15:24:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-07-23 15:24:56,912 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-07-23 15:24:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:56,912 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-07-23 15:24:56,912 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 15:24:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-07-23 15:24:56,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-07-23 15:24:56,913 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:56,913 INFO L353 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-07-23 15:24:56,913 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:56,914 INFO L82 PathProgramCache]: Analyzing trace with hash 75236667, now seen corresponding path program 23 times [2018-07-23 15:24:56,914 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:57,085 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:57,085 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-07-23 15:24:57,085 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 15:24:57,086 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 15:24:57,086 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:24:57,086 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-07-23 15:24:57,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:57,577 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2018-07-23 15:24:57,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 15:24:57,577 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-07-23 15:24:57,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:57,578 INFO L225 Difference]: With dead ends: 85 [2018-07-23 15:24:57,578 INFO L226 Difference]: Without dead ends: 57 [2018-07-23 15:24:57,580 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=1666, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:24:57,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-23 15:24:57,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-07-23 15:24:57,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-07-23 15:24:57,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-07-23 15:24:57,622 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-07-23 15:24:57,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:57,622 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-07-23 15:24:57,623 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 15:24:57,623 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-07-23 15:24:57,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 15:24:57,623 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:57,623 INFO L353 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-07-23 15:24:57,624 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:57,624 INFO L82 PathProgramCache]: Analyzing trace with hash 608196725, now seen corresponding path program 24 times [2018-07-23 15:24:57,624 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 156 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:57,697 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:57,697 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-07-23 15:24:57,697 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 15:24:57,698 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 15:24:57,698 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:24:57,699 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 17 states. [2018-07-23 15:24:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:57,807 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-07-23 15:24:57,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 15:24:57,807 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 56 [2018-07-23 15:24:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:57,808 INFO L225 Difference]: With dead ends: 61 [2018-07-23 15:24:57,808 INFO L226 Difference]: Without dead ends: 59 [2018-07-23 15:24:57,809 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:24:57,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-07-23 15:24:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-07-23 15:24:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-07-23 15:24:57,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-07-23 15:24:57,849 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-07-23 15:24:57,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:57,850 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-07-23 15:24:57,850 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 15:24:57,850 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-07-23 15:24:57,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-23 15:24:57,851 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:57,851 INFO L353 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-07-23 15:24:57,854 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:57,855 INFO L82 PathProgramCache]: Analyzing trace with hash 361552815, now seen corresponding path program 25 times [2018-07-23 15:24:57,855 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:58,091 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:58,091 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-07-23 15:24:58,092 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 15:24:58,092 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 15:24:58,093 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:24:58,094 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-07-23 15:24:58,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:58,661 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-07-23 15:24:58,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 15:24:58,662 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-07-23 15:24:58,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:58,663 INFO L225 Difference]: With dead ends: 91 [2018-07-23 15:24:58,663 INFO L226 Difference]: Without dead ends: 61 [2018-07-23 15:24:58,666 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=1920, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:24:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-07-23 15:24:58,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-07-23 15:24:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-07-23 15:24:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-07-23 15:24:58,704 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-07-23 15:24:58,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:58,704 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-07-23 15:24:58,704 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 15:24:58,705 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-07-23 15:24:58,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-07-23 15:24:58,705 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:58,705 INFO L353 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-07-23 15:24:58,705 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:58,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1210122729, now seen corresponding path program 26 times [2018-07-23 15:24:58,706 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 182 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:58,771 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:58,771 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-07-23 15:24:58,771 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 15:24:58,772 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 15:24:58,772 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:24:58,772 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 18 states. [2018-07-23 15:24:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:58,875 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-07-23 15:24:58,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 15:24:58,876 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 60 [2018-07-23 15:24:58,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:58,877 INFO L225 Difference]: With dead ends: 65 [2018-07-23 15:24:58,877 INFO L226 Difference]: Without dead ends: 63 [2018-07-23 15:24:58,878 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:24:58,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-07-23 15:24:58,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-07-23 15:24:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-07-23 15:24:58,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-07-23 15:24:58,920 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-07-23 15:24:58,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:58,921 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-07-23 15:24:58,921 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 15:24:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-07-23 15:24:58,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 15:24:58,921 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:58,922 INFO L353 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-07-23 15:24:58,922 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:58,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1008142301, now seen corresponding path program 27 times [2018-07-23 15:24:58,922 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:59,107 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 15:24:59,108 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:59,108 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-07-23 15:24:59,108 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 15:24:59,108 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 15:24:59,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:24:59,110 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-07-23 15:24:59,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:59,649 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2018-07-23 15:24:59,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 15:24:59,650 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-07-23 15:24:59,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:59,650 INFO L225 Difference]: With dead ends: 97 [2018-07-23 15:24:59,650 INFO L226 Difference]: Without dead ends: 65 [2018-07-23 15:24:59,652 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=2192, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:24:59,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-07-23 15:24:59,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-07-23 15:24:59,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-07-23 15:24:59,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-07-23 15:24:59,700 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-07-23 15:24:59,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:59,701 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-07-23 15:24:59,701 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 15:24:59,701 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-07-23 15:24:59,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-23 15:24:59,701 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:59,702 INFO L353 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-07-23 15:24:59,702 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:59,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1490325155, now seen corresponding path program 28 times [2018-07-23 15:24:59,702 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 210 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:59,773 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:59,774 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-07-23 15:24:59,774 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 15:24:59,774 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 15:24:59,775 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:24:59,775 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 19 states. [2018-07-23 15:24:59,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:59,883 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-07-23 15:24:59,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 15:24:59,883 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 64 [2018-07-23 15:24:59,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:59,884 INFO L225 Difference]: With dead ends: 69 [2018-07-23 15:24:59,884 INFO L226 Difference]: Without dead ends: 67 [2018-07-23 15:24:59,885 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:24:59,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-07-23 15:24:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-07-23 15:24:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-07-23 15:24:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-07-23 15:24:59,930 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-07-23 15:24:59,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:59,931 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-07-23 15:24:59,931 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 15:24:59,931 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-07-23 15:24:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-07-23 15:24:59,931 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:59,932 INFO L353 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-07-23 15:24:59,932 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:59,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1978312041, now seen corresponding path program 29 times [2018-07-23 15:24:59,932 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:00,159 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:00,159 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-07-23 15:25:00,159 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 15:25:00,160 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 15:25:00,160 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:25:00,161 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-07-23 15:25:00,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:00,749 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2018-07-23 15:25:00,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 15:25:00,750 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-07-23 15:25:00,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:00,750 INFO L225 Difference]: With dead ends: 103 [2018-07-23 15:25:00,751 INFO L226 Difference]: Without dead ends: 69 [2018-07-23 15:25:00,753 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=2482, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:25:00,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-07-23 15:25:00,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-07-23 15:25:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-07-23 15:25:00,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-07-23 15:25:00,815 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-07-23 15:25:00,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:00,815 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-07-23 15:25:00,815 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 15:25:00,816 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-07-23 15:25:00,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 15:25:00,816 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:00,817 INFO L353 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-07-23 15:25:00,817 INFO L414 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:00,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1465604399, now seen corresponding path program 30 times [2018-07-23 15:25:00,818 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 240 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:00,915 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:00,915 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-07-23 15:25:00,915 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 15:25:00,915 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 15:25:00,916 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:25:00,916 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 20 states. [2018-07-23 15:25:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:01,060 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-07-23 15:25:01,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 15:25:01,061 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2018-07-23 15:25:01,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:01,061 INFO L225 Difference]: With dead ends: 73 [2018-07-23 15:25:01,062 INFO L226 Difference]: Without dead ends: 71 [2018-07-23 15:25:01,063 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:25:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-07-23 15:25:01,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-07-23 15:25:01,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 15:25:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-07-23 15:25:01,131 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-07-23 15:25:01,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:01,131 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-07-23 15:25:01,132 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 15:25:01,132 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-07-23 15:25:01,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-07-23 15:25:01,134 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:01,135 INFO L353 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-07-23 15:25:01,135 INFO L414 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:01,135 INFO L82 PathProgramCache]: Analyzing trace with hash 303497995, now seen corresponding path program 31 times [2018-07-23 15:25:01,135 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:01,455 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:01,455 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-07-23 15:25:01,456 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 15:25:01,456 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 15:25:01,457 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:25:01,457 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-07-23 15:25:02,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:02,066 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2018-07-23 15:25:02,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 15:25:02,066 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-07-23 15:25:02,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:02,067 INFO L225 Difference]: With dead ends: 109 [2018-07-23 15:25:02,067 INFO L226 Difference]: Without dead ends: 73 [2018-07-23 15:25:02,069 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=2790, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:25:02,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-07-23 15:25:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-07-23 15:25:02,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-07-23 15:25:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-07-23 15:25:02,123 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-07-23 15:25:02,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:02,124 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-07-23 15:25:02,124 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 15:25:02,124 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-07-23 15:25:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-07-23 15:25:02,125 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:02,125 INFO L353 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-07-23 15:25:02,125 INFO L414 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:02,125 INFO L82 PathProgramCache]: Analyzing trace with hash -2091802043, now seen corresponding path program 32 times [2018-07-23 15:25:02,125 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 272 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:02,196 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:02,196 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-07-23 15:25:02,196 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 15:25:02,197 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 15:25:02,197 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:25:02,197 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 21 states. [2018-07-23 15:25:02,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:02,322 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-07-23 15:25:02,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 15:25:02,322 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 72 [2018-07-23 15:25:02,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:02,323 INFO L225 Difference]: With dead ends: 77 [2018-07-23 15:25:02,323 INFO L226 Difference]: Without dead ends: 75 [2018-07-23 15:25:02,325 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:25:02,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-07-23 15:25:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-07-23 15:25:02,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-07-23 15:25:02,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-07-23 15:25:02,381 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-07-23 15:25:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:02,382 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-07-23 15:25:02,382 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 15:25:02,382 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-07-23 15:25:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 15:25:02,383 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:02,383 INFO L353 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-07-23 15:25:02,383 INFO L414 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:02,383 INFO L82 PathProgramCache]: Analyzing trace with hash -177016449, now seen corresponding path program 33 times [2018-07-23 15:25:02,384 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:02,613 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:02,614 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-07-23 15:25:02,614 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 15:25:02,614 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 15:25:02,615 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:25:02,615 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-07-23 15:25:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:03,269 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-07-23 15:25:03,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 15:25:03,269 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-07-23 15:25:03,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:03,270 INFO L225 Difference]: With dead ends: 115 [2018-07-23 15:25:03,270 INFO L226 Difference]: Without dead ends: 77 [2018-07-23 15:25:03,272 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=3116, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:25:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-07-23 15:25:03,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-07-23 15:25:03,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-07-23 15:25:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-07-23 15:25:03,330 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-07-23 15:25:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:03,330 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-07-23 15:25:03,330 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 15:25:03,331 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-07-23 15:25:03,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-07-23 15:25:03,331 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:03,332 INFO L353 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-07-23 15:25:03,332 INFO L414 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:03,332 INFO L82 PathProgramCache]: Analyzing trace with hash -42507335, now seen corresponding path program 34 times [2018-07-23 15:25:03,332 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 306 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:03,404 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:03,404 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-07-23 15:25:03,404 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 15:25:03,404 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 15:25:03,405 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:25:03,405 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 22 states. [2018-07-23 15:25:03,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:03,537 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-07-23 15:25:03,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 15:25:03,538 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 76 [2018-07-23 15:25:03,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:03,539 INFO L225 Difference]: With dead ends: 81 [2018-07-23 15:25:03,539 INFO L226 Difference]: Without dead ends: 79 [2018-07-23 15:25:03,540 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:25:03,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-07-23 15:25:03,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-07-23 15:25:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-07-23 15:25:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-07-23 15:25:03,603 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-07-23 15:25:03,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:03,603 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-07-23 15:25:03,603 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 15:25:03,603 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-07-23 15:25:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-07-23 15:25:03,604 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:03,604 INFO L353 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-07-23 15:25:03,604 INFO L414 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:03,604 INFO L82 PathProgramCache]: Analyzing trace with hash 2100176371, now seen corresponding path program 35 times [2018-07-23 15:25:03,605 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:03,851 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:03,851 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-07-23 15:25:03,852 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 15:25:03,852 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 15:25:03,853 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:25:03,853 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-07-23 15:25:04,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:04,579 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2018-07-23 15:25:04,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 15:25:04,580 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-07-23 15:25:04,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:04,581 INFO L225 Difference]: With dead ends: 121 [2018-07-23 15:25:04,581 INFO L226 Difference]: Without dead ends: 81 [2018-07-23 15:25:04,583 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=3460, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:25:04,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-07-23 15:25:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-07-23 15:25:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-07-23 15:25:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-07-23 15:25:04,648 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-07-23 15:25:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:04,648 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-07-23 15:25:04,648 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 15:25:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-07-23 15:25:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 15:25:04,649 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:04,649 INFO L353 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-07-23 15:25:04,649 INFO L414 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:04,650 INFO L82 PathProgramCache]: Analyzing trace with hash 752544557, now seen corresponding path program 36 times [2018-07-23 15:25:04,650 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 342 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:04,743 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:04,743 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-07-23 15:25:04,744 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 15:25:04,744 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 15:25:04,744 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:25:04,745 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 23 states. [2018-07-23 15:25:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:04,905 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-07-23 15:25:04,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 15:25:04,905 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 80 [2018-07-23 15:25:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:04,906 INFO L225 Difference]: With dead ends: 85 [2018-07-23 15:25:04,906 INFO L226 Difference]: Without dead ends: 83 [2018-07-23 15:25:04,907 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:25:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-07-23 15:25:04,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-07-23 15:25:04,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-07-23 15:25:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-07-23 15:25:04,985 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-07-23 15:25:04,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:04,985 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-07-23 15:25:04,985 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 15:25:04,986 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-07-23 15:25:04,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-07-23 15:25:04,987 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:04,987 INFO L353 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-07-23 15:25:04,987 INFO L414 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:04,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1640865895, now seen corresponding path program 37 times [2018-07-23 15:25:04,988 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:05,309 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:05,309 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-07-23 15:25:05,310 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 15:25:05,310 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 15:25:05,311 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:25:05,311 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-07-23 15:25:06,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:06,042 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2018-07-23 15:25:06,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 15:25:06,042 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-07-23 15:25:06,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:06,043 INFO L225 Difference]: With dead ends: 127 [2018-07-23 15:25:06,043 INFO L226 Difference]: Without dead ends: 85 [2018-07-23 15:25:06,045 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=3822, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:25:06,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-07-23 15:25:06,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-07-23 15:25:06,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-07-23 15:25:06,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-07-23 15:25:06,106 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-07-23 15:25:06,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:06,107 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-07-23 15:25:06,107 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 15:25:06,107 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-07-23 15:25:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-07-23 15:25:06,107 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:06,108 INFO L353 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-07-23 15:25:06,108 INFO L414 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:06,108 INFO L82 PathProgramCache]: Analyzing trace with hash 918632609, now seen corresponding path program 38 times [2018-07-23 15:25:06,108 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:06,188 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 380 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:06,188 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:06,188 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-07-23 15:25:06,189 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 15:25:06,189 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 15:25:06,189 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:25:06,190 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 24 states. [2018-07-23 15:25:06,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:06,326 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-07-23 15:25:06,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 15:25:06,327 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 84 [2018-07-23 15:25:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:06,327 INFO L225 Difference]: With dead ends: 89 [2018-07-23 15:25:06,328 INFO L226 Difference]: Without dead ends: 87 [2018-07-23 15:25:06,329 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:25:06,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-07-23 15:25:06,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-07-23 15:25:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-07-23 15:25:06,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-07-23 15:25:06,391 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-07-23 15:25:06,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:06,391 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-07-23 15:25:06,391 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 15:25:06,391 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-07-23 15:25:06,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-23 15:25:06,392 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:06,392 INFO L353 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-07-23 15:25:06,392 INFO L414 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:06,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1957273381, now seen corresponding path program 39 times [2018-07-23 15:25:06,393 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:06,639 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:06,639 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-07-23 15:25:06,640 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 15:25:06,640 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 15:25:06,641 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:25:06,641 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-07-23 15:25:07,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:07,398 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2018-07-23 15:25:07,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 15:25:07,399 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-07-23 15:25:07,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:07,400 INFO L225 Difference]: With dead ends: 133 [2018-07-23 15:25:07,400 INFO L226 Difference]: Without dead ends: 89 [2018-07-23 15:25:07,401 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=4202, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:25:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-07-23 15:25:07,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-07-23 15:25:07,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 15:25:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-07-23 15:25:07,469 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-07-23 15:25:07,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:07,469 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-07-23 15:25:07,469 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 15:25:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-07-23 15:25:07,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-07-23 15:25:07,470 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:07,471 INFO L353 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-07-23 15:25:07,471 INFO L414 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:07,471 INFO L82 PathProgramCache]: Analyzing trace with hash 267340821, now seen corresponding path program 40 times [2018-07-23 15:25:07,471 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 420 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:07,546 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:07,547 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-07-23 15:25:07,547 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 15:25:07,547 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 15:25:07,548 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:25:07,548 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 25 states. [2018-07-23 15:25:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:07,685 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-07-23 15:25:07,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 15:25:07,685 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 88 [2018-07-23 15:25:07,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:07,686 INFO L225 Difference]: With dead ends: 93 [2018-07-23 15:25:07,686 INFO L226 Difference]: Without dead ends: 91 [2018-07-23 15:25:07,687 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:25:07,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-07-23 15:25:07,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-07-23 15:25:07,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-07-23 15:25:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-07-23 15:25:07,754 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-07-23 15:25:07,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:07,754 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-07-23 15:25:07,754 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 15:25:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-07-23 15:25:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-07-23 15:25:07,755 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:07,755 INFO L353 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-07-23 15:25:07,756 INFO L414 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:07,756 INFO L82 PathProgramCache]: Analyzing trace with hash -783456433, now seen corresponding path program 41 times [2018-07-23 15:25:07,756 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:08,000 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:08,000 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-07-23 15:25:08,000 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 15:25:08,001 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 15:25:08,001 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:25:08,002 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-07-23 15:25:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:08,764 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2018-07-23 15:25:08,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 15:25:08,764 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-07-23 15:25:08,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:08,765 INFO L225 Difference]: With dead ends: 139 [2018-07-23 15:25:08,765 INFO L226 Difference]: Without dead ends: 93 [2018-07-23 15:25:08,766 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=4600, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:25:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-07-23 15:25:08,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-07-23 15:25:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-07-23 15:25:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-07-23 15:25:08,837 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-07-23 15:25:08,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:08,837 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-07-23 15:25:08,837 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 15:25:08,837 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-07-23 15:25:08,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-07-23 15:25:08,838 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:08,838 INFO L353 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-07-23 15:25:08,838 INFO L414 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:08,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1017783689, now seen corresponding path program 42 times [2018-07-23 15:25:08,839 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 462 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:08,908 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:08,908 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-07-23 15:25:08,909 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 15:25:08,909 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 15:25:08,909 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:25:08,910 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 26 states. [2018-07-23 15:25:09,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:09,053 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-07-23 15:25:09,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 15:25:09,053 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 92 [2018-07-23 15:25:09,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:09,054 INFO L225 Difference]: With dead ends: 97 [2018-07-23 15:25:09,055 INFO L226 Difference]: Without dead ends: 95 [2018-07-23 15:25:09,056 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:25:09,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-07-23 15:25:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-07-23 15:25:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-07-23 15:25:09,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-07-23 15:25:09,129 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-07-23 15:25:09,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:09,130 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-07-23 15:25:09,130 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 15:25:09,130 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-07-23 15:25:09,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-07-23 15:25:09,131 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:09,131 INFO L353 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-07-23 15:25:09,131 INFO L414 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:09,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1162366013, now seen corresponding path program 43 times [2018-07-23 15:25:09,132 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:09,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 1012 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:09,386 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:09,387 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-07-23 15:25:09,387 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 15:25:09,387 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 15:25:09,388 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:25:09,388 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-07-23 15:25:10,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:10,210 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2018-07-23 15:25:10,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 15:25:10,210 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-07-23 15:25:10,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:10,211 INFO L225 Difference]: With dead ends: 145 [2018-07-23 15:25:10,211 INFO L226 Difference]: Without dead ends: 97 [2018-07-23 15:25:10,213 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=5016, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:25:10,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-07-23 15:25:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-07-23 15:25:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-07-23 15:25:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-07-23 15:25:10,295 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-07-23 15:25:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:10,295 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-07-23 15:25:10,295 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 15:25:10,296 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-07-23 15:25:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-07-23 15:25:10,296 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:10,296 INFO L353 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-07-23 15:25:10,297 INFO L414 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:10,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1867070211, now seen corresponding path program 44 times [2018-07-23 15:25:10,297 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 506 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:10,380 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:10,381 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-07-23 15:25:10,381 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 15:25:10,381 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 15:25:10,381 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:25:10,382 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 27 states. [2018-07-23 15:25:10,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:10,546 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-07-23 15:25:10,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 15:25:10,546 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 96 [2018-07-23 15:25:10,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:10,547 INFO L225 Difference]: With dead ends: 101 [2018-07-23 15:25:10,547 INFO L226 Difference]: Without dead ends: 99 [2018-07-23 15:25:10,548 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:25:10,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-07-23 15:25:10,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-07-23 15:25:10,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-07-23 15:25:10,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-07-23 15:25:10,632 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-07-23 15:25:10,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:10,632 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-07-23 15:25:10,632 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 15:25:10,632 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-07-23 15:25:10,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-07-23 15:25:10,633 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:10,633 INFO L353 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-07-23 15:25:10,634 INFO L414 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:10,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1041909303, now seen corresponding path program 45 times [2018-07-23 15:25:10,634 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 1104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:10,914 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:10,914 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-07-23 15:25:10,914 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 15:25:10,915 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 15:25:10,915 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:25:10,916 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-07-23 15:25:11,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:11,892 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-07-23 15:25:11,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 15:25:11,892 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-07-23 15:25:11,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:11,893 INFO L225 Difference]: With dead ends: 151 [2018-07-23 15:25:11,893 INFO L226 Difference]: Without dead ends: 101 [2018-07-23 15:25:11,895 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=5450, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:25:11,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-07-23 15:25:12,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-07-23 15:25:12,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-07-23 15:25:12,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-07-23 15:25:12,013 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-07-23 15:25:12,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:12,014 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-07-23 15:25:12,014 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 15:25:12,014 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-07-23 15:25:12,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-07-23 15:25:12,015 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:12,015 INFO L353 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-07-23 15:25:12,015 INFO L414 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:12,015 INFO L82 PathProgramCache]: Analyzing trace with hash -279303567, now seen corresponding path program 46 times [2018-07-23 15:25:12,016 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 552 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:12,111 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:12,112 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-07-23 15:25:12,112 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 15:25:12,112 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 15:25:12,113 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:25:12,113 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 28 states. [2018-07-23 15:25:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:12,284 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-07-23 15:25:12,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 15:25:12,285 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 100 [2018-07-23 15:25:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:12,286 INFO L225 Difference]: With dead ends: 105 [2018-07-23 15:25:12,286 INFO L226 Difference]: Without dead ends: 103 [2018-07-23 15:25:12,287 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:25:12,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-07-23 15:25:12,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-07-23 15:25:12,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-07-23 15:25:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-07-23 15:25:12,379 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-07-23 15:25:12,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:12,380 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-07-23 15:25:12,380 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 15:25:12,380 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-07-23 15:25:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-07-23 15:25:12,381 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:12,381 INFO L353 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-07-23 15:25:12,382 INFO L414 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:12,382 INFO L82 PathProgramCache]: Analyzing trace with hash -2122703189, now seen corresponding path program 47 times [2018-07-23 15:25:12,382 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 1200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:12,656 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:12,656 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-07-23 15:25:12,656 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 15:25:12,657 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 15:25:12,657 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:25:12,658 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-07-23 15:25:13,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:13,535 INFO L93 Difference]: Finished difference Result 157 states and 159 transitions. [2018-07-23 15:25:13,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 15:25:13,535 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-07-23 15:25:13,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:13,537 INFO L225 Difference]: With dead ends: 157 [2018-07-23 15:25:13,537 INFO L226 Difference]: Without dead ends: 105 [2018-07-23 15:25:13,539 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=5902, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:25:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-07-23 15:25:13,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-07-23 15:25:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-07-23 15:25:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-07-23 15:25:13,633 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-07-23 15:25:13,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:13,633 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-07-23 15:25:13,633 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 15:25:13,633 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-07-23 15:25:13,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-07-23 15:25:13,634 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:13,634 INFO L353 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-07-23 15:25:13,635 INFO L414 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:13,635 INFO L82 PathProgramCache]: Analyzing trace with hash 190404069, now seen corresponding path program 48 times [2018-07-23 15:25:13,635 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 600 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:13,722 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:13,722 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-07-23 15:25:13,723 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 15:25:13,723 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 15:25:13,723 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:25:13,723 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 29 states. [2018-07-23 15:25:13,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:13,892 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-07-23 15:25:13,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 15:25:13,892 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 104 [2018-07-23 15:25:13,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:13,893 INFO L225 Difference]: With dead ends: 109 [2018-07-23 15:25:13,893 INFO L226 Difference]: Without dead ends: 107 [2018-07-23 15:25:13,894 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:25:13,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-07-23 15:25:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-07-23 15:25:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 15:25:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-07-23 15:25:13,996 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-07-23 15:25:13,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:13,996 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-07-23 15:25:13,996 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 15:25:13,997 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-07-23 15:25:13,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-07-23 15:25:13,997 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:13,998 INFO L353 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-07-23 15:25:13,998 INFO L414 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:13,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1705231073, now seen corresponding path program 49 times [2018-07-23 15:25:13,999 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 1300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:14,279 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:14,279 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-07-23 15:25:14,279 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 15:25:14,279 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 15:25:14,280 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:25:14,281 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-07-23 15:25:15,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:15,267 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2018-07-23 15:25:15,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 15:25:15,267 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-07-23 15:25:15,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:15,268 INFO L225 Difference]: With dead ends: 163 [2018-07-23 15:25:15,268 INFO L226 Difference]: Without dead ends: 109 [2018-07-23 15:25:15,269 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=6372, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:25:15,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-07-23 15:25:15,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-07-23 15:25:15,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-07-23 15:25:15,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-07-23 15:25:15,367 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-07-23 15:25:15,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:15,367 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-07-23 15:25:15,367 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 15:25:15,367 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-07-23 15:25:15,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-07-23 15:25:15,368 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:15,368 INFO L353 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-07-23 15:25:15,369 INFO L414 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:15,369 INFO L82 PathProgramCache]: Analyzing trace with hash 653870937, now seen corresponding path program 50 times [2018-07-23 15:25:15,369 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 650 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:15,449 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:15,449 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-07-23 15:25:15,449 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 15:25:15,449 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 15:25:15,450 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:25:15,450 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 30 states. [2018-07-23 15:25:15,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:15,624 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-07-23 15:25:15,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 15:25:15,625 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 108 [2018-07-23 15:25:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:15,626 INFO L225 Difference]: With dead ends: 113 [2018-07-23 15:25:15,626 INFO L226 Difference]: Without dead ends: 111 [2018-07-23 15:25:15,627 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:25:15,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-07-23 15:25:15,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-07-23 15:25:15,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-07-23 15:25:15,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-07-23 15:25:15,723 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-07-23 15:25:15,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:15,724 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-07-23 15:25:15,724 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 15:25:15,724 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-07-23 15:25:15,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-07-23 15:25:15,725 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:15,725 INFO L353 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-07-23 15:25:15,725 INFO L414 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:15,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1304797587, now seen corresponding path program 51 times [2018-07-23 15:25:15,725 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:16,009 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:16,009 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-07-23 15:25:16,010 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 15:25:16,010 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 15:25:16,011 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:25:16,011 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-07-23 15:25:16,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:16,964 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2018-07-23 15:25:16,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 15:25:16,964 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-07-23 15:25:16,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:16,965 INFO L225 Difference]: With dead ends: 169 [2018-07-23 15:25:16,965 INFO L226 Difference]: Without dead ends: 113 [2018-07-23 15:25:16,967 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=6860, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:25:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-07-23 15:25:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-07-23 15:25:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-07-23 15:25:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-07-23 15:25:17,067 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-07-23 15:25:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:17,067 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-07-23 15:25:17,067 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 15:25:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-07-23 15:25:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-07-23 15:25:17,068 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:17,068 INFO L353 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-07-23 15:25:17,069 INFO L414 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:17,069 INFO L82 PathProgramCache]: Analyzing trace with hash -738263347, now seen corresponding path program 52 times [2018-07-23 15:25:17,069 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 702 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:17,152 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:17,152 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-07-23 15:25:17,152 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 15:25:17,152 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 15:25:17,153 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:25:17,153 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 31 states. [2018-07-23 15:25:17,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:17,343 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-07-23 15:25:17,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 15:25:17,344 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 112 [2018-07-23 15:25:17,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:17,345 INFO L225 Difference]: With dead ends: 117 [2018-07-23 15:25:17,345 INFO L226 Difference]: Without dead ends: 115 [2018-07-23 15:25:17,346 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:25:17,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-07-23 15:25:17,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-07-23 15:25:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-07-23 15:25:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-07-23 15:25:17,465 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-07-23 15:25:17,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:17,466 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-07-23 15:25:17,466 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 15:25:17,466 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-07-23 15:25:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-07-23 15:25:17,467 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:17,467 INFO L353 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-07-23 15:25:17,467 INFO L414 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:17,468 INFO L82 PathProgramCache]: Analyzing trace with hash -801420281, now seen corresponding path program 53 times [2018-07-23 15:25:17,468 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:17,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 1512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:17,794 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:17,794 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-07-23 15:25:17,794 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 15:25:17,795 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 15:25:17,795 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:25:17,796 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-07-23 15:25:18,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:18,998 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2018-07-23 15:25:18,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 15:25:18,998 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-07-23 15:25:18,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:18,999 INFO L225 Difference]: With dead ends: 175 [2018-07-23 15:25:18,999 INFO L226 Difference]: Without dead ends: 117 [2018-07-23 15:25:19,000 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=7366, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:25:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-07-23 15:25:19,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-07-23 15:25:19,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-07-23 15:25:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-07-23 15:25:19,117 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-07-23 15:25:19,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:19,117 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-07-23 15:25:19,118 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 15:25:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-07-23 15:25:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-07-23 15:25:19,119 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:19,119 INFO L353 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-07-23 15:25:19,119 INFO L414 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:19,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1280345023, now seen corresponding path program 54 times [2018-07-23 15:25:19,119 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 756 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:19,218 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:19,218 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-07-23 15:25:19,219 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 15:25:19,219 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 15:25:19,219 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:25:19,220 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 32 states. [2018-07-23 15:25:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:19,428 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-07-23 15:25:19,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 15:25:19,429 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 116 [2018-07-23 15:25:19,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:19,430 INFO L225 Difference]: With dead ends: 121 [2018-07-23 15:25:19,430 INFO L226 Difference]: Without dead ends: 119 [2018-07-23 15:25:19,431 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:25:19,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-07-23 15:25:19,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-07-23 15:25:19,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-07-23 15:25:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-07-23 15:25:19,559 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-07-23 15:25:19,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:19,560 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-07-23 15:25:19,560 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 15:25:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-07-23 15:25:19,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-07-23 15:25:19,561 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:19,561 INFO L353 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-07-23 15:25:19,561 INFO L414 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:19,562 INFO L82 PathProgramCache]: Analyzing trace with hash -2050868101, now seen corresponding path program 55 times [2018-07-23 15:25:19,562 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 1624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:19,911 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:19,912 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-07-23 15:25:19,912 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-23 15:25:19,912 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-23 15:25:19,913 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:25:19,913 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2018-07-23 15:25:21,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:21,033 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2018-07-23 15:25:21,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 15:25:21,033 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-07-23 15:25:21,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:21,034 INFO L225 Difference]: With dead ends: 181 [2018-07-23 15:25:21,034 INFO L226 Difference]: Without dead ends: 121 [2018-07-23 15:25:21,036 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=7890, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:25:21,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-07-23 15:25:21,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-07-23 15:25:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-07-23 15:25:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-07-23 15:25:21,152 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-07-23 15:25:21,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:21,152 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-07-23 15:25:21,153 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-23 15:25:21,153 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-07-23 15:25:21,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-07-23 15:25:21,154 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:21,154 INFO L353 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-07-23 15:25:21,154 INFO L414 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:21,155 INFO L82 PathProgramCache]: Analyzing trace with hash 919584693, now seen corresponding path program 56 times [2018-07-23 15:25:21,155 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 812 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:21,265 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:21,265 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-07-23 15:25:21,265 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 15:25:21,266 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 15:25:21,266 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:25:21,266 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 33 states. [2018-07-23 15:25:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:21,487 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-07-23 15:25:21,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 15:25:21,488 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 120 [2018-07-23 15:25:21,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:21,489 INFO L225 Difference]: With dead ends: 125 [2018-07-23 15:25:21,489 INFO L226 Difference]: Without dead ends: 123 [2018-07-23 15:25:21,490 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:25:21,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-07-23 15:25:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-07-23 15:25:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-07-23 15:25:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-07-23 15:25:21,607 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-07-23 15:25:21,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:21,608 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-07-23 15:25:21,608 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 15:25:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-07-23 15:25:21,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-07-23 15:25:21,609 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:21,609 INFO L353 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-07-23 15:25:21,609 INFO L414 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:21,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1042320657, now seen corresponding path program 57 times [2018-07-23 15:25:21,610 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:21,913 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:21,913 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-07-23 15:25:21,913 INFO L450 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-23 15:25:21,913 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-23 15:25:21,914 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:25:21,914 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 62 states. [2018-07-23 15:25:22,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:22,946 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2018-07-23 15:25:22,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 15:25:22,946 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-07-23 15:25:22,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:22,947 INFO L225 Difference]: With dead ends: 187 [2018-07-23 15:25:22,947 INFO L226 Difference]: Without dead ends: 125 [2018-07-23 15:25:22,949 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=310, Invalid=8432, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:25:22,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-07-23 15:25:23,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-07-23 15:25:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 15:25:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-07-23 15:25:23,085 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-07-23 15:25:23,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:23,085 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-07-23 15:25:23,085 INFO L472 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-23 15:25:23,085 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-07-23 15:25:23,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-07-23 15:25:23,086 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:23,086 INFO L353 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-07-23 15:25:23,086 INFO L414 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:23,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1571080489, now seen corresponding path program 58 times [2018-07-23 15:25:23,087 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 870 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:23,186 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:23,186 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-07-23 15:25:23,187 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 15:25:23,187 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 15:25:23,187 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:25:23,188 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 34 states. [2018-07-23 15:25:23,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:23,428 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-07-23 15:25:23,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 15:25:23,428 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 124 [2018-07-23 15:25:23,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:23,429 INFO L225 Difference]: With dead ends: 129 [2018-07-23 15:25:23,429 INFO L226 Difference]: Without dead ends: 127 [2018-07-23 15:25:23,430 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:25:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-07-23 15:25:23,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-07-23 15:25:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-07-23 15:25:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-07-23 15:25:23,583 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-07-23 15:25:23,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:23,583 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-07-23 15:25:23,583 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 15:25:23,583 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-07-23 15:25:23,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-07-23 15:25:23,584 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:23,584 INFO L353 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-07-23 15:25:23,585 INFO L414 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:23,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2020085917, now seen corresponding path program 59 times [2018-07-23 15:25:23,585 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 1860 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:23,962 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:23,962 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-07-23 15:25:23,963 INFO L450 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-23 15:25:23,963 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-23 15:25:23,964 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:25:23,964 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 64 states. [2018-07-23 15:25:25,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:25,153 INFO L93 Difference]: Finished difference Result 193 states and 195 transitions. [2018-07-23 15:25:25,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 15:25:25,154 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-07-23 15:25:25,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:25,155 INFO L225 Difference]: With dead ends: 193 [2018-07-23 15:25:25,155 INFO L226 Difference]: Without dead ends: 129 [2018-07-23 15:25:25,157 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=8992, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:25:25,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-07-23 15:25:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-07-23 15:25:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-07-23 15:25:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-07-23 15:25:25,285 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-07-23 15:25:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:25,286 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-07-23 15:25:25,286 INFO L472 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-23 15:25:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-07-23 15:25:25,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-07-23 15:25:25,287 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:25,287 INFO L353 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-07-23 15:25:25,287 INFO L414 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:25,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2012453021, now seen corresponding path program 60 times [2018-07-23 15:25:25,287 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 930 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:25,395 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:25,395 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-07-23 15:25:25,395 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 15:25:25,396 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 15:25:25,396 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:25:25,396 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 35 states. [2018-07-23 15:25:25,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:25,630 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-07-23 15:25:25,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 15:25:25,631 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 128 [2018-07-23 15:25:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:25,632 INFO L225 Difference]: With dead ends: 133 [2018-07-23 15:25:25,632 INFO L226 Difference]: Without dead ends: 131 [2018-07-23 15:25:25,633 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:25:25,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-07-23 15:25:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-07-23 15:25:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-07-23 15:25:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-07-23 15:25:25,737 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-07-23 15:25:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:25,738 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-07-23 15:25:25,738 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 15:25:25,738 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-07-23 15:25:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-07-23 15:25:25,739 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:25,739 INFO L353 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-07-23 15:25:25,740 INFO L414 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:25,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1232122327, now seen corresponding path program 61 times [2018-07-23 15:25:25,740 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 1984 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:26,158 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:26,158 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-07-23 15:25:26,159 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-23 15:25:26,159 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-23 15:25:26,160 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:25:26,160 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 66 states. [2018-07-23 15:25:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:27,100 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2018-07-23 15:25:27,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 15:25:27,100 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-07-23 15:25:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:27,101 INFO L225 Difference]: With dead ends: 199 [2018-07-23 15:25:27,101 INFO L226 Difference]: Without dead ends: 133 [2018-07-23 15:25:27,102 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=330, Invalid=9570, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:25:27,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-07-23 15:25:27,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-07-23 15:25:27,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-07-23 15:25:27,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-07-23 15:25:27,235 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-07-23 15:25:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:27,236 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-07-23 15:25:27,236 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-23 15:25:27,236 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-07-23 15:25:27,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-07-23 15:25:27,238 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:27,238 INFO L353 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-07-23 15:25:27,239 INFO L414 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:27,240 INFO L82 PathProgramCache]: Analyzing trace with hash -452907503, now seen corresponding path program 62 times [2018-07-23 15:25:27,240 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 992 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:27,355 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:27,355 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-07-23 15:25:27,355 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 15:25:27,356 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 15:25:27,356 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:25:27,360 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 36 states. [2018-07-23 15:25:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:27,636 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-07-23 15:25:27,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 15:25:27,637 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 132 [2018-07-23 15:25:27,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:27,638 INFO L225 Difference]: With dead ends: 137 [2018-07-23 15:25:27,638 INFO L226 Difference]: Without dead ends: 135 [2018-07-23 15:25:27,639 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:25:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-07-23 15:25:27,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-07-23 15:25:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-07-23 15:25:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-07-23 15:25:27,812 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-07-23 15:25:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:27,812 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-07-23 15:25:27,812 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 15:25:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-07-23 15:25:27,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-07-23 15:25:27,813 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:27,813 INFO L353 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-07-23 15:25:27,814 INFO L414 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:27,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1452361141, now seen corresponding path program 63 times [2018-07-23 15:25:27,814 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 2112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:28,231 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:28,231 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-07-23 15:25:28,232 INFO L450 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-23 15:25:28,232 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-23 15:25:28,232 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:25:28,233 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 68 states. [2018-07-23 15:25:29,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:29,368 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2018-07-23 15:25:29,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 15:25:29,369 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-07-23 15:25:29,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:29,369 INFO L225 Difference]: With dead ends: 205 [2018-07-23 15:25:29,370 INFO L226 Difference]: Without dead ends: 137 [2018-07-23 15:25:29,371 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=340, Invalid=10166, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:25:29,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-07-23 15:25:29,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-07-23 15:25:29,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-07-23 15:25:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-07-23 15:25:29,503 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-07-23 15:25:29,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:29,503 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-07-23 15:25:29,503 INFO L472 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-23 15:25:29,503 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-07-23 15:25:29,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-07-23 15:25:29,504 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:29,504 INFO L353 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-07-23 15:25:29,504 INFO L414 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:29,505 INFO L82 PathProgramCache]: Analyzing trace with hash -745371259, now seen corresponding path program 64 times [2018-07-23 15:25:29,505 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1056 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:29,655 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:29,655 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-07-23 15:25:29,655 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 15:25:29,656 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 15:25:29,656 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:25:29,656 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 37 states. [2018-07-23 15:25:29,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:29,934 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-07-23 15:25:29,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 15:25:29,935 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 136 [2018-07-23 15:25:29,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:29,936 INFO L225 Difference]: With dead ends: 141 [2018-07-23 15:25:29,936 INFO L226 Difference]: Without dead ends: 139 [2018-07-23 15:25:29,937 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:25:29,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-07-23 15:25:30,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-07-23 15:25:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-07-23 15:25:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-07-23 15:25:30,117 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-07-23 15:25:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:30,117 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-07-23 15:25:30,117 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 15:25:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-07-23 15:25:30,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-07-23 15:25:30,118 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:30,118 INFO L353 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-07-23 15:25:30,119 INFO L414 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:30,119 INFO L82 PathProgramCache]: Analyzing trace with hash 957810879, now seen corresponding path program 65 times [2018-07-23 15:25:30,119 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 2244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:30,512 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:30,512 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-07-23 15:25:30,512 INFO L450 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-23 15:25:30,513 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-23 15:25:30,513 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:25:30,513 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 70 states. [2018-07-23 15:25:31,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:31,513 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-07-23 15:25:31,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 15:25:31,513 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-07-23 15:25:31,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:31,514 INFO L225 Difference]: With dead ends: 211 [2018-07-23 15:25:31,514 INFO L226 Difference]: Without dead ends: 141 [2018-07-23 15:25:31,515 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=350, Invalid=10780, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:25:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-07-23 15:25:31,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-07-23 15:25:31,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-07-23 15:25:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-07-23 15:25:31,623 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-07-23 15:25:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:31,623 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-07-23 15:25:31,623 INFO L472 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-23 15:25:31,624 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-07-23 15:25:31,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-07-23 15:25:31,624 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:31,624 INFO L353 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-07-23 15:25:31,625 INFO L414 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:31,625 INFO L82 PathProgramCache]: Analyzing trace with hash 32287481, now seen corresponding path program 66 times [2018-07-23 15:25:31,625 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1122 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:31,735 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:31,736 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-07-23 15:25:31,736 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 15:25:31,736 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 15:25:31,737 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:25:31,737 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 38 states. [2018-07-23 15:25:32,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:32,041 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-07-23 15:25:32,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 15:25:32,041 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 140 [2018-07-23 15:25:32,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:32,043 INFO L225 Difference]: With dead ends: 145 [2018-07-23 15:25:32,043 INFO L226 Difference]: Without dead ends: 143 [2018-07-23 15:25:32,043 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:25:32,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-07-23 15:25:32,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-07-23 15:25:32,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-07-23 15:25:32,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-07-23 15:25:32,231 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-07-23 15:25:32,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:32,232 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-07-23 15:25:32,232 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 15:25:32,232 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-07-23 15:25:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-07-23 15:25:32,233 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:32,233 INFO L353 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-07-23 15:25:32,233 INFO L414 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:32,234 INFO L82 PathProgramCache]: Analyzing trace with hash 963550515, now seen corresponding path program 67 times [2018-07-23 15:25:32,234 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:32,633 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:32,633 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-07-23 15:25:32,633 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 15:25:32,633 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 15:25:32,634 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:25:32,634 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 72 states. [2018-07-23 15:25:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:33,737 INFO L93 Difference]: Finished difference Result 217 states and 219 transitions. [2018-07-23 15:25:33,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 15:25:33,737 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-07-23 15:25:33,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:33,738 INFO L225 Difference]: With dead ends: 217 [2018-07-23 15:25:33,738 INFO L226 Difference]: Without dead ends: 145 [2018-07-23 15:25:33,739 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=11412, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:25:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-07-23 15:25:33,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-07-23 15:25:33,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-07-23 15:25:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-07-23 15:25:33,869 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-07-23 15:25:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:33,869 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-07-23 15:25:33,869 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 15:25:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-07-23 15:25:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-07-23 15:25:33,870 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:33,870 INFO L353 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-07-23 15:25:33,870 INFO L414 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:33,871 INFO L82 PathProgramCache]: Analyzing trace with hash 2111083117, now seen corresponding path program 68 times [2018-07-23 15:25:33,871 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1190 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:33,994 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:33,994 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-07-23 15:25:33,995 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 15:25:33,995 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 15:25:33,995 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=776, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:25:33,995 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 39 states. [2018-07-23 15:25:34,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:34,332 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-07-23 15:25:34,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 15:25:34,332 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 144 [2018-07-23 15:25:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:34,333 INFO L225 Difference]: With dead ends: 149 [2018-07-23 15:25:34,333 INFO L226 Difference]: Without dead ends: 147 [2018-07-23 15:25:34,334 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:25:34,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-07-23 15:25:34,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-07-23 15:25:34,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-07-23 15:25:34,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-07-23 15:25:34,527 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-07-23 15:25:34,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:34,527 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-07-23 15:25:34,527 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 15:25:34,527 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-07-23 15:25:34,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-07-23 15:25:34,528 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:34,528 INFO L353 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-07-23 15:25:34,528 INFO L414 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:34,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1526364071, now seen corresponding path program 69 times [2018-07-23 15:25:34,529 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 2520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:34,997 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:34,997 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-07-23 15:25:34,998 INFO L450 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-23 15:25:34,998 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-23 15:25:34,998 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:25:34,998 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 74 states. [2018-07-23 15:25:36,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:36,201 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2018-07-23 15:25:36,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 15:25:36,201 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-07-23 15:25:36,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:36,202 INFO L225 Difference]: With dead ends: 223 [2018-07-23 15:25:36,202 INFO L226 Difference]: Without dead ends: 149 [2018-07-23 15:25:36,203 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=370, Invalid=12062, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:25:36,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-07-23 15:25:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-07-23 15:25:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-07-23 15:25:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-07-23 15:25:36,325 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-07-23 15:25:36,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:36,326 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-07-23 15:25:36,326 INFO L472 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-23 15:25:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-07-23 15:25:36,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-07-23 15:25:36,327 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:36,327 INFO L353 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-07-23 15:25:36,327 INFO L414 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:36,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1687109601, now seen corresponding path program 70 times [2018-07-23 15:25:36,328 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1260 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:36,425 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:36,425 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-07-23 15:25:36,426 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 15:25:36,426 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 15:25:36,426 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=816, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:25:36,426 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 40 states. [2018-07-23 15:25:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:36,683 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-07-23 15:25:36,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 15:25:36,683 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 148 [2018-07-23 15:25:36,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:36,684 INFO L225 Difference]: With dead ends: 153 [2018-07-23 15:25:36,684 INFO L226 Difference]: Without dead ends: 151 [2018-07-23 15:25:36,685 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:25:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-07-23 15:25:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-07-23 15:25:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-07-23 15:25:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-07-23 15:25:36,805 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-07-23 15:25:36,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:36,806 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-07-23 15:25:36,806 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 15:25:36,806 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-07-23 15:25:36,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-07-23 15:25:36,807 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:36,807 INFO L353 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-07-23 15:25:36,807 INFO L414 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:36,807 INFO L82 PathProgramCache]: Analyzing trace with hash 2109708315, now seen corresponding path program 71 times [2018-07-23 15:25:36,807 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 2664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:37,242 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:37,242 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-07-23 15:25:37,242 INFO L450 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-23 15:25:37,242 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-23 15:25:37,243 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:25:37,243 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 76 states. [2018-07-23 15:25:38,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:38,438 INFO L93 Difference]: Finished difference Result 229 states and 231 transitions. [2018-07-23 15:25:38,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 15:25:38,439 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-07-23 15:25:38,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:38,440 INFO L225 Difference]: With dead ends: 229 [2018-07-23 15:25:38,440 INFO L226 Difference]: Without dead ends: 153 [2018-07-23 15:25:38,441 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=12730, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:25:38,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-07-23 15:25:38,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-07-23 15:25:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-07-23 15:25:38,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-07-23 15:25:38,567 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-07-23 15:25:38,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:38,567 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-07-23 15:25:38,567 INFO L472 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-23 15:25:38,567 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-07-23 15:25:38,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-07-23 15:25:38,568 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:38,568 INFO L353 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-07-23 15:25:38,569 INFO L414 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:38,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1562266795, now seen corresponding path program 72 times [2018-07-23 15:25:38,569 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1332 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:38,667 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:38,667 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-07-23 15:25:38,667 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 15:25:38,667 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 15:25:38,667 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=857, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:25:38,668 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 41 states. [2018-07-23 15:25:38,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:38,909 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-07-23 15:25:38,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 15:25:38,909 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 152 [2018-07-23 15:25:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:38,911 INFO L225 Difference]: With dead ends: 157 [2018-07-23 15:25:38,911 INFO L226 Difference]: Without dead ends: 155 [2018-07-23 15:25:38,911 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:25:38,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-07-23 15:25:39,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-07-23 15:25:39,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-07-23 15:25:39,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-07-23 15:25:39,056 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-07-23 15:25:39,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:39,056 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-07-23 15:25:39,056 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 15:25:39,056 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-07-23 15:25:39,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-07-23 15:25:39,057 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:39,057 INFO L353 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-07-23 15:25:39,058 INFO L414 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:39,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1900215951, now seen corresponding path program 73 times [2018-07-23 15:25:39,058 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 2812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:39,499 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:39,499 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-07-23 15:25:39,500 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-23 15:25:39,500 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-23 15:25:39,500 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:25:39,500 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 78 states. [2018-07-23 15:25:40,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:40,822 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2018-07-23 15:25:40,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 15:25:40,822 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-07-23 15:25:40,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:40,824 INFO L225 Difference]: With dead ends: 235 [2018-07-23 15:25:40,824 INFO L226 Difference]: Without dead ends: 157 [2018-07-23 15:25:40,825 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=390, Invalid=13416, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:25:40,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-07-23 15:25:40,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-07-23 15:25:40,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-07-23 15:25:40,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-07-23 15:25:40,974 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-07-23 15:25:40,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:40,975 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-07-23 15:25:40,975 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-23 15:25:40,975 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-07-23 15:25:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-07-23 15:25:40,976 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:40,976 INFO L353 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-07-23 15:25:40,976 INFO L414 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:40,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1257182007, now seen corresponding path program 74 times [2018-07-23 15:25:40,976 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1406 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:41,074 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:41,075 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-07-23 15:25:41,075 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 15:25:41,075 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 15:25:41,075 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=823, Invalid=899, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:25:41,076 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 42 states. [2018-07-23 15:25:41,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:41,310 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-07-23 15:25:41,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 15:25:41,311 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 156 [2018-07-23 15:25:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:41,312 INFO L225 Difference]: With dead ends: 161 [2018-07-23 15:25:41,312 INFO L226 Difference]: Without dead ends: 159 [2018-07-23 15:25:41,313 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:25:41,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-07-23 15:25:41,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-07-23 15:25:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-07-23 15:25:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-07-23 15:25:41,451 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-07-23 15:25:41,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:41,451 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-07-23 15:25:41,451 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 15:25:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-07-23 15:25:41,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-07-23 15:25:41,452 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:41,452 INFO L353 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-07-23 15:25:41,453 INFO L414 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:41,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1266046205, now seen corresponding path program 75 times [2018-07-23 15:25:41,453 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 2964 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:41,819 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:41,819 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-07-23 15:25:41,820 INFO L450 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-23 15:25:41,820 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-23 15:25:41,821 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:25:41,821 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 80 states. [2018-07-23 15:25:43,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:43,132 INFO L93 Difference]: Finished difference Result 241 states and 243 transitions. [2018-07-23 15:25:43,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 15:25:43,132 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-07-23 15:25:43,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:43,133 INFO L225 Difference]: With dead ends: 241 [2018-07-23 15:25:43,133 INFO L226 Difference]: Without dead ends: 161 [2018-07-23 15:25:43,135 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=400, Invalid=14120, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:25:43,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-07-23 15:25:43,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-07-23 15:25:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-07-23 15:25:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-07-23 15:25:43,275 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-07-23 15:25:43,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:43,275 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-07-23 15:25:43,275 INFO L472 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-23 15:25:43,275 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-07-23 15:25:43,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-07-23 15:25:43,276 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:43,276 INFO L353 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-07-23 15:25:43,276 INFO L414 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:43,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1726082109, now seen corresponding path program 76 times [2018-07-23 15:25:43,276 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1482 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:43,408 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:43,409 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-07-23 15:25:43,409 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 15:25:43,409 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 15:25:43,409 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=942, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:25:43,409 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 43 states. [2018-07-23 15:25:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:43,636 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-07-23 15:25:43,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 15:25:43,637 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 160 [2018-07-23 15:25:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:43,638 INFO L225 Difference]: With dead ends: 165 [2018-07-23 15:25:43,638 INFO L226 Difference]: Without dead ends: 163 [2018-07-23 15:25:43,638 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:25:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-07-23 15:25:43,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-07-23 15:25:43,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-07-23 15:25:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-07-23 15:25:43,792 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-07-23 15:25:43,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:43,793 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-07-23 15:25:43,793 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 15:25:43,793 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-07-23 15:25:43,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-07-23 15:25:43,794 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:43,794 INFO L353 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-07-23 15:25:43,794 INFO L414 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:43,795 INFO L82 PathProgramCache]: Analyzing trace with hash 907582839, now seen corresponding path program 77 times [2018-07-23 15:25:43,795 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 3120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:44,193 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:44,193 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-07-23 15:25:44,194 INFO L450 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-23 15:25:44,194 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-23 15:25:44,194 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:25:44,195 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 82 states. [2018-07-23 15:25:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:45,587 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2018-07-23 15:25:45,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 15:25:45,588 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-07-23 15:25:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:45,589 INFO L225 Difference]: With dead ends: 247 [2018-07-23 15:25:45,589 INFO L226 Difference]: Without dead ends: 165 [2018-07-23 15:25:45,591 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=410, Invalid=14842, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:25:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-07-23 15:25:45,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-07-23 15:25:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-07-23 15:25:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-07-23 15:25:45,823 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-07-23 15:25:45,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:45,823 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-07-23 15:25:45,823 INFO L472 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-23 15:25:45,824 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-07-23 15:25:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-07-23 15:25:45,824 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:45,825 INFO L353 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-07-23 15:25:45,825 INFO L414 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:45,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1818644047, now seen corresponding path program 78 times [2018-07-23 15:25:45,825 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1560 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:45,970 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:45,970 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-07-23 15:25:45,970 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 15:25:45,971 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 15:25:45,971 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=906, Invalid=986, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:25:45,971 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 44 states. [2018-07-23 15:25:46,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:46,277 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-07-23 15:25:46,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 15:25:46,277 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 164 [2018-07-23 15:25:46,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:46,278 INFO L225 Difference]: With dead ends: 169 [2018-07-23 15:25:46,278 INFO L226 Difference]: Without dead ends: 167 [2018-07-23 15:25:46,279 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:25:46,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-07-23 15:25:46,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-07-23 15:25:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-07-23 15:25:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-07-23 15:25:46,425 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-07-23 15:25:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:46,426 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-07-23 15:25:46,426 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 15:25:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-07-23 15:25:46,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-07-23 15:25:46,427 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:46,427 INFO L353 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-07-23 15:25:46,427 INFO L414 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:46,427 INFO L82 PathProgramCache]: Analyzing trace with hash 334812651, now seen corresponding path program 79 times [2018-07-23 15:25:46,428 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 3280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:47,008 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:47,008 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-07-23 15:25:47,008 INFO L450 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-23 15:25:47,009 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-23 15:25:47,009 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:25:47,009 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 84 states. [2018-07-23 15:25:48,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:48,268 INFO L93 Difference]: Finished difference Result 253 states and 255 transitions. [2018-07-23 15:25:48,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 15:25:48,268 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-07-23 15:25:48,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:48,269 INFO L225 Difference]: With dead ends: 253 [2018-07-23 15:25:48,269 INFO L226 Difference]: Without dead ends: 169 [2018-07-23 15:25:48,270 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=420, Invalid=15582, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:25:48,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-07-23 15:25:48,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-07-23 15:25:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-07-23 15:25:48,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-07-23 15:25:48,409 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2018-07-23 15:25:48,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:48,410 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-07-23 15:25:48,410 INFO L472 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-23 15:25:48,410 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-07-23 15:25:48,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-07-23 15:25:48,411 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:48,411 INFO L353 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-07-23 15:25:48,411 INFO L414 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:48,411 INFO L82 PathProgramCache]: Analyzing trace with hash -436388571, now seen corresponding path program 80 times [2018-07-23 15:25:48,411 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1640 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:48,563 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:48,563 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-07-23 15:25:48,563 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 15:25:48,564 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 15:25:48,564 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1031, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:25:48,564 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 45 states. [2018-07-23 15:25:48,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:48,791 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-07-23 15:25:48,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 15:25:48,791 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 168 [2018-07-23 15:25:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:48,792 INFO L225 Difference]: With dead ends: 173 [2018-07-23 15:25:48,792 INFO L226 Difference]: Without dead ends: 171 [2018-07-23 15:25:48,793 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:25:48,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-07-23 15:25:48,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-07-23 15:25:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-07-23 15:25:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-07-23 15:25:48,930 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-07-23 15:25:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:48,930 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-07-23 15:25:48,931 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 15:25:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-07-23 15:25:48,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-07-23 15:25:48,931 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:48,931 INFO L353 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-07-23 15:25:48,931 INFO L414 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:48,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1537430623, now seen corresponding path program 81 times [2018-07-23 15:25:48,932 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 3444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:49,296 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:49,296 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-07-23 15:25:49,297 INFO L450 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-23 15:25:49,297 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-23 15:25:49,297 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:25:49,297 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 86 states. [2018-07-23 15:25:50,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:50,667 INFO L93 Difference]: Finished difference Result 259 states and 261 transitions. [2018-07-23 15:25:50,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 15:25:50,667 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-07-23 15:25:50,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:50,668 INFO L225 Difference]: With dead ends: 259 [2018-07-23 15:25:50,668 INFO L226 Difference]: Without dead ends: 173 [2018-07-23 15:25:50,669 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=430, Invalid=16340, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:25:50,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-07-23 15:25:50,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-07-23 15:25:50,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-07-23 15:25:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-07-23 15:25:50,818 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-07-23 15:25:50,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:50,818 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-07-23 15:25:50,818 INFO L472 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-23 15:25:50,818 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-07-23 15:25:50,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-07-23 15:25:50,819 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:50,819 INFO L353 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-07-23 15:25:50,819 INFO L414 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:50,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1739485543, now seen corresponding path program 82 times [2018-07-23 15:25:50,820 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1722 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:50,930 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:50,931 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-07-23 15:25:50,931 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 15:25:50,931 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 15:25:50,931 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=993, Invalid=1077, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:25:50,932 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 46 states. [2018-07-23 15:25:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:51,220 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-07-23 15:25:51,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 15:25:51,220 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 172 [2018-07-23 15:25:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:51,221 INFO L225 Difference]: With dead ends: 177 [2018-07-23 15:25:51,221 INFO L226 Difference]: Without dead ends: 175 [2018-07-23 15:25:51,221 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:25:51,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-07-23 15:25:51,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-07-23 15:25:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-07-23 15:25:51,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-07-23 15:25:51,365 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2018-07-23 15:25:51,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:51,365 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-07-23 15:25:51,365 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 15:25:51,365 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-07-23 15:25:51,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-07-23 15:25:51,366 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:51,366 INFO L353 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-07-23 15:25:51,366 INFO L414 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:51,366 INFO L82 PathProgramCache]: Analyzing trace with hash -903276333, now seen corresponding path program 83 times [2018-07-23 15:25:51,366 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 3612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:51,786 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:51,786 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-07-23 15:25:51,787 INFO L450 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-23 15:25:51,787 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-23 15:25:51,788 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:25:51,788 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 88 states. [2018-07-23 15:25:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:53,371 INFO L93 Difference]: Finished difference Result 265 states and 267 transitions. [2018-07-23 15:25:53,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 15:25:53,371 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-07-23 15:25:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:53,372 INFO L225 Difference]: With dead ends: 265 [2018-07-23 15:25:53,372 INFO L226 Difference]: Without dead ends: 177 [2018-07-23 15:25:53,375 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=440, Invalid=17116, Unknown=0, NotChecked=0, Total=17556 [2018-07-23 15:25:53,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-07-23 15:25:53,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-07-23 15:25:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-07-23 15:25:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-07-23 15:25:53,536 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2018-07-23 15:25:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:53,536 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-07-23 15:25:53,536 INFO L472 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-23 15:25:53,536 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-07-23 15:25:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-07-23 15:25:53,537 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:53,537 INFO L353 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-07-23 15:25:53,537 INFO L414 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:53,538 INFO L82 PathProgramCache]: Analyzing trace with hash 878421517, now seen corresponding path program 84 times [2018-07-23 15:25:53,538 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1806 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:53,663 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:53,663 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-07-23 15:25:53,664 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 15:25:53,664 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 15:25:53,664 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1038, Invalid=1124, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:25:53,665 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 47 states. [2018-07-23 15:25:54,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:54,021 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-07-23 15:25:54,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 15:25:54,021 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 176 [2018-07-23 15:25:54,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:54,023 INFO L225 Difference]: With dead ends: 181 [2018-07-23 15:25:54,023 INFO L226 Difference]: Without dead ends: 179 [2018-07-23 15:25:54,023 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:25:54,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-07-23 15:25:54,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-07-23 15:25:54,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-07-23 15:25:54,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-07-23 15:25:54,225 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-07-23 15:25:54,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:54,226 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-07-23 15:25:54,226 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 15:25:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-07-23 15:25:54,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-07-23 15:25:54,227 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:54,227 INFO L353 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-07-23 15:25:54,227 INFO L414 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:54,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1945427129, now seen corresponding path program 85 times [2018-07-23 15:25:54,228 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 3784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:54,716 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:54,716 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-07-23 15:25:54,717 INFO L450 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-23 15:25:54,717 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-23 15:25:54,718 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:25:54,718 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 90 states. [2018-07-23 15:25:56,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:56,140 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-07-23 15:25:56,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 15:25:56,140 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-07-23 15:25:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:56,141 INFO L225 Difference]: With dead ends: 271 [2018-07-23 15:25:56,141 INFO L226 Difference]: Without dead ends: 181 [2018-07-23 15:25:56,143 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=450, Invalid=17910, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:25:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-07-23 15:25:56,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-07-23 15:25:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-07-23 15:25:56,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-07-23 15:25:56,316 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-07-23 15:25:56,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:56,316 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-07-23 15:25:56,316 INFO L472 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-23 15:25:56,316 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-07-23 15:25:56,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-07-23 15:25:56,317 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:56,317 INFO L353 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-07-23 15:25:56,317 INFO L414 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:56,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1398834049, now seen corresponding path program 86 times [2018-07-23 15:25:56,318 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1892 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:56,482 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:56,482 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-07-23 15:25:56,483 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 15:25:56,483 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 15:25:56,483 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1084, Invalid=1172, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:25:56,484 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 48 states. [2018-07-23 15:25:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:56,861 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2018-07-23 15:25:56,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 15:25:56,861 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 180 [2018-07-23 15:25:56,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:56,862 INFO L225 Difference]: With dead ends: 185 [2018-07-23 15:25:56,862 INFO L226 Difference]: Without dead ends: 183 [2018-07-23 15:25:56,863 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1935 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:25:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-07-23 15:25:57,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-07-23 15:25:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-07-23 15:25:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-07-23 15:25:57,019 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2018-07-23 15:25:57,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:57,019 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-07-23 15:25:57,019 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 15:25:57,019 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-07-23 15:25:57,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-07-23 15:25:57,020 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:57,020 INFO L353 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-07-23 15:25:57,021 INFO L414 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:57,021 INFO L82 PathProgramCache]: Analyzing trace with hash -45190213, now seen corresponding path program 87 times [2018-07-23 15:25:57,021 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 3960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:57,466 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:57,466 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-07-23 15:25:57,467 INFO L450 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-23 15:25:57,467 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-23 15:25:57,467 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:25:57,468 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 92 states. [2018-07-23 15:25:59,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:59,013 INFO L93 Difference]: Finished difference Result 277 states and 279 transitions. [2018-07-23 15:25:59,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 15:25:59,013 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-07-23 15:25:59,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:59,014 INFO L225 Difference]: With dead ends: 277 [2018-07-23 15:25:59,015 INFO L226 Difference]: Without dead ends: 185 [2018-07-23 15:25:59,016 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=460, Invalid=18722, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 15:25:59,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-07-23 15:25:59,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-07-23 15:25:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-07-23 15:25:59,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-07-23 15:25:59,180 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2018-07-23 15:25:59,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:59,180 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-07-23 15:25:59,180 INFO L472 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-23 15:25:59,180 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-07-23 15:25:59,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-07-23 15:25:59,181 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:59,181 INFO L353 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-07-23 15:25:59,181 INFO L414 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:59,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1579493109, now seen corresponding path program 88 times [2018-07-23 15:25:59,181 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 1980 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:59,289 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:59,289 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-07-23 15:25:59,289 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 15:25:59,289 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 15:25:59,289 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=1221, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:25:59,290 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 49 states. [2018-07-23 15:25:59,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:59,561 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2018-07-23 15:25:59,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 15:25:59,561 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 184 [2018-07-23 15:25:59,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:59,562 INFO L225 Difference]: With dead ends: 189 [2018-07-23 15:25:59,562 INFO L226 Difference]: Without dead ends: 187 [2018-07-23 15:25:59,563 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2024 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:25:59,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-07-23 15:25:59,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-07-23 15:25:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-07-23 15:25:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-07-23 15:25:59,869 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-07-23 15:25:59,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:59,869 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-07-23 15:25:59,869 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 15:25:59,869 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-07-23 15:25:59,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-07-23 15:25:59,870 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:59,870 INFO L353 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-07-23 15:25:59,871 INFO L414 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:59,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1769474607, now seen corresponding path program 89 times [2018-07-23 15:25:59,871 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 4140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:00,438 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:00,438 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-07-23 15:26:00,439 INFO L450 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-23 15:26:00,439 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-23 15:26:00,439 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:26:00,440 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 94 states. [2018-07-23 15:26:02,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:02,204 INFO L93 Difference]: Finished difference Result 283 states and 285 transitions. [2018-07-23 15:26:02,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-23 15:26:02,204 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-07-23 15:26:02,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:02,205 INFO L225 Difference]: With dead ends: 283 [2018-07-23 15:26:02,205 INFO L226 Difference]: Without dead ends: 189 [2018-07-23 15:26:02,206 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=470, Invalid=19552, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:26:02,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-07-23 15:26:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-07-23 15:26:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-07-23 15:26:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-07-23 15:26:02,379 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-07-23 15:26:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:02,379 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-07-23 15:26:02,379 INFO L472 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-23 15:26:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-07-23 15:26:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-07-23 15:26:02,380 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:02,380 INFO L353 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-07-23 15:26:02,380 INFO L414 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:02,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1290702953, now seen corresponding path program 90 times [2018-07-23 15:26:02,380 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2070 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:02,492 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:02,492 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-07-23 15:26:02,492 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 15:26:02,493 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 15:26:02,493 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:26:02,493 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 50 states. [2018-07-23 15:26:02,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:02,754 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-07-23 15:26:02,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-23 15:26:02,754 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 188 [2018-07-23 15:26:02,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:02,755 INFO L225 Difference]: With dead ends: 193 [2018-07-23 15:26:02,755 INFO L226 Difference]: Without dead ends: 191 [2018-07-23 15:26:02,756 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:26:02,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-07-23 15:26:02,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-07-23 15:26:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-07-23 15:26:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-07-23 15:26:02,933 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2018-07-23 15:26:02,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:02,933 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-07-23 15:26:02,933 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 15:26:02,934 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-07-23 15:26:02,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-07-23 15:26:02,934 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:02,935 INFO L353 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-07-23 15:26:02,935 INFO L414 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:02,935 INFO L82 PathProgramCache]: Analyzing trace with hash -879958365, now seen corresponding path program 91 times [2018-07-23 15:26:02,935 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 4324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:03,420 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:03,420 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-07-23 15:26:03,420 INFO L450 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-23 15:26:03,420 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-23 15:26:03,421 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:26:03,421 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 96 states. [2018-07-23 15:26:05,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:05,153 INFO L93 Difference]: Finished difference Result 289 states and 291 transitions. [2018-07-23 15:26:05,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-23 15:26:05,153 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-07-23 15:26:05,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:05,154 INFO L225 Difference]: With dead ends: 289 [2018-07-23 15:26:05,155 INFO L226 Difference]: Without dead ends: 193 [2018-07-23 15:26:05,156 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=480, Invalid=20400, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 15:26:05,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-07-23 15:26:05,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-07-23 15:26:05,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-07-23 15:26:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-07-23 15:26:05,360 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2018-07-23 15:26:05,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:05,361 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-07-23 15:26:05,361 INFO L472 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-23 15:26:05,361 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-07-23 15:26:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-07-23 15:26:05,385 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:05,385 INFO L353 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-07-23 15:26:05,385 INFO L414 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:05,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1736556509, now seen corresponding path program 92 times [2018-07-23 15:26:05,386 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2162 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:05,540 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:05,540 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-07-23 15:26:05,540 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 15:26:05,541 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 15:26:05,541 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=1322, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:26:05,541 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 51 states. [2018-07-23 15:26:05,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:05,819 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2018-07-23 15:26:05,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-23 15:26:05,819 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 192 [2018-07-23 15:26:05,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:05,820 INFO L225 Difference]: With dead ends: 197 [2018-07-23 15:26:05,820 INFO L226 Difference]: Without dead ends: 195 [2018-07-23 15:26:05,821 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2208 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:26:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-07-23 15:26:06,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-07-23 15:26:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-07-23 15:26:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-07-23 15:26:06,006 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-07-23 15:26:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:06,006 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-07-23 15:26:06,006 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 15:26:06,006 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-07-23 15:26:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-07-23 15:26:06,007 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:06,007 INFO L353 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-07-23 15:26:06,007 INFO L414 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:06,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1911420649, now seen corresponding path program 93 times [2018-07-23 15:26:06,007 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 4512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:06,490 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:06,490 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-07-23 15:26:06,490 INFO L450 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-07-23 15:26:06,491 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-07-23 15:26:06,491 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:26:06,492 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 98 states. [2018-07-23 15:26:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:08,246 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2018-07-23 15:26:08,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-23 15:26:08,246 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-07-23 15:26:08,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:08,247 INFO L225 Difference]: With dead ends: 295 [2018-07-23 15:26:08,247 INFO L226 Difference]: Without dead ends: 197 [2018-07-23 15:26:08,249 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=490, Invalid=21266, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:26:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-07-23 15:26:08,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-07-23 15:26:08,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-07-23 15:26:08,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-07-23 15:26:08,444 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-07-23 15:26:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:08,444 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-07-23 15:26:08,444 INFO L472 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-07-23 15:26:08,444 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-07-23 15:26:08,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-07-23 15:26:08,445 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:08,446 INFO L353 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-07-23 15:26:08,446 INFO L414 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:08,446 INFO L82 PathProgramCache]: Analyzing trace with hash 86226257, now seen corresponding path program 94 times [2018-07-23 15:26:08,446 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2256 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:08,600 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:08,600 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-07-23 15:26:08,601 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 15:26:08,601 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 15:26:08,601 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1278, Invalid=1374, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:26:08,601 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 52 states. [2018-07-23 15:26:08,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:08,904 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2018-07-23 15:26:08,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-23 15:26:08,904 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 196 [2018-07-23 15:26:08,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:08,905 INFO L225 Difference]: With dead ends: 201 [2018-07-23 15:26:08,905 INFO L226 Difference]: Without dead ends: 199 [2018-07-23 15:26:08,906 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2303 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:26:08,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-07-23 15:26:09,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-07-23 15:26:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-07-23 15:26:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-07-23 15:26:09,154 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2018-07-23 15:26:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:09,155 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-07-23 15:26:09,155 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 15:26:09,155 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-07-23 15:26:09,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-07-23 15:26:09,156 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:09,156 INFO L353 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2018-07-23 15:26:09,156 INFO L414 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:09,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1259106699, now seen corresponding path program 95 times [2018-07-23 15:26:09,157 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 4704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:09,713 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:09,713 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-07-23 15:26:09,714 INFO L450 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-07-23 15:26:09,714 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-07-23 15:26:09,714 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:26:09,714 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 100 states. [2018-07-23 15:26:11,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:11,534 INFO L93 Difference]: Finished difference Result 301 states and 303 transitions. [2018-07-23 15:26:11,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-23 15:26:11,534 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-07-23 15:26:11,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:11,535 INFO L225 Difference]: With dead ends: 301 [2018-07-23 15:26:11,535 INFO L226 Difference]: Without dead ends: 201 [2018-07-23 15:26:11,536 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=500, Invalid=22150, Unknown=0, NotChecked=0, Total=22650 [2018-07-23 15:26:11,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-07-23 15:26:11,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-07-23 15:26:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-07-23 15:26:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-07-23 15:26:11,727 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2018-07-23 15:26:11,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:11,727 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-07-23 15:26:11,727 INFO L472 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-07-23 15:26:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-07-23 15:26:11,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-07-23 15:26:11,728 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:11,728 INFO L353 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-07-23 15:26:11,728 INFO L414 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:11,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1285124293, now seen corresponding path program 96 times [2018-07-23 15:26:11,728 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2352 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:11,856 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:11,856 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-07-23 15:26:11,856 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 15:26:11,857 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 15:26:11,857 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1329, Invalid=1427, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:26:11,857 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 53 states. [2018-07-23 15:26:12,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:12,161 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-07-23 15:26:12,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-23 15:26:12,162 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 200 [2018-07-23 15:26:12,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:12,163 INFO L225 Difference]: With dead ends: 205 [2018-07-23 15:26:12,163 INFO L226 Difference]: Without dead ends: 203 [2018-07-23 15:26:12,163 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2400 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:26:12,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-07-23 15:26:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-07-23 15:26:12,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-07-23 15:26:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-07-23 15:26:12,374 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-07-23 15:26:12,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:12,375 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-07-23 15:26:12,375 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 15:26:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-07-23 15:26:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-07-23 15:26:12,376 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:12,376 INFO L353 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-07-23 15:26:12,376 INFO L414 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:12,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1946083329, now seen corresponding path program 97 times [2018-07-23 15:26:12,376 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:12,923 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:12,923 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2018-07-23 15:26:12,923 INFO L450 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-07-23 15:26:12,923 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-07-23 15:26:12,924 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=10101, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:26:12,924 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 102 states. [2018-07-23 15:26:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:14,710 INFO L93 Difference]: Finished difference Result 307 states and 309 transitions. [2018-07-23 15:26:14,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-07-23 15:26:14,710 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-07-23 15:26:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:14,711 INFO L225 Difference]: With dead ends: 307 [2018-07-23 15:26:14,712 INFO L226 Difference]: Without dead ends: 205 [2018-07-23 15:26:14,713 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=510, Invalid=23052, Unknown=0, NotChecked=0, Total=23562 [2018-07-23 15:26:14,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-07-23 15:26:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-07-23 15:26:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-07-23 15:26:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2018-07-23 15:26:14,912 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2018-07-23 15:26:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:14,912 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2018-07-23 15:26:14,912 INFO L472 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-07-23 15:26:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2018-07-23 15:26:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-07-23 15:26:14,913 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:14,914 INFO L353 BasicCegarLoop]: trace histogram [51, 50, 50, 49, 1, 1, 1, 1] [2018-07-23 15:26:14,914 INFO L414 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:14,914 INFO L82 PathProgramCache]: Analyzing trace with hash -198708679, now seen corresponding path program 98 times [2018-07-23 15:26:14,914 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2450 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:15,057 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:15,057 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-07-23 15:26:15,058 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 15:26:15,058 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 15:26:15,058 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:26:15,058 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 54 states. [2018-07-23 15:26:15,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:15,398 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2018-07-23 15:26:15,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-07-23 15:26:15,398 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 204 [2018-07-23 15:26:15,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:15,399 INFO L225 Difference]: With dead ends: 209 [2018-07-23 15:26:15,399 INFO L226 Difference]: Without dead ends: 207 [2018-07-23 15:26:15,400 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2499 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:26:15,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-07-23 15:26:15,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-07-23 15:26:15,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-07-23 15:26:15,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-07-23 15:26:15,611 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 204 [2018-07-23 15:26:15,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:15,611 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-07-23 15:26:15,611 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 15:26:15,611 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-07-23 15:26:15,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-07-23 15:26:15,612 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:15,612 INFO L353 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1] [2018-07-23 15:26:15,612 INFO L414 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:15,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1980427149, now seen corresponding path program 99 times [2018-07-23 15:26:15,613 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 5100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:16,185 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:16,185 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2018-07-23 15:26:16,186 INFO L450 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-07-23 15:26:16,186 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-07-23 15:26:16,186 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=10507, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:26:16,187 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 104 states. [2018-07-23 15:26:18,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:18,180 INFO L93 Difference]: Finished difference Result 313 states and 315 transitions. [2018-07-23 15:26:18,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-07-23 15:26:18,180 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-07-23 15:26:18,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:18,181 INFO L225 Difference]: With dead ends: 313 [2018-07-23 15:26:18,181 INFO L226 Difference]: Without dead ends: 209 [2018-07-23 15:26:18,183 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=520, Invalid=23972, Unknown=0, NotChecked=0, Total=24492 [2018-07-23 15:26:18,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-07-23 15:26:18,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-07-23 15:26:18,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-07-23 15:26:18,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2018-07-23 15:26:18,400 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 206 [2018-07-23 15:26:18,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:18,400 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2018-07-23 15:26:18,400 INFO L472 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-07-23 15:26:18,400 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2018-07-23 15:26:18,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-07-23 15:26:18,401 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:18,401 INFO L353 BasicCegarLoop]: trace histogram [52, 51, 51, 50, 1, 1, 1, 1] [2018-07-23 15:26:18,401 INFO L414 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:18,401 INFO L82 PathProgramCache]: Analyzing trace with hash 26491309, now seen corresponding path program 100 times [2018-07-23 15:26:18,401 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 2550 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:18,542 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:18,542 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-07-23 15:26:18,542 INFO L450 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-23 15:26:18,543 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-23 15:26:18,543 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1434, Invalid=1536, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:26:18,543 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand 55 states. [2018-07-23 15:26:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:18,875 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2018-07-23 15:26:18,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-07-23 15:26:18,875 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 208 [2018-07-23 15:26:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:18,876 INFO L225 Difference]: With dead ends: 213 [2018-07-23 15:26:18,877 INFO L226 Difference]: Without dead ends: 211 [2018-07-23 15:26:18,878 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2600 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:26:18,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-07-23 15:26:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-07-23 15:26:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-07-23 15:26:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2018-07-23 15:26:19,102 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 208 [2018-07-23 15:26:19,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:19,103 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2018-07-23 15:26:19,103 INFO L472 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-23 15:26:19,103 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2018-07-23 15:26:19,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-07-23 15:26:19,104 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:19,104 INFO L353 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1] [2018-07-23 15:26:19,104 INFO L414 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:19,105 INFO L82 PathProgramCache]: Analyzing trace with hash -311603481, now seen corresponding path program 101 times [2018-07-23 15:26:19,105 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 5304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:19,718 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:19,718 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2018-07-23 15:26:19,719 INFO L450 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-07-23 15:26:19,719 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-07-23 15:26:19,719 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=10921, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:26:19,720 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 106 states. [2018-07-23 15:26:21,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:21,736 INFO L93 Difference]: Finished difference Result 319 states and 321 transitions. [2018-07-23 15:26:21,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-07-23 15:26:21,736 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-07-23 15:26:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:21,737 INFO L225 Difference]: With dead ends: 319 [2018-07-23 15:26:21,737 INFO L226 Difference]: Without dead ends: 213 [2018-07-23 15:26:21,739 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=530, Invalid=24910, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:26:21,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-07-23 15:26:22,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-07-23 15:26:22,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-07-23 15:26:22,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2018-07-23 15:26:22,016 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 210 [2018-07-23 15:26:22,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:22,016 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2018-07-23 15:26:22,016 INFO L472 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-07-23 15:26:22,016 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2018-07-23 15:26:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-07-23 15:26:22,017 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:22,018 INFO L353 BasicCegarLoop]: trace histogram [53, 52, 52, 51, 1, 1, 1, 1] [2018-07-23 15:26:22,018 INFO L414 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:22,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1977399519, now seen corresponding path program 102 times [2018-07-23 15:26:22,018 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 2652 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:22,185 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:22,185 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-07-23 15:26:22,186 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 15:26:22,186 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 15:26:22,186 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1488, Invalid=1592, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:26:22,187 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand 56 states. [2018-07-23 15:26:22,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:22,535 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2018-07-23 15:26:22,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-07-23 15:26:22,535 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 212 [2018-07-23 15:26:22,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:22,536 INFO L225 Difference]: With dead ends: 217 [2018-07-23 15:26:22,536 INFO L226 Difference]: Without dead ends: 215 [2018-07-23 15:26:22,538 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2703 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:26:22,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-07-23 15:26:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-07-23 15:26:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-07-23 15:26:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2018-07-23 15:26:22,786 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 212 [2018-07-23 15:26:22,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:22,786 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2018-07-23 15:26:22,786 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 15:26:22,787 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2018-07-23 15:26:22,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-07-23 15:26:22,787 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:22,787 INFO L353 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1, 1, 1] [2018-07-23 15:26:22,787 INFO L414 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:22,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1905340581, now seen corresponding path program 103 times [2018-07-23 15:26:22,788 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 5512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:23,346 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:23,346 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2018-07-23 15:26:23,347 INFO L450 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-07-23 15:26:23,347 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-07-23 15:26:23,348 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=11343, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:26:23,348 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand 108 states. [2018-07-23 15:26:25,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:25,469 INFO L93 Difference]: Finished difference Result 325 states and 327 transitions. [2018-07-23 15:26:25,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-23 15:26:25,469 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-07-23 15:26:25,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:25,470 INFO L225 Difference]: With dead ends: 325 [2018-07-23 15:26:25,470 INFO L226 Difference]: Without dead ends: 217 [2018-07-23 15:26:25,472 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=540, Invalid=25866, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:26:25,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-07-23 15:26:25,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-07-23 15:26:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-07-23 15:26:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2018-07-23 15:26:25,730 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 214 [2018-07-23 15:26:25,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:25,730 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2018-07-23 15:26:25,731 INFO L472 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-07-23 15:26:25,731 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2018-07-23 15:26:25,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-07-23 15:26:25,732 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:25,732 INFO L353 BasicCegarLoop]: trace histogram [54, 53, 53, 52, 1, 1, 1, 1] [2018-07-23 15:26:25,732 INFO L414 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:25,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1922701973, now seen corresponding path program 104 times [2018-07-23 15:26:25,732 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5618 backedges. 2756 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:25,874 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:25,874 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-07-23 15:26:25,874 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 15:26:25,875 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 15:26:25,875 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1543, Invalid=1649, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:26:25,875 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 57 states. [2018-07-23 15:26:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:26,235 INFO L93 Difference]: Finished difference Result 221 states and 222 transitions. [2018-07-23 15:26:26,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-23 15:26:26,236 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 216 [2018-07-23 15:26:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:26,236 INFO L225 Difference]: With dead ends: 221 [2018-07-23 15:26:26,236 INFO L226 Difference]: Without dead ends: 219 [2018-07-23 15:26:26,237 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2808 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:26:26,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-07-23 15:26:26,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-07-23 15:26:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-07-23 15:26:26,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2018-07-23 15:26:26,468 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 216 [2018-07-23 15:26:26,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:26,468 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2018-07-23 15:26:26,468 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 15:26:26,468 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2018-07-23 15:26:26,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-07-23 15:26:26,469 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:26,469 INFO L353 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1] [2018-07-23 15:26:26,469 INFO L414 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:26,469 INFO L82 PathProgramCache]: Analyzing trace with hash 880711119, now seen corresponding path program 105 times [2018-07-23 15:26:26,469 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 5724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:27,063 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:27,063 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2018-07-23 15:26:27,064 INFO L450 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-07-23 15:26:27,064 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-07-23 15:26:27,064 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=11773, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:26:27,065 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 110 states. [2018-07-23 15:26:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:29,352 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2018-07-23 15:26:29,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-07-23 15:26:29,352 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-07-23 15:26:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:29,353 INFO L225 Difference]: With dead ends: 331 [2018-07-23 15:26:29,353 INFO L226 Difference]: Without dead ends: 221 [2018-07-23 15:26:29,355 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=550, Invalid=26840, Unknown=0, NotChecked=0, Total=27390 [2018-07-23 15:26:29,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-07-23 15:26:29,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-07-23 15:26:29,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-07-23 15:26:29,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2018-07-23 15:26:29,610 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 218 [2018-07-23 15:26:29,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:29,611 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2018-07-23 15:26:29,611 INFO L472 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-07-23 15:26:29,611 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2018-07-23 15:26:29,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-07-23 15:26:29,612 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:29,612 INFO L353 BasicCegarLoop]: trace histogram [55, 54, 54, 53, 1, 1, 1, 1] [2018-07-23 15:26:29,612 INFO L414 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:29,612 INFO L82 PathProgramCache]: Analyzing trace with hash 792572937, now seen corresponding path program 106 times [2018-07-23 15:26:29,612 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5832 backedges. 2862 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:29,825 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:29,825 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-07-23 15:26:29,825 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 15:26:29,826 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 15:26:29,826 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1599, Invalid=1707, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:26:29,826 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand 58 states. [2018-07-23 15:26:30,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:30,185 INFO L93 Difference]: Finished difference Result 225 states and 226 transitions. [2018-07-23 15:26:30,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-07-23 15:26:30,185 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 220 [2018-07-23 15:26:30,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:30,185 INFO L225 Difference]: With dead ends: 225 [2018-07-23 15:26:30,185 INFO L226 Difference]: Without dead ends: 223 [2018-07-23 15:26:30,186 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2915 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:26:30,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-07-23 15:26:30,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-07-23 15:26:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-07-23 15:26:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2018-07-23 15:26:30,419 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 220 [2018-07-23 15:26:30,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:30,419 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2018-07-23 15:26:30,419 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 15:26:30,419 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2018-07-23 15:26:30,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-07-23 15:26:30,420 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:30,420 INFO L353 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1, 1, 1] [2018-07-23 15:26:30,420 INFO L414 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:30,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1453433411, now seen corresponding path program 107 times [2018-07-23 15:26:30,421 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 5940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:31,236 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:31,236 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2018-07-23 15:26:31,236 INFO L450 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-07-23 15:26:31,236 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-07-23 15:26:31,237 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=12211, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:26:31,237 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand 112 states. [2018-07-23 15:26:33,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:33,561 INFO L93 Difference]: Finished difference Result 337 states and 339 transitions. [2018-07-23 15:26:33,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-07-23 15:26:33,562 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 222 [2018-07-23 15:26:33,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:33,562 INFO L225 Difference]: With dead ends: 337 [2018-07-23 15:26:33,562 INFO L226 Difference]: Without dead ends: 225 [2018-07-23 15:26:33,564 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=560, Invalid=27832, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:26:33,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-07-23 15:26:33,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-07-23 15:26:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-07-23 15:26:33,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2018-07-23 15:26:33,810 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 222 [2018-07-23 15:26:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:33,810 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2018-07-23 15:26:33,810 INFO L472 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-07-23 15:26:33,811 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2018-07-23 15:26:33,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-07-23 15:26:33,811 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:33,811 INFO L353 BasicCegarLoop]: trace histogram [56, 55, 55, 54, 1, 1, 1, 1] [2018-07-23 15:26:33,811 INFO L414 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:33,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2083318915, now seen corresponding path program 108 times [2018-07-23 15:26:33,812 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 2970 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:33,969 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:33,969 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-07-23 15:26:33,969 INFO L450 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-23 15:26:33,970 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-23 15:26:33,970 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1656, Invalid=1766, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:26:33,970 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand 59 states. [2018-07-23 15:26:34,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:34,369 INFO L93 Difference]: Finished difference Result 229 states and 230 transitions. [2018-07-23 15:26:34,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-07-23 15:26:34,370 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 224 [2018-07-23 15:26:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:34,370 INFO L225 Difference]: With dead ends: 229 [2018-07-23 15:26:34,370 INFO L226 Difference]: Without dead ends: 227 [2018-07-23 15:26:34,371 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3024 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:26:34,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-07-23 15:26:34,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-07-23 15:26:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-07-23 15:26:34,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2018-07-23 15:26:34,614 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 224 [2018-07-23 15:26:34,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:34,614 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2018-07-23 15:26:34,615 INFO L472 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-23 15:26:34,615 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2018-07-23 15:26:34,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-07-23 15:26:34,615 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:34,615 INFO L353 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1] [2018-07-23 15:26:34,615 INFO L414 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:34,616 INFO L82 PathProgramCache]: Analyzing trace with hash -614665033, now seen corresponding path program 109 times [2018-07-23 15:26:34,616 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 6160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:35,214 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:35,215 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2018-07-23 15:26:35,215 INFO L450 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-07-23 15:26:35,215 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-07-23 15:26:35,216 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=12657, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:26:35,216 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 114 states. [2018-07-23 15:26:37,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:37,758 INFO L93 Difference]: Finished difference Result 343 states and 345 transitions. [2018-07-23 15:26:37,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-07-23 15:26:37,758 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 226 [2018-07-23 15:26:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:37,759 INFO L225 Difference]: With dead ends: 343 [2018-07-23 15:26:37,759 INFO L226 Difference]: Without dead ends: 229 [2018-07-23 15:26:37,761 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=570, Invalid=28842, Unknown=0, NotChecked=0, Total=29412 [2018-07-23 15:26:37,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-07-23 15:26:38,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-07-23 15:26:38,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-07-23 15:26:38,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2018-07-23 15:26:38,023 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 226 [2018-07-23 15:26:38,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:38,024 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2018-07-23 15:26:38,024 INFO L472 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-07-23 15:26:38,024 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2018-07-23 15:26:38,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-07-23 15:26:38,024 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:38,024 INFO L353 BasicCegarLoop]: trace histogram [57, 56, 56, 55, 1, 1, 1, 1] [2018-07-23 15:26:38,025 INFO L414 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:38,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1134508273, now seen corresponding path program 110 times [2018-07-23 15:26:38,025 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6272 backedges. 3080 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:38,188 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:38,189 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-07-23 15:26:38,189 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-23 15:26:38,189 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-23 15:26:38,189 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1714, Invalid=1826, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:26:38,190 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand 60 states. [2018-07-23 15:26:38,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:38,648 INFO L93 Difference]: Finished difference Result 233 states and 234 transitions. [2018-07-23 15:26:38,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-07-23 15:26:38,648 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 228 [2018-07-23 15:26:38,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:38,649 INFO L225 Difference]: With dead ends: 233 [2018-07-23 15:26:38,649 INFO L226 Difference]: Without dead ends: 231 [2018-07-23 15:26:38,650 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:26:38,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-07-23 15:26:39,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-07-23 15:26:39,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-07-23 15:26:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2018-07-23 15:26:39,113 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 228 [2018-07-23 15:26:39,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:39,113 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2018-07-23 15:26:39,113 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-23 15:26:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2018-07-23 15:26:39,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-07-23 15:26:39,114 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:39,114 INFO L353 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1, 1, 1] [2018-07-23 15:26:39,114 INFO L414 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:39,115 INFO L82 PathProgramCache]: Analyzing trace with hash -659190485, now seen corresponding path program 111 times [2018-07-23 15:26:39,115 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 6384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:39,754 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:39,754 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115] total 115 [2018-07-23 15:26:39,755 INFO L450 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-07-23 15:26:39,755 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-07-23 15:26:39,756 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=13111, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:26:39,756 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 116 states. [2018-07-23 15:26:42,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:42,126 INFO L93 Difference]: Finished difference Result 349 states and 351 transitions. [2018-07-23 15:26:42,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-07-23 15:26:42,126 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 230 [2018-07-23 15:26:42,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:42,127 INFO L225 Difference]: With dead ends: 349 [2018-07-23 15:26:42,127 INFO L226 Difference]: Without dead ends: 233 [2018-07-23 15:26:42,128 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=580, Invalid=29870, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:26:42,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-07-23 15:26:42,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-07-23 15:26:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-07-23 15:26:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2018-07-23 15:26:42,386 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 230 [2018-07-23 15:26:42,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:42,387 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2018-07-23 15:26:42,387 INFO L472 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-07-23 15:26:42,387 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2018-07-23 15:26:42,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-07-23 15:26:42,388 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:42,388 INFO L353 BasicCegarLoop]: trace histogram [58, 57, 57, 56, 1, 1, 1, 1] [2018-07-23 15:26:42,388 INFO L414 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:42,388 INFO L82 PathProgramCache]: Analyzing trace with hash 291972197, now seen corresponding path program 112 times [2018-07-23 15:26:42,388 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 3192 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:42,570 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:42,570 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-07-23 15:26:42,570 INFO L450 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-23 15:26:42,570 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-23 15:26:42,570 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1773, Invalid=1887, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:26:42,570 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand 61 states. [2018-07-23 15:26:42,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:42,997 INFO L93 Difference]: Finished difference Result 237 states and 238 transitions. [2018-07-23 15:26:42,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-07-23 15:26:42,997 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 232 [2018-07-23 15:26:42,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:42,997 INFO L225 Difference]: With dead ends: 237 [2018-07-23 15:26:42,997 INFO L226 Difference]: Without dead ends: 235 [2018-07-23 15:26:42,998 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3248 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:26:42,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-07-23 15:26:43,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-07-23 15:26:43,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-07-23 15:26:43,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2018-07-23 15:26:43,264 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 232 [2018-07-23 15:26:43,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:43,264 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2018-07-23 15:26:43,264 INFO L472 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-23 15:26:43,264 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2018-07-23 15:26:43,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-07-23 15:26:43,265 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:43,265 INFO L353 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1] [2018-07-23 15:26:43,265 INFO L414 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:43,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1412459423, now seen corresponding path program 113 times [2018-07-23 15:26:43,265 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 6612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:43,922 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:43,923 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117] total 117 [2018-07-23 15:26:43,923 INFO L450 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-07-23 15:26:43,923 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-07-23 15:26:43,924 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=13573, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:26:43,924 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 118 states. [2018-07-23 15:26:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:46,496 INFO L93 Difference]: Finished difference Result 355 states and 357 transitions. [2018-07-23 15:26:46,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-07-23 15:26:46,496 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 234 [2018-07-23 15:26:46,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:46,497 INFO L225 Difference]: With dead ends: 355 [2018-07-23 15:26:46,497 INFO L226 Difference]: Without dead ends: 237 [2018-07-23 15:26:46,499 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1715 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=590, Invalid=30916, Unknown=0, NotChecked=0, Total=31506 [2018-07-23 15:26:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-07-23 15:26:46,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-07-23 15:26:46,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-07-23 15:26:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2018-07-23 15:26:46,768 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 234 [2018-07-23 15:26:46,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:46,768 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2018-07-23 15:26:46,768 INFO L472 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-07-23 15:26:46,768 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2018-07-23 15:26:46,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-07-23 15:26:46,769 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:46,769 INFO L353 BasicCegarLoop]: trace histogram [59, 58, 58, 57, 1, 1, 1, 1] [2018-07-23 15:26:46,769 INFO L414 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:46,769 INFO L82 PathProgramCache]: Analyzing trace with hash 527422937, now seen corresponding path program 114 times [2018-07-23 15:26:46,769 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6728 backedges. 3306 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:46,938 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:46,938 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-07-23 15:26:46,938 INFO L450 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-23 15:26:46,939 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-23 15:26:46,939 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1833, Invalid=1949, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:26:46,939 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand 62 states. [2018-07-23 15:26:47,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:47,363 INFO L93 Difference]: Finished difference Result 241 states and 242 transitions. [2018-07-23 15:26:47,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-07-23 15:26:47,363 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 236 [2018-07-23 15:26:47,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:47,364 INFO L225 Difference]: With dead ends: 241 [2018-07-23 15:26:47,364 INFO L226 Difference]: Without dead ends: 239 [2018-07-23 15:26:47,365 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3363 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:26:47,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-07-23 15:26:47,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-07-23 15:26:47,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-07-23 15:26:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2018-07-23 15:26:47,647 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 236 [2018-07-23 15:26:47,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:47,647 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2018-07-23 15:26:47,648 INFO L472 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-23 15:26:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2018-07-23 15:26:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-07-23 15:26:47,649 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:47,649 INFO L353 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1, 1, 1] [2018-07-23 15:26:47,649 INFO L414 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash 47353875, now seen corresponding path program 115 times [2018-07-23 15:26:47,649 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 6844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:48,334 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:48,334 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119] total 119 [2018-07-23 15:26:48,334 INFO L450 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-07-23 15:26:48,334 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-07-23 15:26:48,335 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=14043, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:26:48,335 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 120 states. [2018-07-23 15:26:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:50,865 INFO L93 Difference]: Finished difference Result 361 states and 363 transitions. [2018-07-23 15:26:50,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-07-23 15:26:50,865 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 238 [2018-07-23 15:26:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:50,866 INFO L225 Difference]: With dead ends: 361 [2018-07-23 15:26:50,866 INFO L226 Difference]: Without dead ends: 241 [2018-07-23 15:26:50,868 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=600, Invalid=31980, Unknown=0, NotChecked=0, Total=32580 [2018-07-23 15:26:50,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-07-23 15:26:51,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-07-23 15:26:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-07-23 15:26:51,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2018-07-23 15:26:51,152 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 238 [2018-07-23 15:26:51,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:51,153 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2018-07-23 15:26:51,153 INFO L472 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-07-23 15:26:51,153 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2018-07-23 15:26:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-07-23 15:26:51,153 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:51,153 INFO L353 BasicCegarLoop]: trace histogram [60, 59, 59, 58, 1, 1, 1, 1] [2018-07-23 15:26:51,153 INFO L414 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:51,154 INFO L82 PathProgramCache]: Analyzing trace with hash -276935347, now seen corresponding path program 116 times [2018-07-23 15:26:51,154 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6962 backedges. 3422 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:51,369 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:51,369 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-07-23 15:26:51,369 INFO L450 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-23 15:26:51,369 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-23 15:26:51,369 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1894, Invalid=2012, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:26:51,369 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand 63 states. [2018-07-23 15:26:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:51,803 INFO L93 Difference]: Finished difference Result 245 states and 246 transitions. [2018-07-23 15:26:51,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-07-23 15:26:51,803 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 240 [2018-07-23 15:26:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:51,804 INFO L225 Difference]: With dead ends: 245 [2018-07-23 15:26:51,804 INFO L226 Difference]: Without dead ends: 243 [2018-07-23 15:26:51,805 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:26:51,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-07-23 15:26:52,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-07-23 15:26:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-07-23 15:26:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2018-07-23 15:26:52,088 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 240 [2018-07-23 15:26:52,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:52,088 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2018-07-23 15:26:52,088 INFO L472 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-23 15:26:52,088 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2018-07-23 15:26:52,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-07-23 15:26:52,089 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:52,089 INFO L353 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1] [2018-07-23 15:26:52,089 INFO L414 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:52,089 INFO L82 PathProgramCache]: Analyzing trace with hash 153156231, now seen corresponding path program 117 times [2018-07-23 15:26:52,089 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 7080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:52,774 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:52,774 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121] total 121 [2018-07-23 15:26:52,775 INFO L450 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-07-23 15:26:52,775 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-07-23 15:26:52,775 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=14521, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:26:52,776 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 122 states. [2018-07-23 15:26:55,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:55,526 INFO L93 Difference]: Finished difference Result 367 states and 369 transitions. [2018-07-23 15:26:55,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-07-23 15:26:55,527 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 242 [2018-07-23 15:26:55,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:55,528 INFO L225 Difference]: With dead ends: 367 [2018-07-23 15:26:55,528 INFO L226 Difference]: Without dead ends: 245 [2018-07-23 15:26:55,530 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=610, Invalid=33062, Unknown=0, NotChecked=0, Total=33672 [2018-07-23 15:26:55,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-07-23 15:26:55,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-07-23 15:26:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-07-23 15:26:55,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2018-07-23 15:26:55,851 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 242 [2018-07-23 15:26:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:55,851 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2018-07-23 15:26:55,851 INFO L472 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-07-23 15:26:55,851 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2018-07-23 15:26:55,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-07-23 15:26:55,852 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:55,852 INFO L353 BasicCegarLoop]: trace histogram [61, 60, 60, 59, 1, 1, 1, 1] [2018-07-23 15:26:55,852 INFO L414 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:55,852 INFO L82 PathProgramCache]: Analyzing trace with hash 316115649, now seen corresponding path program 118 times [2018-07-23 15:26:55,853 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7200 backedges. 3540 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:56,125 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:56,125 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-07-23 15:26:56,125 INFO L450 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-23 15:26:56,125 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-23 15:26:56,126 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1956, Invalid=2076, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:26:56,126 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand 64 states. [2018-07-23 15:26:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:56,586 INFO L93 Difference]: Finished difference Result 249 states and 250 transitions. [2018-07-23 15:26:56,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-07-23 15:26:56,586 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 244 [2018-07-23 15:26:56,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:56,587 INFO L225 Difference]: With dead ends: 249 [2018-07-23 15:26:56,587 INFO L226 Difference]: Without dead ends: 247 [2018-07-23 15:26:56,588 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3599 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:26:56,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-07-23 15:26:56,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-07-23 15:26:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-07-23 15:26:56,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2018-07-23 15:26:56,885 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 244 [2018-07-23 15:26:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:56,885 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2018-07-23 15:26:56,885 INFO L472 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-23 15:26:56,886 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2018-07-23 15:26:56,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-07-23 15:26:56,886 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:56,887 INFO L353 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1, 1, 1] [2018-07-23 15:26:56,887 INFO L414 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:56,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1155486981, now seen corresponding path program 119 times [2018-07-23 15:26:56,887 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 7320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:57,651 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:57,651 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123] total 123 [2018-07-23 15:26:57,651 INFO L450 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-07-23 15:26:57,652 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-07-23 15:26:57,652 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=15007, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:26:57,653 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand 124 states. [2018-07-23 15:27:00,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:00,345 INFO L93 Difference]: Finished difference Result 373 states and 375 transitions. [2018-07-23 15:27:00,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-07-23 15:27:00,345 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 246 [2018-07-23 15:27:00,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:00,346 INFO L225 Difference]: With dead ends: 373 [2018-07-23 15:27:00,346 INFO L226 Difference]: Without dead ends: 249 [2018-07-23 15:27:00,348 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1895 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=620, Invalid=34162, Unknown=0, NotChecked=0, Total=34782 [2018-07-23 15:27:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-07-23 15:27:00,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2018-07-23 15:27:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-07-23 15:27:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2018-07-23 15:27:00,650 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 246 [2018-07-23 15:27:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:00,650 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2018-07-23 15:27:00,651 INFO L472 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-07-23 15:27:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2018-07-23 15:27:00,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-07-23 15:27:00,651 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:00,651 INFO L353 BasicCegarLoop]: trace histogram [62, 61, 61, 60, 1, 1, 1, 1] [2018-07-23 15:27:00,652 INFO L414 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:00,652 INFO L82 PathProgramCache]: Analyzing trace with hash -364868043, now seen corresponding path program 120 times [2018-07-23 15:27:00,652 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7442 backedges. 3660 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:00,848 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:00,848 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-07-23 15:27:00,848 INFO L450 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-23 15:27:00,848 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-23 15:27:00,849 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2019, Invalid=2141, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:27:00,849 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand 65 states. [2018-07-23 15:27:01,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:01,303 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2018-07-23 15:27:01,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-07-23 15:27:01,303 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 248 [2018-07-23 15:27:01,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:01,303 INFO L225 Difference]: With dead ends: 253 [2018-07-23 15:27:01,304 INFO L226 Difference]: Without dead ends: 251 [2018-07-23 15:27:01,305 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3720 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-07-23 15:27:01,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-07-23 15:27:01,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-07-23 15:27:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-07-23 15:27:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2018-07-23 15:27:01,600 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 248 [2018-07-23 15:27:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:01,601 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2018-07-23 15:27:01,601 INFO L472 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-23 15:27:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2018-07-23 15:27:01,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-07-23 15:27:01,601 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:01,602 INFO L353 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1] [2018-07-23 15:27:01,602 INFO L414 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:01,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1549181295, now seen corresponding path program 121 times [2018-07-23 15:27:01,602 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 7564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:02,385 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:02,385 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125] total 125 [2018-07-23 15:27:02,385 INFO L450 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-07-23 15:27:02,385 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-07-23 15:27:02,386 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=15501, Unknown=0, NotChecked=0, Total=15750 [2018-07-23 15:27:02,386 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand 126 states. [2018-07-23 15:27:05,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:05,166 INFO L93 Difference]: Finished difference Result 379 states and 381 transitions. [2018-07-23 15:27:05,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-07-23 15:27:05,166 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 250 [2018-07-23 15:27:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:05,167 INFO L225 Difference]: With dead ends: 379 [2018-07-23 15:27:05,167 INFO L226 Difference]: Without dead ends: 253 [2018-07-23 15:27:05,169 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=630, Invalid=35280, Unknown=0, NotChecked=0, Total=35910 [2018-07-23 15:27:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-07-23 15:27:05,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-07-23 15:27:05,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-07-23 15:27:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2018-07-23 15:27:05,483 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 250 [2018-07-23 15:27:05,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:05,483 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2018-07-23 15:27:05,483 INFO L472 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-07-23 15:27:05,483 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2018-07-23 15:27:05,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-07-23 15:27:05,484 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:05,484 INFO L353 BasicCegarLoop]: trace histogram [63, 62, 62, 61, 1, 1, 1, 1] [2018-07-23 15:27:05,484 INFO L414 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:05,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1711167401, now seen corresponding path program 122 times [2018-07-23 15:27:05,484 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7688 backedges. 3782 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:05,674 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:05,674 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-07-23 15:27:05,674 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-23 15:27:05,674 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-23 15:27:05,675 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2083, Invalid=2207, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:27:05,675 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand 66 states. [2018-07-23 15:27:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:06,150 INFO L93 Difference]: Finished difference Result 257 states and 258 transitions. [2018-07-23 15:27:06,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-07-23 15:27:06,151 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 252 [2018-07-23 15:27:06,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:06,152 INFO L225 Difference]: With dead ends: 257 [2018-07-23 15:27:06,152 INFO L226 Difference]: Without dead ends: 255 [2018-07-23 15:27:06,153 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3843 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:27:06,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-07-23 15:27:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-07-23 15:27:06,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-07-23 15:27:06,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2018-07-23 15:27:06,459 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 252 [2018-07-23 15:27:06,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:06,460 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2018-07-23 15:27:06,460 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-23 15:27:06,460 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2018-07-23 15:27:06,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-07-23 15:27:06,461 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:06,461 INFO L353 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1, 1, 1] [2018-07-23 15:27:06,461 INFO L414 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:06,461 INFO L82 PathProgramCache]: Analyzing trace with hash -540549661, now seen corresponding path program 123 times [2018-07-23 15:27:06,462 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:07,240 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:07,240 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127] total 127 [2018-07-23 15:27:07,240 INFO L450 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-07-23 15:27:07,241 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-07-23 15:27:07,241 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=16003, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:27:07,242 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand 128 states. [2018-07-23 15:27:10,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:10,331 INFO L93 Difference]: Finished difference Result 385 states and 387 transitions. [2018-07-23 15:27:10,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-07-23 15:27:10,331 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 254 [2018-07-23 15:27:10,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:10,332 INFO L225 Difference]: With dead ends: 385 [2018-07-23 15:27:10,332 INFO L226 Difference]: Without dead ends: 257 [2018-07-23 15:27:10,333 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2020 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=640, Invalid=36416, Unknown=0, NotChecked=0, Total=37056 [2018-07-23 15:27:10,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-07-23 15:27:10,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2018-07-23 15:27:10,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-07-23 15:27:10,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2018-07-23 15:27:10,677 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 254 [2018-07-23 15:27:10,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:10,677 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2018-07-23 15:27:10,677 INFO L472 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-07-23 15:27:10,678 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2018-07-23 15:27:10,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-07-23 15:27:10,678 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:10,679 INFO L353 BasicCegarLoop]: trace histogram [64, 63, 63, 62, 1, 1, 1, 1] [2018-07-23 15:27:10,679 INFO L414 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:10,679 INFO L82 PathProgramCache]: Analyzing trace with hash -975837411, now seen corresponding path program 124 times [2018-07-23 15:27:10,679 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7938 backedges. 3906 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:10,881 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:10,881 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-07-23 15:27:10,881 INFO L450 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-23 15:27:10,882 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-23 15:27:10,882 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2148, Invalid=2274, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:27:10,882 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand 67 states. [2018-07-23 15:27:11,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:11,391 INFO L93 Difference]: Finished difference Result 261 states and 262 transitions. [2018-07-23 15:27:11,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-07-23 15:27:11,391 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 256 [2018-07-23 15:27:11,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:11,392 INFO L225 Difference]: With dead ends: 261 [2018-07-23 15:27:11,392 INFO L226 Difference]: Without dead ends: 259 [2018-07-23 15:27:11,393 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3968 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:27:11,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-07-23 15:27:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-07-23 15:27:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-07-23 15:27:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2018-07-23 15:27:11,739 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 256 [2018-07-23 15:27:11,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:11,739 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2018-07-23 15:27:11,739 INFO L472 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-23 15:27:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2018-07-23 15:27:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-07-23 15:27:11,740 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:11,740 INFO L353 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1] [2018-07-23 15:27:11,740 INFO L414 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1476829097, now seen corresponding path program 125 times [2018-07-23 15:27:11,741 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:12,568 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:12,568 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129] total 129 [2018-07-23 15:27:12,569 INFO L450 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-07-23 15:27:12,569 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-07-23 15:27:12,570 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=16513, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:27:12,570 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 130 states. [2018-07-23 15:27:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:15,565 INFO L93 Difference]: Finished difference Result 391 states and 393 transitions. [2018-07-23 15:27:15,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-07-23 15:27:15,565 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 258 [2018-07-23 15:27:15,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:15,566 INFO L225 Difference]: With dead ends: 391 [2018-07-23 15:27:15,566 INFO L226 Difference]: Without dead ends: 261 [2018-07-23 15:27:15,567 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2084 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=650, Invalid=37570, Unknown=0, NotChecked=0, Total=38220 [2018-07-23 15:27:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-07-23 15:27:15,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-07-23 15:27:15,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-07-23 15:27:15,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2018-07-23 15:27:15,888 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 258 [2018-07-23 15:27:15,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:15,889 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2018-07-23 15:27:15,889 INFO L472 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-07-23 15:27:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2018-07-23 15:27:15,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-07-23 15:27:15,890 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:15,890 INFO L353 BasicCegarLoop]: trace histogram [65, 64, 64, 63, 1, 1, 1, 1] [2018-07-23 15:27:15,890 INFO L414 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:15,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1493974161, now seen corresponding path program 126 times [2018-07-23 15:27:15,890 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8192 backedges. 4032 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:16,099 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:16,099 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-07-23 15:27:16,099 INFO L450 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-23 15:27:16,100 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-23 15:27:16,100 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2214, Invalid=2342, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:27:16,100 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand 68 states. [2018-07-23 15:27:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:16,637 INFO L93 Difference]: Finished difference Result 265 states and 266 transitions. [2018-07-23 15:27:16,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-07-23 15:27:16,638 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 260 [2018-07-23 15:27:16,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:16,639 INFO L225 Difference]: With dead ends: 265 [2018-07-23 15:27:16,639 INFO L226 Difference]: Without dead ends: 263 [2018-07-23 15:27:16,640 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-07-23 15:27:16,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-07-23 15:27:16,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-07-23 15:27:16,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-07-23 15:27:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2018-07-23 15:27:16,964 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 260 [2018-07-23 15:27:16,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:16,964 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2018-07-23 15:27:16,965 INFO L472 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-23 15:27:16,965 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2018-07-23 15:27:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-07-23 15:27:16,966 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:16,966 INFO L353 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1, 1, 1] [2018-07-23 15:27:16,966 INFO L414 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:16,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1190144203, now seen corresponding path program 127 times [2018-07-23 15:27:16,967 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 8320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:17,779 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:17,779 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131] total 131 [2018-07-23 15:27:17,779 INFO L450 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-07-23 15:27:17,780 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-07-23 15:27:17,781 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=17031, Unknown=0, NotChecked=0, Total=17292 [2018-07-23 15:27:17,781 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand 132 states. [2018-07-23 15:27:20,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:20,915 INFO L93 Difference]: Finished difference Result 397 states and 399 transitions. [2018-07-23 15:27:20,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-07-23 15:27:20,915 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 262 [2018-07-23 15:27:20,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:20,916 INFO L225 Difference]: With dead ends: 397 [2018-07-23 15:27:20,916 INFO L226 Difference]: Without dead ends: 265 [2018-07-23 15:27:20,917 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=660, Invalid=38742, Unknown=0, NotChecked=0, Total=39402 [2018-07-23 15:27:20,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-07-23 15:27:21,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2018-07-23 15:27:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-07-23 15:27:21,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2018-07-23 15:27:21,260 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 262 [2018-07-23 15:27:21,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:21,260 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2018-07-23 15:27:21,261 INFO L472 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-07-23 15:27:21,261 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2018-07-23 15:27:21,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-07-23 15:27:21,261 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:21,262 INFO L353 BasicCegarLoop]: trace histogram [66, 65, 65, 64, 1, 1, 1, 1] [2018-07-23 15:27:21,262 INFO L414 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:21,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1046894597, now seen corresponding path program 128 times [2018-07-23 15:27:21,262 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8450 backedges. 4160 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:21,489 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:21,489 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-07-23 15:27:21,489 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-23 15:27:21,489 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-23 15:27:21,489 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2281, Invalid=2411, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:27:21,490 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand 69 states. [2018-07-23 15:27:22,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:22,016 INFO L93 Difference]: Finished difference Result 269 states and 270 transitions. [2018-07-23 15:27:22,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-07-23 15:27:22,016 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 264 [2018-07-23 15:27:22,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:22,017 INFO L225 Difference]: With dead ends: 269 [2018-07-23 15:27:22,017 INFO L226 Difference]: Without dead ends: 267 [2018-07-23 15:27:22,019 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-07-23 15:27:22,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-07-23 15:27:22,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-07-23 15:27:22,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-07-23 15:27:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2018-07-23 15:27:22,363 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 264 [2018-07-23 15:27:22,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:22,363 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2018-07-23 15:27:22,363 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-23 15:27:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2018-07-23 15:27:22,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-07-23 15:27:22,364 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:22,364 INFO L353 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1, 1, 1] [2018-07-23 15:27:22,364 INFO L414 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:22,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1043412799, now seen corresponding path program 129 times [2018-07-23 15:27:22,364 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 8580 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:23,205 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:23,206 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133] total 133 [2018-07-23 15:27:23,206 INFO L450 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-07-23 15:27:23,206 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-07-23 15:27:23,207 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=17557, Unknown=0, NotChecked=0, Total=17822 [2018-07-23 15:27:23,207 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 134 states. [2018-07-23 15:27:26,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:26,342 INFO L93 Difference]: Finished difference Result 403 states and 405 transitions. [2018-07-23 15:27:26,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-07-23 15:27:26,342 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 266 [2018-07-23 15:27:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:26,343 INFO L225 Difference]: With dead ends: 403 [2018-07-23 15:27:26,343 INFO L226 Difference]: Without dead ends: 269 [2018-07-23 15:27:26,344 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=670, Invalid=39932, Unknown=0, NotChecked=0, Total=40602 [2018-07-23 15:27:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-07-23 15:27:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2018-07-23 15:27:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-07-23 15:27:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2018-07-23 15:27:26,680 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 266 [2018-07-23 15:27:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:26,681 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2018-07-23 15:27:26,681 INFO L472 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-07-23 15:27:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2018-07-23 15:27:26,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-07-23 15:27:26,682 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:26,682 INFO L353 BasicCegarLoop]: trace histogram [67, 66, 66, 65, 1, 1, 1, 1] [2018-07-23 15:27:26,682 INFO L414 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:26,682 INFO L82 PathProgramCache]: Analyzing trace with hash 606681465, now seen corresponding path program 130 times [2018-07-23 15:27:26,682 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8712 backedges. 4290 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:26,891 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:26,891 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-07-23 15:27:26,891 INFO L450 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-23 15:27:26,892 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-23 15:27:26,892 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2349, Invalid=2481, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:27:26,892 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand 70 states. [2018-07-23 15:27:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:27,450 INFO L93 Difference]: Finished difference Result 273 states and 274 transitions. [2018-07-23 15:27:27,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-07-23 15:27:27,450 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 268 [2018-07-23 15:27:27,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:27,451 INFO L225 Difference]: With dead ends: 273 [2018-07-23 15:27:27,451 INFO L226 Difference]: Without dead ends: 271 [2018-07-23 15:27:27,453 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4355 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:27:27,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-07-23 15:27:27,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-07-23 15:27:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-07-23 15:27:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2018-07-23 15:27:27,811 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 268 [2018-07-23 15:27:27,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:27,811 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2018-07-23 15:27:27,811 INFO L472 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-23 15:27:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2018-07-23 15:27:27,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-07-23 15:27:27,812 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:27,812 INFO L353 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 1, 1, 1, 1] [2018-07-23 15:27:27,812 INFO L414 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:27,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1094612045, now seen corresponding path program 131 times [2018-07-23 15:27:27,812 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 8844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:28,740 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:28,740 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135] total 135 [2018-07-23 15:27:28,740 INFO L450 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-07-23 15:27:28,741 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-07-23 15:27:28,741 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=18091, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:27:28,741 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 136 states. [2018-07-23 15:27:31,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:31,922 INFO L93 Difference]: Finished difference Result 409 states and 411 transitions. [2018-07-23 15:27:31,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-07-23 15:27:31,922 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 270 [2018-07-23 15:27:31,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:31,923 INFO L225 Difference]: With dead ends: 409 [2018-07-23 15:27:31,923 INFO L226 Difference]: Without dead ends: 273 [2018-07-23 15:27:31,925 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2282 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=680, Invalid=41140, Unknown=0, NotChecked=0, Total=41820 [2018-07-23 15:27:31,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-07-23 15:27:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2018-07-23 15:27:32,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-07-23 15:27:32,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 274 transitions. [2018-07-23 15:27:32,272 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 274 transitions. Word has length 270 [2018-07-23 15:27:32,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:32,273 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 274 transitions. [2018-07-23 15:27:32,273 INFO L472 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-07-23 15:27:32,273 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 274 transitions. [2018-07-23 15:27:32,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-07-23 15:27:32,274 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:32,274 INFO L353 BasicCegarLoop]: trace histogram [68, 67, 67, 66, 1, 1, 1, 1] [2018-07-23 15:27:32,274 INFO L414 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:32,274 INFO L82 PathProgramCache]: Analyzing trace with hash 135913709, now seen corresponding path program 132 times [2018-07-23 15:27:32,274 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8978 backedges. 4422 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:32,567 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:32,568 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-07-23 15:27:32,568 INFO L450 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-23 15:27:32,568 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-23 15:27:32,569 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2418, Invalid=2552, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:27:32,569 INFO L87 Difference]: Start difference. First operand 273 states and 274 transitions. Second operand 71 states. [2018-07-23 15:27:33,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:33,170 INFO L93 Difference]: Finished difference Result 277 states and 278 transitions. [2018-07-23 15:27:33,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-07-23 15:27:33,170 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 272 [2018-07-23 15:27:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:33,171 INFO L225 Difference]: With dead ends: 277 [2018-07-23 15:27:33,171 INFO L226 Difference]: Without dead ends: 275 [2018-07-23 15:27:33,172 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4488 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:27:33,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-07-23 15:27:33,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-07-23 15:27:33,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-07-23 15:27:33,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2018-07-23 15:27:33,522 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 272 [2018-07-23 15:27:33,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:33,522 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2018-07-23 15:27:33,522 INFO L472 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-23 15:27:33,522 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2018-07-23 15:27:33,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-07-23 15:27:33,523 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:33,523 INFO L353 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1, 1, 1] [2018-07-23 15:27:33,523 INFO L414 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:33,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1764107815, now seen corresponding path program 133 times [2018-07-23 15:27:33,524 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 9112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:34,422 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:34,422 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137] total 137 [2018-07-23 15:27:34,422 INFO L450 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-07-23 15:27:34,423 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-07-23 15:27:34,423 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=18633, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:27:34,424 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand 138 states. [2018-07-23 15:27:37,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:37,868 INFO L93 Difference]: Finished difference Result 415 states and 417 transitions. [2018-07-23 15:27:37,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-07-23 15:27:37,869 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 274 [2018-07-23 15:27:37,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:37,869 INFO L225 Difference]: With dead ends: 415 [2018-07-23 15:27:37,869 INFO L226 Difference]: Without dead ends: 277 [2018-07-23 15:27:37,871 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=690, Invalid=42366, Unknown=0, NotChecked=0, Total=43056 [2018-07-23 15:27:37,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-07-23 15:27:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2018-07-23 15:27:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-07-23 15:27:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2018-07-23 15:27:38,235 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 274 [2018-07-23 15:27:38,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:38,235 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2018-07-23 15:27:38,235 INFO L472 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-07-23 15:27:38,235 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2018-07-23 15:27:38,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-07-23 15:27:38,236 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:38,236 INFO L353 BasicCegarLoop]: trace histogram [69, 68, 68, 67, 1, 1, 1, 1] [2018-07-23 15:27:38,237 INFO L414 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:38,237 INFO L82 PathProgramCache]: Analyzing trace with hash -142782879, now seen corresponding path program 134 times [2018-07-23 15:27:38,237 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9248 backedges. 4556 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:38,463 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:38,463 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-07-23 15:27:38,463 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 15:27:38,464 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 15:27:38,464 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2488, Invalid=2624, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:27:38,464 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand 72 states. [2018-07-23 15:27:39,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:39,017 INFO L93 Difference]: Finished difference Result 281 states and 282 transitions. [2018-07-23 15:27:39,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-07-23 15:27:39,017 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 276 [2018-07-23 15:27:39,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:39,018 INFO L225 Difference]: With dead ends: 281 [2018-07-23 15:27:39,018 INFO L226 Difference]: Without dead ends: 279 [2018-07-23 15:27:39,020 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4623 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:27:39,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-07-23 15:27:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-07-23 15:27:39,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-07-23 15:27:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2018-07-23 15:27:39,386 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 276 [2018-07-23 15:27:39,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:39,386 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2018-07-23 15:27:39,386 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 15:27:39,386 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2018-07-23 15:27:39,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-07-23 15:27:39,387 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:39,387 INFO L353 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 1, 1, 1, 1] [2018-07-23 15:27:39,387 INFO L414 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:39,388 INFO L82 PathProgramCache]: Analyzing trace with hash 224659099, now seen corresponding path program 135 times [2018-07-23 15:27:39,388 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 9384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:40,435 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:40,435 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139] total 139 [2018-07-23 15:27:40,435 INFO L450 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-07-23 15:27:40,435 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-07-23 15:27:40,436 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=19183, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:27:40,436 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand 140 states. [2018-07-23 15:27:43,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:43,962 INFO L93 Difference]: Finished difference Result 421 states and 423 transitions. [2018-07-23 15:27:43,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-07-23 15:27:43,963 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 278 [2018-07-23 15:27:43,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:43,963 INFO L225 Difference]: With dead ends: 421 [2018-07-23 15:27:43,963 INFO L226 Difference]: Without dead ends: 281 [2018-07-23 15:27:43,965 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2419 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=700, Invalid=43610, Unknown=0, NotChecked=0, Total=44310 [2018-07-23 15:27:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-07-23 15:27:44,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2018-07-23 15:27:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-07-23 15:27:44,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 282 transitions. [2018-07-23 15:27:44,342 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 282 transitions. Word has length 278 [2018-07-23 15:27:44,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:44,342 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 282 transitions. [2018-07-23 15:27:44,342 INFO L472 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-07-23 15:27:44,342 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 282 transitions. [2018-07-23 15:27:44,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-07-23 15:27:44,343 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:44,343 INFO L353 BasicCegarLoop]: trace histogram [70, 69, 69, 68, 1, 1, 1, 1] [2018-07-23 15:27:44,343 INFO L414 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:44,343 INFO L82 PathProgramCache]: Analyzing trace with hash -820477483, now seen corresponding path program 136 times [2018-07-23 15:27:44,343 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9522 backedges. 4692 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:44,581 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:44,581 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-07-23 15:27:44,582 INFO L450 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-23 15:27:44,582 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-23 15:27:44,582 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2559, Invalid=2697, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:27:44,583 INFO L87 Difference]: Start difference. First operand 281 states and 282 transitions. Second operand 73 states. [2018-07-23 15:27:45,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:45,278 INFO L93 Difference]: Finished difference Result 285 states and 286 transitions. [2018-07-23 15:27:45,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-07-23 15:27:45,278 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 280 [2018-07-23 15:27:45,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:45,279 INFO L225 Difference]: With dead ends: 285 [2018-07-23 15:27:45,279 INFO L226 Difference]: Without dead ends: 283 [2018-07-23 15:27:45,281 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4760 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:27:45,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-07-23 15:27:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-07-23 15:27:45,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-07-23 15:27:45,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2018-07-23 15:27:45,835 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 280 [2018-07-23 15:27:45,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:45,835 INFO L471 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2018-07-23 15:27:45,835 INFO L472 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-23 15:27:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2018-07-23 15:27:45,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-07-23 15:27:45,836 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:45,836 INFO L353 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1, 1, 1] [2018-07-23 15:27:45,836 INFO L414 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:45,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1795173647, now seen corresponding path program 137 times [2018-07-23 15:27:45,836 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 0 proven. 9660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:46,780 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:46,780 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141] total 141 [2018-07-23 15:27:46,780 INFO L450 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-07-23 15:27:46,781 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-07-23 15:27:46,782 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=19741, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:27:46,782 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand 142 states. [2018-07-23 15:27:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:50,436 INFO L93 Difference]: Finished difference Result 427 states and 429 transitions. [2018-07-23 15:27:50,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-07-23 15:27:50,436 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 282 [2018-07-23 15:27:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:50,437 INFO L225 Difference]: With dead ends: 427 [2018-07-23 15:27:50,437 INFO L226 Difference]: Without dead ends: 285 [2018-07-23 15:27:50,438 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2489 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=710, Invalid=44872, Unknown=0, NotChecked=0, Total=45582 [2018-07-23 15:27:50,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-07-23 15:27:50,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2018-07-23 15:27:50,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-07-23 15:27:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2018-07-23 15:27:50,821 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 282 [2018-07-23 15:27:50,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:50,821 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2018-07-23 15:27:50,822 INFO L472 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-07-23 15:27:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2018-07-23 15:27:50,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-07-23 15:27:50,822 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:50,822 INFO L353 BasicCegarLoop]: trace histogram [71, 70, 70, 69, 1, 1, 1, 1] [2018-07-23 15:27:50,823 INFO L414 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:50,823 INFO L82 PathProgramCache]: Analyzing trace with hash -80708791, now seen corresponding path program 138 times [2018-07-23 15:27:50,823 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9800 backedges. 4830 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:51,070 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:51,070 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-07-23 15:27:51,070 INFO L450 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-23 15:27:51,070 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-23 15:27:51,071 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2631, Invalid=2771, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:27:51,071 INFO L87 Difference]: Start difference. First operand 285 states and 286 transitions. Second operand 74 states. [2018-07-23 15:27:51,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:51,722 INFO L93 Difference]: Finished difference Result 289 states and 290 transitions. [2018-07-23 15:27:51,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-07-23 15:27:51,722 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 284 [2018-07-23 15:27:51,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:51,723 INFO L225 Difference]: With dead ends: 289 [2018-07-23 15:27:51,723 INFO L226 Difference]: Without dead ends: 287 [2018-07-23 15:27:51,724 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-07-23 15:27:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-07-23 15:27:52,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-07-23 15:27:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-07-23 15:27:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions. [2018-07-23 15:27:52,117 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 284 [2018-07-23 15:27:52,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:52,117 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 288 transitions. [2018-07-23 15:27:52,117 INFO L472 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-23 15:27:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions. [2018-07-23 15:27:52,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-07-23 15:27:52,118 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:52,118 INFO L353 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 1, 1, 1, 1] [2018-07-23 15:27:52,118 INFO L414 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:52,118 INFO L82 PathProgramCache]: Analyzing trace with hash -251684477, now seen corresponding path program 139 times [2018-07-23 15:27:52,118 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 9940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:53,113 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:53,114 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143] total 143 [2018-07-23 15:27:53,114 INFO L450 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-07-23 15:27:53,114 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-07-23 15:27:53,115 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=20307, Unknown=0, NotChecked=0, Total=20592 [2018-07-23 15:27:53,115 INFO L87 Difference]: Start difference. First operand 287 states and 288 transitions. Second operand 144 states. [2018-07-23 15:27:56,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:56,856 INFO L93 Difference]: Finished difference Result 433 states and 435 transitions. [2018-07-23 15:27:56,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-07-23 15:27:56,856 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 286 [2018-07-23 15:27:56,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:56,856 INFO L225 Difference]: With dead ends: 433 [2018-07-23 15:27:56,857 INFO L226 Difference]: Without dead ends: 289 [2018-07-23 15:27:56,859 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=720, Invalid=46152, Unknown=0, NotChecked=0, Total=46872 [2018-07-23 15:27:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-07-23 15:27:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2018-07-23 15:27:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-07-23 15:27:57,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2018-07-23 15:27:57,247 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 286 [2018-07-23 15:27:57,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:57,247 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2018-07-23 15:27:57,248 INFO L472 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-07-23 15:27:57,248 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2018-07-23 15:27:57,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-07-23 15:27:57,248 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:57,248 INFO L353 BasicCegarLoop]: trace histogram [72, 71, 71, 70, 1, 1, 1, 1] [2018-07-23 15:27:57,249 INFO L414 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:57,249 INFO L82 PathProgramCache]: Analyzing trace with hash 931805885, now seen corresponding path program 140 times [2018-07-23 15:27:57,249 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10082 backedges. 4970 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:57,489 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:57,490 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-07-23 15:27:57,490 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-23 15:27:57,490 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-23 15:27:57,490 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2704, Invalid=2846, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:27:57,491 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand 75 states. [2018-07-23 15:27:58,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:58,156 INFO L93 Difference]: Finished difference Result 293 states and 294 transitions. [2018-07-23 15:27:58,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-07-23 15:27:58,156 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 288 [2018-07-23 15:27:58,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:58,157 INFO L225 Difference]: With dead ends: 293 [2018-07-23 15:27:58,157 INFO L226 Difference]: Without dead ends: 291 [2018-07-23 15:27:58,157 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5040 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:27:58,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-07-23 15:27:58,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-07-23 15:27:58,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-07-23 15:27:58,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2018-07-23 15:27:58,550 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 288 [2018-07-23 15:27:58,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:58,550 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2018-07-23 15:27:58,550 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-23 15:27:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2018-07-23 15:27:58,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-07-23 15:27:58,551 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:58,551 INFO L353 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1, 1, 1] [2018-07-23 15:27:58,551 INFO L414 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:58,551 INFO L82 PathProgramCache]: Analyzing trace with hash 2112310263, now seen corresponding path program 141 times [2018-07-23 15:27:58,551 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 10224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:59,539 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:59,540 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145] total 145 [2018-07-23 15:27:59,540 INFO L450 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-07-23 15:27:59,540 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-07-23 15:27:59,541 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=20881, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:27:59,541 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand 146 states. [2018-07-23 15:28:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:28:03,794 INFO L93 Difference]: Finished difference Result 439 states and 441 transitions. [2018-07-23 15:28:03,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-07-23 15:28:03,795 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 290 [2018-07-23 15:28:03,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:28:03,795 INFO L225 Difference]: With dead ends: 439 [2018-07-23 15:28:03,795 INFO L226 Difference]: Without dead ends: 293 [2018-07-23 15:28:03,797 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2632 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=730, Invalid=47450, Unknown=0, NotChecked=0, Total=48180 [2018-07-23 15:28:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-07-23 15:28:04,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2018-07-23 15:28:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-07-23 15:28:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 294 transitions. [2018-07-23 15:28:04,338 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 294 transitions. Word has length 290 [2018-07-23 15:28:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:28:04,338 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 294 transitions. [2018-07-23 15:28:04,338 INFO L472 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-07-23 15:28:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 294 transitions. [2018-07-23 15:28:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-07-23 15:28:04,339 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:28:04,339 INFO L353 BasicCegarLoop]: trace histogram [73, 72, 72, 71, 1, 1, 1, 1] [2018-07-23 15:28:04,339 INFO L414 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:28:04,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1332396081, now seen corresponding path program 142 times [2018-07-23 15:28:04,340 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:28:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:28:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10368 backedges. 5112 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:28:04,596 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:28:04,596 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-07-23 15:28:04,597 INFO L450 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-23 15:28:04,597 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-23 15:28:04,597 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2778, Invalid=2922, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:28:04,597 INFO L87 Difference]: Start difference. First operand 293 states and 294 transitions. Second operand 76 states. [2018-07-23 15:28:05,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:28:05,383 INFO L93 Difference]: Finished difference Result 297 states and 298 transitions. [2018-07-23 15:28:05,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-07-23 15:28:05,383 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 292 [2018-07-23 15:28:05,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:28:05,384 INFO L225 Difference]: With dead ends: 297 [2018-07-23 15:28:05,384 INFO L226 Difference]: Without dead ends: 295 [2018-07-23 15:28:05,386 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:28:05,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-07-23 15:28:05,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-07-23 15:28:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-07-23 15:28:05,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2018-07-23 15:28:05,800 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 292 [2018-07-23 15:28:05,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:28:05,800 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2018-07-23 15:28:05,800 INFO L472 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-23 15:28:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2018-07-23 15:28:05,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-07-23 15:28:05,801 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:28:05,801 INFO L353 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 1, 1, 1, 1] [2018-07-23 15:28:05,801 INFO L414 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:28:05,801 INFO L82 PathProgramCache]: Analyzing trace with hash 532431979, now seen corresponding path program 143 times [2018-07-23 15:28:05,802 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:28:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:28:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 10512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:28:06,886 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:28:06,886 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147] total 147 [2018-07-23 15:28:06,886 INFO L450 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-07-23 15:28:06,886 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-07-23 15:28:06,887 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=21463, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:28:06,887 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 148 states. [2018-07-23 15:28:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:28:10,661 INFO L93 Difference]: Finished difference Result 445 states and 447 transitions. [2018-07-23 15:28:10,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-07-23 15:28:10,661 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 294 [2018-07-23 15:28:10,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:28:10,661 INFO L225 Difference]: With dead ends: 445 [2018-07-23 15:28:10,662 INFO L226 Difference]: Without dead ends: 297 [2018-07-23 15:28:10,664 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2705 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=740, Invalid=48766, Unknown=0, NotChecked=0, Total=49506 [2018-07-23 15:28:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-07-23 15:28:11,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2018-07-23 15:28:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-07-23 15:28:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 298 transitions. [2018-07-23 15:28:11,136 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 298 transitions. Word has length 294 [2018-07-23 15:28:11,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:28:11,136 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 298 transitions. [2018-07-23 15:28:11,137 INFO L472 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-07-23 15:28:11,137 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 298 transitions. [2018-07-23 15:28:11,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-07-23 15:28:11,137 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:28:11,138 INFO L353 BasicCegarLoop]: trace histogram [74, 73, 73, 72, 1, 1, 1, 1] [2018-07-23 15:28:11,138 INFO L414 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:28:11,138 INFO L82 PathProgramCache]: Analyzing trace with hash -577303643, now seen corresponding path program 144 times [2018-07-23 15:28:11,138 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:28:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:28:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10658 backedges. 5256 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:28:11,387 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:28:11,387 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-07-23 15:28:11,387 INFO L450 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-23 15:28:11,388 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-23 15:28:11,388 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2853, Invalid=2999, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:28:11,388 INFO L87 Difference]: Start difference. First operand 297 states and 298 transitions. Second operand 77 states. [2018-07-23 15:28:12,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:28:12,074 INFO L93 Difference]: Finished difference Result 301 states and 302 transitions. [2018-07-23 15:28:12,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-07-23 15:28:12,074 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 296 [2018-07-23 15:28:12,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:28:12,075 INFO L225 Difference]: With dead ends: 301 [2018-07-23 15:28:12,075 INFO L226 Difference]: Without dead ends: 299 [2018-07-23 15:28:12,076 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5328 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-07-23 15:28:12,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-07-23 15:28:12,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-07-23 15:28:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-07-23 15:28:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2018-07-23 15:28:12,511 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 296 [2018-07-23 15:28:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:28:12,511 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2018-07-23 15:28:12,511 INFO L472 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-23 15:28:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2018-07-23 15:28:12,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-07-23 15:28:12,512 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:28:12,512 INFO L353 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1, 1, 1] [2018-07-23 15:28:12,513 INFO L414 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:28:12,513 INFO L82 PathProgramCache]: Analyzing trace with hash -737967393, now seen corresponding path program 145 times [2018-07-23 15:28:12,513 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:28:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:28:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 10804 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:28:13,574 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:28:13,574 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149] total 149 [2018-07-23 15:28:13,574 INFO L450 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-07-23 15:28:13,574 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-07-23 15:28:13,575 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=22053, Unknown=0, NotChecked=0, Total=22350 [2018-07-23 15:28:13,575 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand 150 states. [2018-07-23 15:28:17,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:28:17,540 INFO L93 Difference]: Finished difference Result 451 states and 453 transitions. [2018-07-23 15:28:17,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-07-23 15:28:17,540 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 298 [2018-07-23 15:28:17,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:28:17,541 INFO L225 Difference]: With dead ends: 451 [2018-07-23 15:28:17,541 INFO L226 Difference]: Without dead ends: 301 [2018-07-23 15:28:17,545 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2779 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=750, Invalid=50100, Unknown=0, NotChecked=0, Total=50850 [2018-07-23 15:28:17,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-07-23 15:28:18,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2018-07-23 15:28:18,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-07-23 15:28:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 302 transitions. [2018-07-23 15:28:18,048 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 302 transitions. Word has length 298 [2018-07-23 15:28:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:28:18,049 INFO L471 AbstractCegarLoop]: Abstraction has 301 states and 302 transitions. [2018-07-23 15:28:18,049 INFO L472 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-07-23 15:28:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 302 transitions. [2018-07-23 15:28:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-07-23 15:28:18,050 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:28:18,050 INFO L353 BasicCegarLoop]: trace histogram [75, 74, 74, 73, 1, 1, 1, 1] [2018-07-23 15:28:18,050 INFO L414 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:28:18,050 INFO L82 PathProgramCache]: Analyzing trace with hash 206839065, now seen corresponding path program 146 times [2018-07-23 15:28:18,050 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:28:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:28:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10952 backedges. 5402 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:28:18,310 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:28:18,311 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-07-23 15:28:18,311 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-23 15:28:18,311 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-23 15:28:18,311 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2929, Invalid=3077, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:28:18,311 INFO L87 Difference]: Start difference. First operand 301 states and 302 transitions. Second operand 78 states. [2018-07-23 15:28:19,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:28:19,028 INFO L93 Difference]: Finished difference Result 305 states and 306 transitions. [2018-07-23 15:28:19,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-07-23 15:28:19,029 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 300 [2018-07-23 15:28:19,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:28:19,029 INFO L225 Difference]: With dead ends: 305 [2018-07-23 15:28:19,030 INFO L226 Difference]: Without dead ends: 303 [2018-07-23 15:28:19,032 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5475 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:28:19,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-07-23 15:28:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-07-23 15:28:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-07-23 15:28:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 304 transitions. [2018-07-23 15:28:19,512 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 304 transitions. Word has length 300 [2018-07-23 15:28:19,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:28:19,512 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 304 transitions. [2018-07-23 15:28:19,512 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-23 15:28:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 304 transitions. [2018-07-23 15:28:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-07-23 15:28:19,513 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:28:19,513 INFO L353 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 1, 1, 1, 1] [2018-07-23 15:28:19,513 INFO L414 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:28:19,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1203898195, now seen corresponding path program 147 times [2018-07-23 15:28:19,513 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:28:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:28:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 11100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:28:20,566 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:28:20,566 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151] total 151 [2018-07-23 15:28:20,566 INFO L450 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-07-23 15:28:20,567 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-07-23 15:28:20,568 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=22651, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:28:20,568 INFO L87 Difference]: Start difference. First operand 303 states and 304 transitions. Second operand 152 states. [2018-07-23 15:28:24,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:28:24,703 INFO L93 Difference]: Finished difference Result 457 states and 459 transitions. [2018-07-23 15:28:24,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-07-23 15:28:24,703 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 302 [2018-07-23 15:28:24,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:28:24,704 INFO L225 Difference]: With dead ends: 457 [2018-07-23 15:28:24,704 INFO L226 Difference]: Without dead ends: 305 [2018-07-23 15:28:24,705 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2854 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=760, Invalid=51452, Unknown=0, NotChecked=0, Total=52212 [2018-07-23 15:28:24,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-07-23 15:28:25,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2018-07-23 15:28:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-07-23 15:28:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2018-07-23 15:28:25,141 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 302 [2018-07-23 15:28:25,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:28:25,141 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2018-07-23 15:28:25,141 INFO L472 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-07-23 15:28:25,141 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2018-07-23 15:28:25,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-07-23 15:28:25,142 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:28:25,142 INFO L353 BasicCegarLoop]: trace histogram [76, 75, 75, 74, 1, 1, 1, 1] [2018-07-23 15:28:25,142 INFO L414 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:28:25,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1432810637, now seen corresponding path program 148 times [2018-07-23 15:28:25,143 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:28:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:28:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11250 backedges. 5550 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:28:25,463 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:28:25,463 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-07-23 15:28:25,464 INFO L450 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-23 15:28:25,464 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-23 15:28:25,464 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3006, Invalid=3156, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:28:25,464 INFO L87 Difference]: Start difference. First operand 305 states and 306 transitions. Second operand 79 states. [2018-07-23 15:28:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:28:26,154 INFO L93 Difference]: Finished difference Result 309 states and 310 transitions. [2018-07-23 15:28:26,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-07-23 15:28:26,154 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 304 [2018-07-23 15:28:26,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:28:26,155 INFO L225 Difference]: With dead ends: 309 [2018-07-23 15:28:26,155 INFO L226 Difference]: Without dead ends: 307 [2018-07-23 15:28:26,157 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5624 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-07-23 15:28:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-07-23 15:28:26,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-07-23 15:28:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-07-23 15:28:26,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2018-07-23 15:28:26,608 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 304 [2018-07-23 15:28:26,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:28:26,609 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2018-07-23 15:28:26,609 INFO L472 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-23 15:28:26,609 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2018-07-23 15:28:26,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-07-23 15:28:26,609 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:28:26,610 INFO L353 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1, 1, 1] [2018-07-23 15:28:26,610 INFO L414 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:28:26,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1753427513, now seen corresponding path program 149 times [2018-07-23 15:28:26,610 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:28:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:28:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 11400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:28:27,821 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:28:27,821 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153] total 153 [2018-07-23 15:28:27,822 INFO L450 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-07-23 15:28:27,822 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-07-23 15:28:27,823 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=23257, Unknown=0, NotChecked=0, Total=23562 [2018-07-23 15:28:27,823 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 154 states. [2018-07-23 15:28:32,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:28:32,118 INFO L93 Difference]: Finished difference Result 463 states and 465 transitions. [2018-07-23 15:28:32,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-07-23 15:28:32,119 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 306 [2018-07-23 15:28:32,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:28:32,119 INFO L225 Difference]: With dead ends: 463 [2018-07-23 15:28:32,119 INFO L226 Difference]: Without dead ends: 309 [2018-07-23 15:28:32,121 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2930 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=770, Invalid=52822, Unknown=0, NotChecked=0, Total=53592 [2018-07-23 15:28:32,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-07-23 15:28:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2018-07-23 15:28:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-07-23 15:28:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 310 transitions. [2018-07-23 15:28:32,573 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 310 transitions. Word has length 306 [2018-07-23 15:28:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:28:32,573 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 310 transitions. [2018-07-23 15:28:32,573 INFO L472 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-07-23 15:28:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 310 transitions. [2018-07-23 15:28:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-07-23 15:28:32,574 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:28:32,574 INFO L353 BasicCegarLoop]: trace histogram [77, 76, 76, 75, 1, 1, 1, 1] [2018-07-23 15:28:32,574 INFO L414 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:28:32,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1108644353, now seen corresponding path program 150 times [2018-07-23 15:28:32,574 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:28:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:28:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11552 backedges. 5700 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:28:32,851 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:28:32,851 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-07-23 15:28:32,851 INFO L450 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-23 15:28:32,851 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-23 15:28:32,852 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3084, Invalid=3236, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:28:32,852 INFO L87 Difference]: Start difference. First operand 309 states and 310 transitions. Second operand 80 states. [2018-07-23 15:28:33,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:28:33,616 INFO L93 Difference]: Finished difference Result 313 states and 314 transitions. [2018-07-23 15:28:33,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-07-23 15:28:33,617 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 308 [2018-07-23 15:28:33,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:28:33,618 INFO L225 Difference]: With dead ends: 313 [2018-07-23 15:28:33,618 INFO L226 Difference]: Without dead ends: 311 [2018-07-23 15:28:33,620 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5775 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-07-23 15:28:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-07-23 15:28:34,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-07-23 15:28:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-07-23 15:28:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 312 transitions. [2018-07-23 15:28:34,284 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 312 transitions. Word has length 308 [2018-07-23 15:28:34,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:28:34,284 INFO L471 AbstractCegarLoop]: Abstraction has 311 states and 312 transitions. [2018-07-23 15:28:34,284 INFO L472 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-23 15:28:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 312 transitions. [2018-07-23 15:28:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-07-23 15:28:34,285 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:28:34,285 INFO L353 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 1, 1, 1, 1] [2018-07-23 15:28:34,285 INFO L414 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:28:34,285 INFO L82 PathProgramCache]: Analyzing trace with hash 255386171, now seen corresponding path program 151 times [2018-07-23 15:28:34,285 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:28:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:28:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 11704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:28:35,562 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:28:35,562 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155] total 155 [2018-07-23 15:28:35,562 INFO L450 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-07-23 15:28:35,563 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-07-23 15:28:35,563 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=23871, Unknown=0, NotChecked=0, Total=24180 [2018-07-23 15:28:35,563 INFO L87 Difference]: Start difference. First operand 311 states and 312 transitions. Second operand 156 states. [2018-07-23 15:28:40,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:28:40,141 INFO L93 Difference]: Finished difference Result 469 states and 471 transitions. [2018-07-23 15:28:40,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-07-23 15:28:40,141 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 310 [2018-07-23 15:28:40,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:28:40,142 INFO L225 Difference]: With dead ends: 469 [2018-07-23 15:28:40,142 INFO L226 Difference]: Without dead ends: 313 [2018-07-23 15:28:40,146 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=780, Invalid=54210, Unknown=0, NotChecked=0, Total=54990 [2018-07-23 15:28:40,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-07-23 15:28:40,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2018-07-23 15:28:40,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-07-23 15:28:40,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2018-07-23 15:28:40,653 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 310 [2018-07-23 15:28:40,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:28:40,654 INFO L471 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2018-07-23 15:28:40,654 INFO L472 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-07-23 15:28:40,654 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2018-07-23 15:28:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-07-23 15:28:40,655 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:28:40,655 INFO L353 BasicCegarLoop]: trace histogram [78, 77, 77, 76, 1, 1, 1, 1] [2018-07-23 15:28:40,655 INFO L414 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:28:40,655 INFO L82 PathProgramCache]: Analyzing trace with hash 723645813, now seen corresponding path program 152 times [2018-07-23 15:28:40,655 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:28:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:28:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11858 backedges. 5852 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:28:40,934 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:28:40,934 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-07-23 15:28:40,934 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-23 15:28:40,935 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-23 15:28:40,935 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3163, Invalid=3317, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:28:40,935 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand 81 states. [2018-07-23 15:28:41,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:28:41,742 INFO L93 Difference]: Finished difference Result 317 states and 318 transitions. [2018-07-23 15:28:41,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-07-23 15:28:41,742 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 312 [2018-07-23 15:28:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:28:41,743 INFO L225 Difference]: With dead ends: 317 [2018-07-23 15:28:41,743 INFO L226 Difference]: Without dead ends: 315 [2018-07-23 15:28:41,745 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5928 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:28:41,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-07-23 15:28:42,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-07-23 15:28:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-07-23 15:28:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2018-07-23 15:28:42,252 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 312 [2018-07-23 15:28:42,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:28:42,252 INFO L471 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2018-07-23 15:28:42,252 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-23 15:28:42,252 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2018-07-23 15:28:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-07-23 15:28:42,253 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:28:42,253 INFO L353 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 1, 1, 1, 1] [2018-07-23 15:28:42,253 INFO L414 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:28:42,253 INFO L82 PathProgramCache]: Analyzing trace with hash -361023313, now seen corresponding path program 153 times [2018-07-23 15:28:42,254 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:28:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:28:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 12012 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:28:43,459 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:28:43,460 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157] total 157 [2018-07-23 15:28:43,460 INFO L450 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-07-23 15:28:43,460 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-07-23 15:28:43,461 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=24493, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:28:43,461 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand 158 states. [2018-07-23 15:28:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:28:47,912 INFO L93 Difference]: Finished difference Result 475 states and 477 transitions. [2018-07-23 15:28:47,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-07-23 15:28:47,912 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 314 [2018-07-23 15:28:47,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:28:47,913 INFO L225 Difference]: With dead ends: 475 [2018-07-23 15:28:47,913 INFO L226 Difference]: Without dead ends: 317 [2018-07-23 15:28:47,916 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3085 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=790, Invalid=55616, Unknown=0, NotChecked=0, Total=56406 [2018-07-23 15:28:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2018-07-23 15:28:48,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2018-07-23 15:28:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-07-23 15:28:48,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 318 transitions. [2018-07-23 15:28:48,563 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 318 transitions. Word has length 314 [2018-07-23 15:28:48,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:28:48,564 INFO L471 AbstractCegarLoop]: Abstraction has 317 states and 318 transitions. [2018-07-23 15:28:48,564 INFO L472 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-07-23 15:28:48,564 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 318 transitions. [2018-07-23 15:28:48,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-07-23 15:28:48,565 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:28:48,565 INFO L353 BasicCegarLoop]: trace histogram [79, 78, 78, 77, 1, 1, 1, 1] [2018-07-23 15:28:48,565 INFO L414 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:28:48,565 INFO L82 PathProgramCache]: Analyzing trace with hash -120316183, now seen corresponding path program 154 times [2018-07-23 15:28:48,565 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:28:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:28:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12168 backedges. 6006 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:28:48,894 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:28:48,894 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-07-23 15:28:48,894 INFO L450 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-23 15:28:48,894 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-23 15:28:48,894 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3243, Invalid=3399, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:28:48,895 INFO L87 Difference]: Start difference. First operand 317 states and 318 transitions. Second operand 82 states. [2018-07-23 15:28:49,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:28:49,730 INFO L93 Difference]: Finished difference Result 321 states and 322 transitions. [2018-07-23 15:28:49,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-07-23 15:28:49,730 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 316 [2018-07-23 15:28:49,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:28:49,731 INFO L225 Difference]: With dead ends: 321 [2018-07-23 15:28:49,731 INFO L226 Difference]: Without dead ends: 319 [2018-07-23 15:28:49,732 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6083 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:28:49,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-07-23 15:28:50,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-07-23 15:28:50,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-07-23 15:28:50,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 320 transitions. [2018-07-23 15:28:50,223 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 320 transitions. Word has length 316 [2018-07-23 15:28:50,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:28:50,223 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 320 transitions. [2018-07-23 15:28:50,223 INFO L472 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-23 15:28:50,223 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 320 transitions. [2018-07-23 15:28:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-07-23 15:28:50,224 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:28:50,224 INFO L353 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 1, 1, 1, 1] [2018-07-23 15:28:50,224 INFO L414 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:28:50,224 INFO L82 PathProgramCache]: Analyzing trace with hash 340317475, now seen corresponding path program 155 times [2018-07-23 15:28:50,224 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:28:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-07-23 15:28:51,289 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 15:28:51,295 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 15:28:51,296 INFO L202 PluginConnector]: Adding new model invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 03:28:51 BoogieIcfgContainer [2018-07-23 15:28:51,296 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 15:28:51,297 INFO L168 Benchmark]: Toolchain (without parser) took 241193.10 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 18.4 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-07-23 15:28:51,298 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:28:51,299 INFO L168 Benchmark]: Boogie Preprocessor took 59.49 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:28:51,299 INFO L168 Benchmark]: RCFGBuilder took 245.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-23 15:28:51,299 INFO L168 Benchmark]: TraceAbstraction took 240878.00 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 7.9 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-07-23 15:28:51,302 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 59.49 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 245.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 240878.00 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 7.9 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 80). Cancelled while BasicCegarLoop was analyzing trace of length 319 with TraceHistMax 79, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 154 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 240.8s OverallTime, 157 OverallIterations, 79 TraceHistogramMax, 158.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 9712 SDtfs, 4317 SDslu, 649903 SDs, 0 SdLazy, 671864 SolverSat, 6097 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 45.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18869 GetRequests, 3159 SyntacticMatches, 0 SemanticMatches, 15710 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243609 ImplicationChecksByTransitivity, 80.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=319occurred in iteration=156, 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: 30.2s AutomataMinimizationTime, 156 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 4.7s SatisfiabilityAnalysisTime, 39.9s InterpolantComputationTime, 25116 NumberOfCodeBlocks, 25116 NumberOfCodeBlocksAsserted, 156 NumberOfCheckSat, 24960 ConstructedInterpolants, 0 QuantifiedInterpolants, 23976362 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 156 InterpolantComputations, 1 PerfectInterpolantSequences, 158158/638794 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/invert_string.i_4.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_15-28-51-321.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/invert_string.i_4.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_15-28-51-321.csv Completed graceful shutdown