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/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 15:19:10,383 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 15:19:10,385 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 15:19:10,397 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 15:19:10,397 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 15:19:10,398 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 15:19:10,399 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 15:19:10,401 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 15:19:10,403 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 15:19:10,404 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 15:19:10,404 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 15:19:10,405 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 15:19:10,406 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 15:19:10,406 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 15:19:10,408 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 15:19:10,408 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 15:19:10,409 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 15:19:10,411 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 15:19:10,413 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 15:19:10,414 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 15:19:10,416 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 15:19:10,417 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 15:19:10,419 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-23 15:19:10,419 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 15:19:10,420 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 15:19:10,421 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 15:19:10,422 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 15:19:10,422 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 15:19:10,423 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 15:19:10,424 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 15:19:10,425 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 15:19:10,425 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-23 15:19:10,426 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-23 15:19:10,426 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-23 15:19:10,427 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-23 15:19:10,427 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-23 15:19:10,428 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 15:19:10,445 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 15:19:10,445 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 15:19:10,447 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 15:19:10,447 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 15:19:10,447 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 15:19:10,447 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 15:19:10,447 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 15:19:10,448 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 15:19:10,491 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 15:19:10,504 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 15:19:10,508 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 15:19:10,510 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 15:19:10,510 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 15:19:10,511 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-07-23 15:19:10,511 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-07-23 15:19:10,563 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 15:19:10,565 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 15:19:10,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 15:19:10,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 15:19:10,566 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 15:19:10,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:10" (1/1) ... [2018-07-23 15:19:10,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:10" (1/1) ... [2018-07-23 15:19:10,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:10" (1/1) ... [2018-07-23 15:19:10,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:10" (1/1) ... [2018-07-23 15:19:10,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:10" (1/1) ... [2018-07-23 15:19:10,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:10" (1/1) ... [2018-07-23 15:19:10,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:10" (1/1) ... [2018-07-23 15:19:10,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 15:19:10,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 15:19:10,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 15:19:10,616 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 15:19:10,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:10" (1/1) ... [2018-07-23 15:19:10,692 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-07-23 15:19:10,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 15:19:10,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 15:19:10,854 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 15:19:10,855 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:19:10 BoogieIcfgContainer [2018-07-23 15:19:10,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 15:19:10,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 15:19:10,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 15:19:10,860 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 15:19:10,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:10" (1/2) ... [2018-07-23 15:19:10,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b895c and model type down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 03:19:10, skipping insertion in model container [2018-07-23 15:19:10,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:19:10" (2/2) ... [2018-07-23 15:19:10,864 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-07-23 15:19:10,874 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 15:19:10,883 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 15:19:10,931 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 15:19:10,932 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 15:19:10,932 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 15:19:10,932 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 15:19:10,933 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 15:19:10,933 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 15:19:10,933 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 15:19:10,933 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 15:19:10,934 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 15:19:10,949 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-07-23 15:19:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-07-23 15:19:10,958 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:10,959 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-07-23 15:19:10,959 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:10,965 INFO L82 PathProgramCache]: Analyzing trace with hash 28868155, now seen corresponding path program 1 times [2018-07-23 15:19:10,972 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:11,051 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 15:19:11,054 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:19:11,055 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 15:19:11,060 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:19:11,076 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:19:11,077 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:19:11,080 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2018-07-23 15:19:11,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:11,127 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2018-07-23 15:19:11,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:19:11,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-07-23 15:19:11,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:11,144 INFO L225 Difference]: With dead ends: 13 [2018-07-23 15:19:11,145 INFO L226 Difference]: Without dead ends: 7 [2018-07-23 15:19:11,150 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 15:19:11,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-23 15:19:11,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-23 15:19:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-23 15:19:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-07-23 15:19:11,199 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-07-23 15:19:11,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:11,200 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-07-23 15:19:11,200 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:19:11,201 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-07-23 15:19:11,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 15:19:11,203 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:11,204 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-07-23 15:19:11,204 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:11,204 INFO L82 PathProgramCache]: Analyzing trace with hash 892360290, now seen corresponding path program 1 times [2018-07-23 15:19:11,205 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:11,267 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:19:11,268 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-23 15:19:11,273 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 15:19:11,276 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 15:19:11,276 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:19:11,276 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 5 states. [2018-07-23 15:19:11,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:11,364 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-07-23 15:19:11,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:19:11,365 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-07-23 15:19:11,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:11,367 INFO L225 Difference]: With dead ends: 15 [2018-07-23 15:19:11,368 INFO L226 Difference]: Without dead ends: 13 [2018-07-23 15:19:11,370 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:19:11,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-23 15:19:11,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-07-23 15:19:11,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 15:19:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-07-23 15:19:11,375 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-07-23 15:19:11,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:11,376 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-07-23 15:19:11,376 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 15:19:11,376 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-07-23 15:19:11,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-23 15:19:11,376 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:11,377 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-07-23 15:19:11,377 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:11,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1435154486, now seen corresponding path program 1 times [2018-07-23 15:19:11,378 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:11,431 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:11,431 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:19:11,431 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:19:11,432 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:19:11,432 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:19:11,435 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 6 states. [2018-07-23 15:19:11,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:11,487 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-07-23 15:19:11,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:19:11,487 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2018-07-23 15:19:11,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:11,488 INFO L225 Difference]: With dead ends: 17 [2018-07-23 15:19:11,488 INFO L226 Difference]: Without dead ends: 10 [2018-07-23 15:19:11,489 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:19:11,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-07-23 15:19:11,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-07-23 15:19:11,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-07-23 15:19:11,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-07-23 15:19:11,493 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-07-23 15:19:11,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:11,493 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-07-23 15:19:11,493 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:19:11,493 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-07-23 15:19:11,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-07-23 15:19:11,494 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:11,494 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2018-07-23 15:19:11,494 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:11,495 INFO L82 PathProgramCache]: Analyzing trace with hash 299903555, now seen corresponding path program 2 times [2018-07-23 15:19:11,495 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:11,539 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:11,539 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:19:11,540 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:19:11,540 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:19:11,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:19:11,541 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 6 states. [2018-07-23 15:19:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:11,593 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2018-07-23 15:19:11,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 15:19:11,594 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-07-23 15:19:11,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:11,595 INFO L225 Difference]: With dead ends: 18 [2018-07-23 15:19:11,595 INFO L226 Difference]: Without dead ends: 16 [2018-07-23 15:19:11,595 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:19:11,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-23 15:19:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-07-23 15:19:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-23 15:19:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-07-23 15:19:11,601 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2018-07-23 15:19:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:11,601 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-07-23 15:19:11,601 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:19:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-07-23 15:19:11,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-23 15:19:11,602 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:11,602 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2018-07-23 15:19:11,602 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:11,603 INFO L82 PathProgramCache]: Analyzing trace with hash 444573547, now seen corresponding path program 3 times [2018-07-23 15:19:11,603 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:11,639 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:11,640 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-23 15:19:11,640 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 15:19:11,641 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 15:19:11,642 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:19:11,642 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 8 states. [2018-07-23 15:19:11,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:11,725 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-07-23 15:19:11,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 15:19:11,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2018-07-23 15:19:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:11,728 INFO L225 Difference]: With dead ends: 22 [2018-07-23 15:19:11,729 INFO L226 Difference]: Without dead ends: 13 [2018-07-23 15:19:11,729 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:19:11,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-23 15:19:11,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-07-23 15:19:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-07-23 15:19:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-07-23 15:19:11,737 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2018-07-23 15:19:11,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:11,737 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-07-23 15:19:11,739 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 15:19:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-07-23 15:19:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-07-23 15:19:11,740 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:11,740 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2018-07-23 15:19:11,740 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:11,740 INFO L82 PathProgramCache]: Analyzing trace with hash -372734382, now seen corresponding path program 4 times [2018-07-23 15:19:11,741 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:11,807 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:11,808 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-23 15:19:11,808 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 15:19:11,808 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 15:19:11,809 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:19:11,809 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-07-23 15:19:11,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:11,857 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-07-23 15:19:11,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 15:19:11,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-07-23 15:19:11,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:11,859 INFO L225 Difference]: With dead ends: 21 [2018-07-23 15:19:11,859 INFO L226 Difference]: Without dead ends: 19 [2018-07-23 15:19:11,861 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:19:11,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-07-23 15:19:11,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-07-23 15:19:11,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-07-23 15:19:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-07-23 15:19:11,870 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-07-23 15:19:11,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:11,873 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-07-23 15:19:11,874 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 15:19:11,874 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-07-23 15:19:11,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-23 15:19:11,874 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:11,875 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1] [2018-07-23 15:19:11,875 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:11,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1715389510, now seen corresponding path program 5 times [2018-07-23 15:19:11,878 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:11,920 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:11,920 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 15:19:11,921 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 15:19:11,921 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 15:19:11,922 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:19:11,922 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 10 states. [2018-07-23 15:19:12,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:12,007 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-07-23 15:19:12,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 15:19:12,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2018-07-23 15:19:12,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:12,008 INFO L225 Difference]: With dead ends: 27 [2018-07-23 15:19:12,008 INFO L226 Difference]: Without dead ends: 16 [2018-07-23 15:19:12,009 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:19:12,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-23 15:19:12,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-07-23 15:19:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-23 15:19:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-07-23 15:19:12,015 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2018-07-23 15:19:12,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:12,015 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-07-23 15:19:12,015 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 15:19:12,015 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-07-23 15:19:12,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-23 15:19:12,016 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:12,016 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1] [2018-07-23 15:19:12,017 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:12,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1966301325, now seen corresponding path program 6 times [2018-07-23 15:19:12,017 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:12,049 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:12,049 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-23 15:19:12,049 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 15:19:12,050 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 15:19:12,050 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:19:12,050 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-07-23 15:19:12,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:12,092 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-07-23 15:19:12,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 15:19:12,092 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-07-23 15:19:12,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:12,093 INFO L225 Difference]: With dead ends: 24 [2018-07-23 15:19:12,093 INFO L226 Difference]: Without dead ends: 22 [2018-07-23 15:19:12,094 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:19:12,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-07-23 15:19:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2018-07-23 15:19:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-23 15:19:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-07-23 15:19:12,100 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2018-07-23 15:19:12,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:12,100 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-07-23 15:19:12,101 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 15:19:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-07-23 15:19:12,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-23 15:19:12,102 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:12,102 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1] [2018-07-23 15:19:12,102 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:12,102 INFO L82 PathProgramCache]: Analyzing trace with hash 170102939, now seen corresponding path program 7 times [2018-07-23 15:19:12,103 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:12,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:12,152 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:12,152 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-23 15:19:12,153 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 15:19:12,153 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 15:19:12,153 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:19:12,154 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2018-07-23 15:19:12,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:12,236 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-07-23 15:19:12,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 15:19:12,236 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2018-07-23 15:19:12,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:12,238 INFO L225 Difference]: With dead ends: 32 [2018-07-23 15:19:12,239 INFO L226 Difference]: Without dead ends: 19 [2018-07-23 15:19:12,239 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:19:12,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-07-23 15:19:12,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-07-23 15:19:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-07-23 15:19:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-07-23 15:19:12,245 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2018-07-23 15:19:12,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:12,246 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-07-23 15:19:12,246 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 15:19:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-07-23 15:19:12,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-07-23 15:19:12,247 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:12,247 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1] [2018-07-23 15:19:12,247 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:12,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1500682686, now seen corresponding path program 8 times [2018-07-23 15:19:12,248 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:12,286 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:12,287 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-23 15:19:12,287 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 15:19:12,289 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 15:19:12,289 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:19:12,289 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 9 states. [2018-07-23 15:19:12,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:12,367 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-07-23 15:19:12,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 15:19:12,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2018-07-23 15:19:12,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:12,368 INFO L225 Difference]: With dead ends: 27 [2018-07-23 15:19:12,368 INFO L226 Difference]: Without dead ends: 25 [2018-07-23 15:19:12,369 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:19:12,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-07-23 15:19:12,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2018-07-23 15:19:12,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-07-23 15:19:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-07-23 15:19:12,375 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-07-23 15:19:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:12,375 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-07-23 15:19:12,375 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 15:19:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-07-23 15:19:12,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-23 15:19:12,376 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:12,376 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1] [2018-07-23 15:19:12,377 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:12,377 INFO L82 PathProgramCache]: Analyzing trace with hash 953016234, now seen corresponding path program 9 times [2018-07-23 15:19:12,377 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:12,434 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:12,434 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-23 15:19:12,434 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 15:19:12,435 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 15:19:12,435 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:19:12,437 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 14 states. [2018-07-23 15:19:12,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:12,495 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2018-07-23 15:19:12,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 15:19:12,496 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2018-07-23 15:19:12,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:12,497 INFO L225 Difference]: With dead ends: 37 [2018-07-23 15:19:12,497 INFO L226 Difference]: Without dead ends: 22 [2018-07-23 15:19:12,498 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:19:12,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-07-23 15:19:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-07-23 15:19:12,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-23 15:19:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-07-23 15:19:12,503 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-07-23 15:19:12,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:12,504 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-07-23 15:19:12,504 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 15:19:12,505 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-07-23 15:19:12,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-23 15:19:12,505 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:12,506 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1] [2018-07-23 15:19:12,506 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:12,506 INFO L82 PathProgramCache]: Analyzing trace with hash 954455203, now seen corresponding path program 10 times [2018-07-23 15:19:12,507 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:12,554 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:12,554 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 15:19:12,555 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 15:19:12,555 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 15:19:12,555 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:19:12,556 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 10 states. [2018-07-23 15:19:12,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:12,605 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-07-23 15:19:12,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 15:19:12,608 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2018-07-23 15:19:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:12,610 INFO L225 Difference]: With dead ends: 30 [2018-07-23 15:19:12,610 INFO L226 Difference]: Without dead ends: 28 [2018-07-23 15:19:12,611 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:19:12,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-07-23 15:19:12,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2018-07-23 15:19:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-23 15:19:12,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-07-23 15:19:12,621 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2018-07-23 15:19:12,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:12,621 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-07-23 15:19:12,621 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 15:19:12,621 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-07-23 15:19:12,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-23 15:19:12,622 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:12,622 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1] [2018-07-23 15:19:12,623 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:12,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1891485237, now seen corresponding path program 11 times [2018-07-23 15:19:12,623 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:12,697 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:12,698 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-23 15:19:12,698 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 15:19:12,698 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 15:19:12,699 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:19:12,699 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 16 states. [2018-07-23 15:19:12,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:12,770 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-07-23 15:19:12,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 15:19:12,770 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2018-07-23 15:19:12,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:12,771 INFO L225 Difference]: With dead ends: 42 [2018-07-23 15:19:12,772 INFO L226 Difference]: Without dead ends: 25 [2018-07-23 15:19:12,776 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:19:12,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-07-23 15:19:12,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-07-23 15:19:12,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-23 15:19:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-07-23 15:19:12,786 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2018-07-23 15:19:12,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:12,786 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-07-23 15:19:12,786 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 15:19:12,787 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-07-23 15:19:12,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-07-23 15:19:12,789 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:12,789 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1] [2018-07-23 15:19:12,790 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:12,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1972832718, now seen corresponding path program 12 times [2018-07-23 15:19:12,791 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:12,838 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:12,839 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-23 15:19:12,839 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 15:19:12,840 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 15:19:12,840 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:19:12,840 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-07-23 15:19:12,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:12,898 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-07-23 15:19:12,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 15:19:12,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-07-23 15:19:12,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:12,905 INFO L225 Difference]: With dead ends: 33 [2018-07-23 15:19:12,905 INFO L226 Difference]: Without dead ends: 31 [2018-07-23 15:19:12,906 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:19:12,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-07-23 15:19:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-07-23 15:19:12,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-07-23 15:19:12,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-07-23 15:19:12,920 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-07-23 15:19:12,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:12,921 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-07-23 15:19:12,921 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 15:19:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-07-23 15:19:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-23 15:19:12,922 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:12,922 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1] [2018-07-23 15:19:12,923 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:12,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1811598438, now seen corresponding path program 13 times [2018-07-23 15:19:12,923 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 56 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:12,988 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:12,988 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-07-23 15:19:12,989 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 15:19:12,990 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 15:19:12,990 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:19:12,991 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 18 states. [2018-07-23 15:19:13,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:13,078 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-07-23 15:19:13,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 15:19:13,079 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2018-07-23 15:19:13,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:13,080 INFO L225 Difference]: With dead ends: 47 [2018-07-23 15:19:13,081 INFO L226 Difference]: Without dead ends: 28 [2018-07-23 15:19:13,082 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:19:13,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-07-23 15:19:13,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-07-23 15:19:13,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-23 15:19:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-07-23 15:19:13,091 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2018-07-23 15:19:13,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:13,092 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-07-23 15:19:13,092 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 15:19:13,092 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-07-23 15:19:13,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-23 15:19:13,094 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:13,094 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1] [2018-07-23 15:19:13,094 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:13,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1422117331, now seen corresponding path program 14 times [2018-07-23 15:19:13,095 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 36 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:13,159 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:13,159 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-23 15:19:13,159 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 15:19:13,160 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 15:19:13,160 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:19:13,160 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2018-07-23 15:19:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:13,216 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-07-23 15:19:13,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 15:19:13,221 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-07-23 15:19:13,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:13,222 INFO L225 Difference]: With dead ends: 36 [2018-07-23 15:19:13,222 INFO L226 Difference]: Without dead ends: 34 [2018-07-23 15:19:13,223 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:19:13,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-07-23 15:19:13,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2018-07-23 15:19:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-07-23 15:19:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-07-23 15:19:13,231 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2018-07-23 15:19:13,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:13,232 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-07-23 15:19:13,232 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 15:19:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-07-23 15:19:13,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-07-23 15:19:13,233 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:13,233 INFO L353 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1] [2018-07-23 15:19:13,234 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:13,234 INFO L82 PathProgramCache]: Analyzing trace with hash 855220987, now seen corresponding path program 15 times [2018-07-23 15:19:13,234 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 72 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:13,311 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:13,312 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-07-23 15:19:13,312 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 15:19:13,312 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 15:19:13,313 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:19:13,313 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 20 states. [2018-07-23 15:19:13,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:13,407 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-07-23 15:19:13,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 15:19:13,407 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2018-07-23 15:19:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:13,408 INFO L225 Difference]: With dead ends: 52 [2018-07-23 15:19:13,408 INFO L226 Difference]: Without dead ends: 31 [2018-07-23 15:19:13,409 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:19:13,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-07-23 15:19:13,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-07-23 15:19:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-07-23 15:19:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-07-23 15:19:13,421 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2018-07-23 15:19:13,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:13,422 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-07-23 15:19:13,422 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 15:19:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-07-23 15:19:13,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-23 15:19:13,423 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:13,423 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1] [2018-07-23 15:19:13,423 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:13,426 INFO L82 PathProgramCache]: Analyzing trace with hash 365245986, now seen corresponding path program 16 times [2018-07-23 15:19:13,426 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 45 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:13,479 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:13,479 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-07-23 15:19:13,480 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 15:19:13,480 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 15:19:13,481 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:19:13,481 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 13 states. [2018-07-23 15:19:13,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:13,542 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-07-23 15:19:13,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 15:19:13,543 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2018-07-23 15:19:13,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:13,543 INFO L225 Difference]: With dead ends: 39 [2018-07-23 15:19:13,544 INFO L226 Difference]: Without dead ends: 37 [2018-07-23 15:19:13,544 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:19:13,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-07-23 15:19:13,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2018-07-23 15:19:13,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-07-23 15:19:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-07-23 15:19:13,561 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-07-23 15:19:13,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:13,562 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-07-23 15:19:13,562 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 15:19:13,562 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-07-23 15:19:13,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-23 15:19:13,564 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:13,564 INFO L353 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1] [2018-07-23 15:19:13,565 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:13,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1185859702, now seen corresponding path program 17 times [2018-07-23 15:19:13,565 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 90 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:13,640 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:13,640 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-07-23 15:19:13,641 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 15:19:13,641 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 15:19:13,642 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:19:13,642 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 22 states. [2018-07-23 15:19:13,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:13,746 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-07-23 15:19:13,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 15:19:13,747 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2018-07-23 15:19:13,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:13,748 INFO L225 Difference]: With dead ends: 57 [2018-07-23 15:19:13,748 INFO L226 Difference]: Without dead ends: 34 [2018-07-23 15:19:13,749 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:19:13,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-07-23 15:19:13,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-07-23 15:19:13,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-07-23 15:19:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-07-23 15:19:13,764 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2018-07-23 15:19:13,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:13,764 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-07-23 15:19:13,764 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 15:19:13,764 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-07-23 15:19:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-07-23 15:19:13,765 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:13,765 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1] [2018-07-23 15:19:13,768 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:13,768 INFO L82 PathProgramCache]: Analyzing trace with hash 562724611, now seen corresponding path program 18 times [2018-07-23 15:19:13,768 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 55 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:13,833 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:13,833 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-23 15:19:13,833 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 15:19:13,834 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 15:19:13,834 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:19:13,834 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 14 states. [2018-07-23 15:19:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:13,899 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2018-07-23 15:19:13,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 15:19:13,899 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2018-07-23 15:19:13,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:13,900 INFO L225 Difference]: With dead ends: 42 [2018-07-23 15:19:13,900 INFO L226 Difference]: Without dead ends: 40 [2018-07-23 15:19:13,901 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:19:13,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-07-23 15:19:13,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2018-07-23 15:19:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-23 15:19:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-07-23 15:19:13,910 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2018-07-23 15:19:13,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:13,910 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-07-23 15:19:13,910 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 15:19:13,910 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-07-23 15:19:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-23 15:19:13,911 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:13,911 INFO L353 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1] [2018-07-23 15:19:13,913 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:13,914 INFO L82 PathProgramCache]: Analyzing trace with hash -387462101, now seen corresponding path program 19 times [2018-07-23 15:19:13,914 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 110 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:13,997 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:13,997 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-07-23 15:19:13,998 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 15:19:13,998 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 15:19:13,999 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:19:13,999 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 24 states. [2018-07-23 15:19:14,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:14,104 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-07-23 15:19:14,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 15:19:14,104 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2018-07-23 15:19:14,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:14,105 INFO L225 Difference]: With dead ends: 62 [2018-07-23 15:19:14,105 INFO L226 Difference]: Without dead ends: 37 [2018-07-23 15:19:14,106 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:19:14,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-07-23 15:19:14,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-07-23 15:19:14,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-07-23 15:19:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-07-23 15:19:14,114 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2018-07-23 15:19:14,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:14,115 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-07-23 15:19:14,115 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 15:19:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-07-23 15:19:14,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-07-23 15:19:14,116 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:14,116 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1] [2018-07-23 15:19:14,116 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:14,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1970526702, now seen corresponding path program 20 times [2018-07-23 15:19:14,117 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 66 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:14,177 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:14,178 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-07-23 15:19:14,178 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 15:19:14,180 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 15:19:14,180 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:19:14,180 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 15 states. [2018-07-23 15:19:14,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:14,244 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-07-23 15:19:14,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 15:19:14,244 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2018-07-23 15:19:14,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:14,245 INFO L225 Difference]: With dead ends: 45 [2018-07-23 15:19:14,245 INFO L226 Difference]: Without dead ends: 43 [2018-07-23 15:19:14,246 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:19:14,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-07-23 15:19:14,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-07-23 15:19:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-07-23 15:19:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-07-23 15:19:14,262 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-07-23 15:19:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:14,262 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-07-23 15:19:14,262 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 15:19:14,263 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-07-23 15:19:14,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-23 15:19:14,263 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:14,263 INFO L353 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1] [2018-07-23 15:19:14,264 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:14,264 INFO L82 PathProgramCache]: Analyzing trace with hash 404482938, now seen corresponding path program 21 times [2018-07-23 15:19:14,264 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 132 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:14,351 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:14,351 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-07-23 15:19:14,351 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 15:19:14,352 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 15:19:14,352 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:19:14,353 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 26 states. [2018-07-23 15:19:14,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:14,475 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-07-23 15:19:14,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 15:19:14,475 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 38 [2018-07-23 15:19:14,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:14,476 INFO L225 Difference]: With dead ends: 67 [2018-07-23 15:19:14,476 INFO L226 Difference]: Without dead ends: 40 [2018-07-23 15:19:14,478 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:19:14,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-07-23 15:19:14,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-07-23 15:19:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-23 15:19:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-07-23 15:19:14,493 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2018-07-23 15:19:14,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:14,493 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-07-23 15:19:14,494 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 15:19:14,494 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-07-23 15:19:14,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-23 15:19:14,494 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:14,495 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1] [2018-07-23 15:19:14,495 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:14,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1932135373, now seen corresponding path program 22 times [2018-07-23 15:19:14,495 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 78 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:14,581 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:14,581 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-23 15:19:14,581 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 15:19:14,581 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 15:19:14,582 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:19:14,582 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 16 states. [2018-07-23 15:19:14,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:14,652 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2018-07-23 15:19:14,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 15:19:14,653 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2018-07-23 15:19:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:14,653 INFO L225 Difference]: With dead ends: 48 [2018-07-23 15:19:14,654 INFO L226 Difference]: Without dead ends: 46 [2018-07-23 15:19:14,655 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:19:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-07-23 15:19:14,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2018-07-23 15:19:14,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-07-23 15:19:14,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-07-23 15:19:14,662 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2018-07-23 15:19:14,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:14,662 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-07-23 15:19:14,663 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 15:19:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-07-23 15:19:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-07-23 15:19:14,663 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:14,663 INFO L353 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1] [2018-07-23 15:19:14,664 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:14,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1356155557, now seen corresponding path program 23 times [2018-07-23 15:19:14,664 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 156 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:14,769 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:14,769 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-07-23 15:19:14,770 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 15:19:14,770 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 15:19:14,771 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:19:14,771 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 28 states. [2018-07-23 15:19:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:14,905 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-07-23 15:19:14,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 15:19:14,905 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 41 [2018-07-23 15:19:14,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:14,906 INFO L225 Difference]: With dead ends: 72 [2018-07-23 15:19:14,906 INFO L226 Difference]: Without dead ends: 43 [2018-07-23 15:19:14,908 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:19:14,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-07-23 15:19:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-07-23 15:19:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-07-23 15:19:14,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-07-23 15:19:14,916 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 41 [2018-07-23 15:19:14,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:14,916 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-07-23 15:19:14,916 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 15:19:14,917 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-07-23 15:19:14,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-07-23 15:19:14,917 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:14,920 INFO L353 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1] [2018-07-23 15:19:14,920 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:14,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1277675010, now seen corresponding path program 24 times [2018-07-23 15:19:14,921 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 91 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:14,993 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:14,993 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-07-23 15:19:14,993 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 15:19:14,994 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 15:19:14,994 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:19:14,995 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 17 states. [2018-07-23 15:19:15,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:15,139 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-07-23 15:19:15,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 15:19:15,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2018-07-23 15:19:15,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:15,140 INFO L225 Difference]: With dead ends: 51 [2018-07-23 15:19:15,141 INFO L226 Difference]: Without dead ends: 49 [2018-07-23 15:19:15,141 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:19:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-07-23 15:19:15,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2018-07-23 15:19:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-07-23 15:19:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-07-23 15:19:15,155 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-07-23 15:19:15,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:15,155 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-07-23 15:19:15,155 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 15:19:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-07-23 15:19:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-23 15:19:15,156 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:15,156 INFO L353 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1] [2018-07-23 15:19:15,156 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:15,156 INFO L82 PathProgramCache]: Analyzing trace with hash -514896022, now seen corresponding path program 25 times [2018-07-23 15:19:15,156 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 182 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:15,256 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:15,256 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-07-23 15:19:15,256 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 15:19:15,257 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 15:19:15,257 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:19:15,258 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 30 states. [2018-07-23 15:19:15,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:15,414 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-07-23 15:19:15,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 15:19:15,415 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 44 [2018-07-23 15:19:15,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:15,415 INFO L225 Difference]: With dead ends: 77 [2018-07-23 15:19:15,416 INFO L226 Difference]: Without dead ends: 46 [2018-07-23 15:19:15,417 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:19:15,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-07-23 15:19:15,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-07-23 15:19:15,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-07-23 15:19:15,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-07-23 15:19:15,425 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-07-23 15:19:15,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:15,425 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-07-23 15:19:15,426 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 15:19:15,426 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-07-23 15:19:15,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-07-23 15:19:15,426 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:15,426 INFO L353 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1] [2018-07-23 15:19:15,426 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:15,427 INFO L82 PathProgramCache]: Analyzing trace with hash -826005149, now seen corresponding path program 26 times [2018-07-23 15:19:15,427 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 105 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:15,495 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:15,495 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-07-23 15:19:15,495 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 15:19:15,495 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 15:19:15,496 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:19:15,496 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 18 states. [2018-07-23 15:19:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:15,567 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2018-07-23 15:19:15,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 15:19:15,567 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2018-07-23 15:19:15,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:15,568 INFO L225 Difference]: With dead ends: 54 [2018-07-23 15:19:15,568 INFO L226 Difference]: Without dead ends: 52 [2018-07-23 15:19:15,569 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:19:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-07-23 15:19:15,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2018-07-23 15:19:15,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-07-23 15:19:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-07-23 15:19:15,577 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2018-07-23 15:19:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:15,577 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-07-23 15:19:15,577 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 15:19:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-07-23 15:19:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-07-23 15:19:15,579 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:15,579 INFO L353 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1] [2018-07-23 15:19:15,579 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:15,579 INFO L82 PathProgramCache]: Analyzing trace with hash 778067595, now seen corresponding path program 27 times [2018-07-23 15:19:15,579 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 210 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:15,695 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:15,695 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-07-23 15:19:15,695 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 15:19:15,696 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 15:19:15,696 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:19:15,697 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 32 states. [2018-07-23 15:19:15,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:15,853 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2018-07-23 15:19:15,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 15:19:15,854 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 47 [2018-07-23 15:19:15,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:15,854 INFO L225 Difference]: With dead ends: 82 [2018-07-23 15:19:15,854 INFO L226 Difference]: Without dead ends: 49 [2018-07-23 15:19:15,857 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=541, Invalid=1621, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:19:15,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-07-23 15:19:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-07-23 15:19:15,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-07-23 15:19:15,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-07-23 15:19:15,863 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2018-07-23 15:19:15,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:15,864 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-07-23 15:19:15,864 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 15:19:15,864 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-07-23 15:19:15,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-07-23 15:19:15,864 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:15,864 INFO L353 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1] [2018-07-23 15:19:15,865 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:15,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1065489906, now seen corresponding path program 28 times [2018-07-23 15:19:15,865 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 120 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:15,941 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:15,941 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-07-23 15:19:15,942 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 15:19:15,942 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 15:19:15,942 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:19:15,943 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 19 states. [2018-07-23 15:19:16,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:16,016 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-07-23 15:19:16,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 15:19:16,016 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2018-07-23 15:19:16,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:16,017 INFO L225 Difference]: With dead ends: 57 [2018-07-23 15:19:16,017 INFO L226 Difference]: Without dead ends: 55 [2018-07-23 15:19:16,019 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:19:16,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-07-23 15:19:16,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-07-23 15:19:16,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-07-23 15:19:16,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-07-23 15:19:16,025 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-07-23 15:19:16,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:16,025 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-07-23 15:19:16,025 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 15:19:16,026 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-07-23 15:19:16,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-23 15:19:16,026 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:16,026 INFO L353 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1] [2018-07-23 15:19:16,026 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:16,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1733649242, now seen corresponding path program 29 times [2018-07-23 15:19:16,027 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 240 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:16,127 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:16,127 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-07-23 15:19:16,128 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 15:19:16,128 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 15:19:16,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:19:16,129 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 34 states. [2018-07-23 15:19:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:16,277 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-07-23 15:19:16,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 15:19:16,277 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 50 [2018-07-23 15:19:16,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:16,278 INFO L225 Difference]: With dead ends: 87 [2018-07-23 15:19:16,278 INFO L226 Difference]: Without dead ends: 52 [2018-07-23 15:19:16,279 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=609, Invalid=1841, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:19:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-07-23 15:19:16,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-07-23 15:19:16,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-07-23 15:19:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-07-23 15:19:16,285 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2018-07-23 15:19:16,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:16,286 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-07-23 15:19:16,286 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 15:19:16,286 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-07-23 15:19:16,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-07-23 15:19:16,286 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:16,286 INFO L353 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1] [2018-07-23 15:19:16,287 INFO L414 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:16,287 INFO L82 PathProgramCache]: Analyzing trace with hash 166928019, now seen corresponding path program 30 times [2018-07-23 15:19:16,287 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 136 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:16,352 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:16,352 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-07-23 15:19:16,352 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 15:19:16,352 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 15:19:16,353 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:19:16,353 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 20 states. [2018-07-23 15:19:16,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:16,422 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2018-07-23 15:19:16,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 15:19:16,423 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2018-07-23 15:19:16,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:16,423 INFO L225 Difference]: With dead ends: 60 [2018-07-23 15:19:16,423 INFO L226 Difference]: Without dead ends: 58 [2018-07-23 15:19:16,424 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:19:16,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-07-23 15:19:16,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-07-23 15:19:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-07-23 15:19:16,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-07-23 15:19:16,431 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2018-07-23 15:19:16,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:16,431 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-07-23 15:19:16,431 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 15:19:16,431 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-07-23 15:19:16,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-07-23 15:19:16,432 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:16,432 INFO L353 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1] [2018-07-23 15:19:16,432 INFO L414 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:16,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1504102331, now seen corresponding path program 31 times [2018-07-23 15:19:16,432 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 272 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:16,545 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:16,546 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-07-23 15:19:16,546 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 15:19:16,546 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 15:19:16,547 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:19:16,547 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 36 states. [2018-07-23 15:19:16,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:16,712 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-07-23 15:19:16,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 15:19:16,712 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 53 [2018-07-23 15:19:16,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:16,713 INFO L225 Difference]: With dead ends: 92 [2018-07-23 15:19:16,713 INFO L226 Difference]: Without dead ends: 55 [2018-07-23 15:19:16,715 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:19:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-07-23 15:19:16,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-07-23 15:19:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-07-23 15:19:16,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-07-23 15:19:16,723 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 53 [2018-07-23 15:19:16,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:16,724 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-07-23 15:19:16,724 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 15:19:16,724 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-07-23 15:19:16,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-07-23 15:19:16,724 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:16,725 INFO L353 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1] [2018-07-23 15:19:16,725 INFO L414 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:16,725 INFO L82 PathProgramCache]: Analyzing trace with hash 721753570, now seen corresponding path program 32 times [2018-07-23 15:19:16,725 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:16,808 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:16,808 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-07-23 15:19:16,808 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 15:19:16,809 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 15:19:16,809 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:19:16,809 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 21 states. [2018-07-23 15:19:16,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:16,890 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-07-23 15:19:16,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 15:19:16,890 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 54 [2018-07-23 15:19:16,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:16,891 INFO L225 Difference]: With dead ends: 63 [2018-07-23 15:19:16,891 INFO L226 Difference]: Without dead ends: 61 [2018-07-23 15:19:16,892 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:19:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-07-23 15:19:16,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2018-07-23 15:19:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-07-23 15:19:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-07-23 15:19:16,899 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-07-23 15:19:16,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:16,900 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-07-23 15:19:16,900 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 15:19:16,900 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-07-23 15:19:16,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 15:19:16,900 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:16,900 INFO L353 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1] [2018-07-23 15:19:16,901 INFO L414 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:16,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2115512138, now seen corresponding path program 33 times [2018-07-23 15:19:16,901 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 306 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:17,014 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:17,014 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-07-23 15:19:17,015 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 15:19:17,015 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 15:19:17,016 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:19:17,016 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 38 states. [2018-07-23 15:19:17,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:17,198 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2018-07-23 15:19:17,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 15:19:17,199 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 56 [2018-07-23 15:19:17,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:17,199 INFO L225 Difference]: With dead ends: 97 [2018-07-23 15:19:17,199 INFO L226 Difference]: Without dead ends: 58 [2018-07-23 15:19:17,202 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=757, Invalid=2323, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:19:17,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-07-23 15:19:17,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-07-23 15:19:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-07-23 15:19:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-07-23 15:19:17,210 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2018-07-23 15:19:17,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:17,210 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-07-23 15:19:17,211 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 15:19:17,211 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-07-23 15:19:17,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-07-23 15:19:17,211 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:17,211 INFO L353 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1] [2018-07-23 15:19:17,212 INFO L414 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:17,212 INFO L82 PathProgramCache]: Analyzing trace with hash -343878717, now seen corresponding path program 34 times [2018-07-23 15:19:17,212 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 171 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:17,291 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:17,291 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-07-23 15:19:17,292 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 15:19:17,292 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 15:19:17,292 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:19:17,293 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 22 states. [2018-07-23 15:19:17,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:17,378 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2018-07-23 15:19:17,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 15:19:17,379 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2018-07-23 15:19:17,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:17,380 INFO L225 Difference]: With dead ends: 66 [2018-07-23 15:19:17,380 INFO L226 Difference]: Without dead ends: 64 [2018-07-23 15:19:17,381 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:19:17,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-07-23 15:19:17,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2018-07-23 15:19:17,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-07-23 15:19:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-07-23 15:19:17,389 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2018-07-23 15:19:17,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:17,389 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-07-23 15:19:17,390 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 15:19:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-07-23 15:19:17,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-07-23 15:19:17,390 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:17,390 INFO L353 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1] [2018-07-23 15:19:17,391 INFO L414 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:17,391 INFO L82 PathProgramCache]: Analyzing trace with hash 245100779, now seen corresponding path program 35 times [2018-07-23 15:19:17,391 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 342 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:17,570 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:17,570 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-07-23 15:19:17,571 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 15:19:17,571 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 15:19:17,573 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:19:17,574 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 40 states. [2018-07-23 15:19:17,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:17,806 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-07-23 15:19:17,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 15:19:17,806 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 59 [2018-07-23 15:19:17,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:17,807 INFO L225 Difference]: With dead ends: 102 [2018-07-23 15:19:17,807 INFO L226 Difference]: Without dead ends: 61 [2018-07-23 15:19:17,809 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:19:17,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-07-23 15:19:17,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-07-23 15:19:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-07-23 15:19:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-07-23 15:19:17,821 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2018-07-23 15:19:17,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:17,821 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-07-23 15:19:17,822 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 15:19:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-07-23 15:19:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-07-23 15:19:17,822 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:17,823 INFO L353 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1] [2018-07-23 15:19:17,823 INFO L414 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash 379241938, now seen corresponding path program 36 times [2018-07-23 15:19:17,823 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 190 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:17,950 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:17,950 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-07-23 15:19:17,950 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 15:19:17,951 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 15:19:17,951 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:19:17,951 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 23 states. [2018-07-23 15:19:18,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:18,096 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-07-23 15:19:18,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 15:19:18,096 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2018-07-23 15:19:18,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:18,097 INFO L225 Difference]: With dead ends: 69 [2018-07-23 15:19:18,097 INFO L226 Difference]: Without dead ends: 67 [2018-07-23 15:19:18,099 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:19:18,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-07-23 15:19:18,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-07-23 15:19:18,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-07-23 15:19:18,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-07-23 15:19:18,107 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-07-23 15:19:18,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:18,108 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-07-23 15:19:18,108 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 15:19:18,108 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-07-23 15:19:18,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 15:19:18,109 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:18,109 INFO L353 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1] [2018-07-23 15:19:18,109 INFO L414 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:18,109 INFO L82 PathProgramCache]: Analyzing trace with hash -620651718, now seen corresponding path program 37 times [2018-07-23 15:19:18,109 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 380 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:18,266 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:18,266 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-07-23 15:19:18,266 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 15:19:18,266 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 15:19:18,267 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:19:18,268 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 42 states. [2018-07-23 15:19:18,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:18,393 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-07-23 15:19:18,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 15:19:18,393 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 62 [2018-07-23 15:19:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:18,394 INFO L225 Difference]: With dead ends: 107 [2018-07-23 15:19:18,394 INFO L226 Difference]: Without dead ends: 64 [2018-07-23 15:19:18,396 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=921, Invalid=2861, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:19:18,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-07-23 15:19:18,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-07-23 15:19:18,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-07-23 15:19:18,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-07-23 15:19:18,404 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2018-07-23 15:19:18,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:18,405 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-07-23 15:19:18,405 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 15:19:18,405 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-07-23 15:19:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-07-23 15:19:18,405 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:18,405 INFO L353 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1] [2018-07-23 15:19:18,406 INFO L414 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:18,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1259030771, now seen corresponding path program 38 times [2018-07-23 15:19:18,406 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 210 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:18,516 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:18,516 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-07-23 15:19:18,516 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 15:19:18,517 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 15:19:18,517 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:19:18,517 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 24 states. [2018-07-23 15:19:18,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:18,616 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2018-07-23 15:19:18,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 15:19:18,617 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 63 [2018-07-23 15:19:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:18,618 INFO L225 Difference]: With dead ends: 72 [2018-07-23 15:19:18,618 INFO L226 Difference]: Without dead ends: 70 [2018-07-23 15:19:18,619 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:19:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-07-23 15:19:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2018-07-23 15:19:18,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-07-23 15:19:18,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-07-23 15:19:18,629 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2018-07-23 15:19:18,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:18,630 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-07-23 15:19:18,630 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 15:19:18,630 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-07-23 15:19:18,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-07-23 15:19:18,631 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:18,631 INFO L353 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1] [2018-07-23 15:19:18,631 INFO L414 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:18,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1252140517, now seen corresponding path program 39 times [2018-07-23 15:19:18,633 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 420 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:18,800 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:18,801 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-07-23 15:19:18,801 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 15:19:18,801 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 15:19:18,802 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:19:18,802 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 44 states. [2018-07-23 15:19:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:19,050 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2018-07-23 15:19:19,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 15:19:19,051 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 65 [2018-07-23 15:19:19,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:19,051 INFO L225 Difference]: With dead ends: 112 [2018-07-23 15:19:19,052 INFO L226 Difference]: Without dead ends: 67 [2018-07-23 15:19:19,053 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1009, Invalid=3151, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:19:19,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-07-23 15:19:19,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-07-23 15:19:19,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-07-23 15:19:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-07-23 15:19:19,062 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 65 [2018-07-23 15:19:19,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:19,062 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-07-23 15:19:19,062 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 15:19:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-07-23 15:19:19,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-07-23 15:19:19,063 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:19,063 INFO L353 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1] [2018-07-23 15:19:19,063 INFO L414 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:19,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1414715966, now seen corresponding path program 40 times [2018-07-23 15:19:19,064 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 231 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:19,178 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:19,178 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-07-23 15:19:19,178 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 15:19:19,178 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 15:19:19,179 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:19:19,179 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 25 states. [2018-07-23 15:19:19,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:19,282 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-07-23 15:19:19,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 15:19:19,282 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 66 [2018-07-23 15:19:19,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:19,283 INFO L225 Difference]: With dead ends: 75 [2018-07-23 15:19:19,283 INFO L226 Difference]: Without dead ends: 73 [2018-07-23 15:19:19,284 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:19:19,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-07-23 15:19:19,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-07-23 15:19:19,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-07-23 15:19:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-07-23 15:19:19,293 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-07-23 15:19:19,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:19,293 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-07-23 15:19:19,294 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 15:19:19,294 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-07-23 15:19:19,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 15:19:19,294 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:19,295 INFO L353 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1] [2018-07-23 15:19:19,295 INFO L414 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:19,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1962655530, now seen corresponding path program 41 times [2018-07-23 15:19:19,295 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 462 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:19,449 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:19,449 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-07-23 15:19:19,450 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 15:19:19,450 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 15:19:19,451 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:19:19,451 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 46 states. [2018-07-23 15:19:19,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:19,699 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-07-23 15:19:19,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 15:19:19,700 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 68 [2018-07-23 15:19:19,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:19,700 INFO L225 Difference]: With dead ends: 117 [2018-07-23 15:19:19,701 INFO L226 Difference]: Without dead ends: 70 [2018-07-23 15:19:19,702 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1101, Invalid=3455, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:19:19,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-07-23 15:19:19,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-07-23 15:19:19,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-07-23 15:19:19,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-07-23 15:19:19,714 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2018-07-23 15:19:19,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:19,714 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-07-23 15:19:19,714 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 15:19:19,714 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-07-23 15:19:19,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-07-23 15:19:19,715 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:19,715 INFO L353 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1] [2018-07-23 15:19:19,715 INFO L414 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash -894403037, now seen corresponding path program 42 times [2018-07-23 15:19:19,716 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 253 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:19,808 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:19,809 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-07-23 15:19:19,809 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 15:19:19,809 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 15:19:19,810 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:19:19,810 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 26 states. [2018-07-23 15:19:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:19,907 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2018-07-23 15:19:19,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 15:19:19,907 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 69 [2018-07-23 15:19:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:19,908 INFO L225 Difference]: With dead ends: 78 [2018-07-23 15:19:19,908 INFO L226 Difference]: Without dead ends: 76 [2018-07-23 15:19:19,909 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:19:19,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-07-23 15:19:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2018-07-23 15:19:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-07-23 15:19:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-07-23 15:19:19,918 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2018-07-23 15:19:19,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:19,918 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-07-23 15:19:19,919 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 15:19:19,919 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-07-23 15:19:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-07-23 15:19:19,919 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:19,919 INFO L353 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1] [2018-07-23 15:19:19,920 INFO L414 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:19,920 INFO L82 PathProgramCache]: Analyzing trace with hash -527793333, now seen corresponding path program 43 times [2018-07-23 15:19:19,920 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 506 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:20,068 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:20,068 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-07-23 15:19:20,068 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 15:19:20,069 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 15:19:20,069 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:19:20,070 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 48 states. [2018-07-23 15:19:20,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:20,338 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-07-23 15:19:20,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 15:19:20,338 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 71 [2018-07-23 15:19:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:20,339 INFO L225 Difference]: With dead ends: 122 [2018-07-23 15:19:20,339 INFO L226 Difference]: Without dead ends: 73 [2018-07-23 15:19:20,341 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1197, Invalid=3773, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:19:20,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-07-23 15:19:20,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-07-23 15:19:20,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-07-23 15:19:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-07-23 15:19:20,351 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2018-07-23 15:19:20,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:20,351 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-07-23 15:19:20,351 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 15:19:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-07-23 15:19:20,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-07-23 15:19:20,352 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:20,352 INFO L353 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1] [2018-07-23 15:19:20,352 INFO L414 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:20,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1792657998, now seen corresponding path program 44 times [2018-07-23 15:19:20,353 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 276 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:20,449 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:20,449 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-07-23 15:19:20,450 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 15:19:20,450 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 15:19:20,451 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:19:20,451 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 27 states. [2018-07-23 15:19:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:20,560 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-07-23 15:19:20,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 15:19:20,560 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2018-07-23 15:19:20,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:20,561 INFO L225 Difference]: With dead ends: 81 [2018-07-23 15:19:20,561 INFO L226 Difference]: Without dead ends: 79 [2018-07-23 15:19:20,562 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:19:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-07-23 15:19:20,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-07-23 15:19:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-07-23 15:19:20,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-07-23 15:19:20,573 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-07-23 15:19:20,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:20,573 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-07-23 15:19:20,573 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 15:19:20,574 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-07-23 15:19:20,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 15:19:20,574 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:20,574 INFO L353 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1] [2018-07-23 15:19:20,575 INFO L414 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:20,575 INFO L82 PathProgramCache]: Analyzing trace with hash -462384358, now seen corresponding path program 45 times [2018-07-23 15:19:20,575 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 552 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:20,759 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:20,760 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-07-23 15:19:20,760 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 15:19:20,761 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 15:19:20,761 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:19:20,762 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 50 states. [2018-07-23 15:19:21,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:21,025 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2018-07-23 15:19:21,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 15:19:21,025 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 74 [2018-07-23 15:19:21,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:21,026 INFO L225 Difference]: With dead ends: 127 [2018-07-23 15:19:21,027 INFO L226 Difference]: Without dead ends: 76 [2018-07-23 15:19:21,029 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1297, Invalid=4105, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:19:21,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-07-23 15:19:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-07-23 15:19:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-07-23 15:19:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-07-23 15:19:21,042 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2018-07-23 15:19:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:21,042 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-07-23 15:19:21,043 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 15:19:21,043 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-07-23 15:19:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-07-23 15:19:21,043 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:21,044 INFO L353 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1] [2018-07-23 15:19:21,044 INFO L414 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:21,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1997435731, now seen corresponding path program 46 times [2018-07-23 15:19:21,044 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 300 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:21,182 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:21,182 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-07-23 15:19:21,182 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 15:19:21,182 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 15:19:21,183 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:19:21,183 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 28 states. [2018-07-23 15:19:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:21,294 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2018-07-23 15:19:21,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 15:19:21,294 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 75 [2018-07-23 15:19:21,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:21,295 INFO L225 Difference]: With dead ends: 84 [2018-07-23 15:19:21,295 INFO L226 Difference]: Without dead ends: 82 [2018-07-23 15:19:21,296 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:19:21,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-07-23 15:19:21,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2018-07-23 15:19:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-07-23 15:19:21,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-07-23 15:19:21,307 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2018-07-23 15:19:21,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:21,308 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-07-23 15:19:21,308 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 15:19:21,308 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-07-23 15:19:21,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-07-23 15:19:21,308 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:21,309 INFO L353 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1] [2018-07-23 15:19:21,309 INFO L414 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:21,309 INFO L82 PathProgramCache]: Analyzing trace with hash -314577797, now seen corresponding path program 47 times [2018-07-23 15:19:21,309 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 600 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:21,445 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:21,446 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-07-23 15:19:21,446 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 15:19:21,446 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 15:19:21,447 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:19:21,447 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 52 states. [2018-07-23 15:19:21,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:21,706 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-07-23 15:19:21,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 15:19:21,707 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 77 [2018-07-23 15:19:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:21,707 INFO L225 Difference]: With dead ends: 132 [2018-07-23 15:19:21,708 INFO L226 Difference]: Without dead ends: 79 [2018-07-23 15:19:21,709 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1401, Invalid=4451, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:19:21,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-07-23 15:19:21,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-07-23 15:19:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-07-23 15:19:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-07-23 15:19:21,721 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 77 [2018-07-23 15:19:21,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:21,721 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-07-23 15:19:21,721 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 15:19:21,721 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-07-23 15:19:21,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-07-23 15:19:21,722 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:21,722 INFO L353 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1] [2018-07-23 15:19:21,722 INFO L414 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:21,722 INFO L82 PathProgramCache]: Analyzing trace with hash -546310750, now seen corresponding path program 48 times [2018-07-23 15:19:21,722 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 325 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:21,804 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:21,805 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-07-23 15:19:21,805 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 15:19:21,805 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 15:19:21,805 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:19:21,806 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 29 states. [2018-07-23 15:19:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:21,902 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-07-23 15:19:21,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 15:19:21,902 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 78 [2018-07-23 15:19:21,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:21,903 INFO L225 Difference]: With dead ends: 87 [2018-07-23 15:19:21,903 INFO L226 Difference]: Without dead ends: 85 [2018-07-23 15:19:21,904 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:19:21,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-07-23 15:19:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2018-07-23 15:19:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-07-23 15:19:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-07-23 15:19:21,915 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-07-23 15:19:21,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:21,916 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-07-23 15:19:21,916 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 15:19:21,916 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-07-23 15:19:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 15:19:21,917 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:21,917 INFO L353 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1] [2018-07-23 15:19:21,917 INFO L414 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:21,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1018554614, now seen corresponding path program 49 times [2018-07-23 15:19:21,918 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 650 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:22,054 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:22,054 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-07-23 15:19:22,054 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 15:19:22,055 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 15:19:22,055 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:19:22,056 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 54 states. [2018-07-23 15:19:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:22,238 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-07-23 15:19:22,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 15:19:22,239 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 80 [2018-07-23 15:19:22,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:22,239 INFO L225 Difference]: With dead ends: 137 [2018-07-23 15:19:22,240 INFO L226 Difference]: Without dead ends: 82 [2018-07-23 15:19:22,241 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1509, Invalid=4811, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:19:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-07-23 15:19:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-07-23 15:19:22,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-07-23 15:19:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-07-23 15:19:22,252 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2018-07-23 15:19:22,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:22,252 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-07-23 15:19:22,252 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 15:19:22,253 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-07-23 15:19:22,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-07-23 15:19:22,253 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:22,253 INFO L353 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1] [2018-07-23 15:19:22,254 INFO L414 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:22,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1732454531, now seen corresponding path program 50 times [2018-07-23 15:19:22,254 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 351 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:22,344 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:22,344 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-07-23 15:19:22,344 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 15:19:22,344 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 15:19:22,345 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:19:22,345 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 30 states. [2018-07-23 15:19:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:22,442 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2018-07-23 15:19:22,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 15:19:22,443 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 81 [2018-07-23 15:19:22,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:22,444 INFO L225 Difference]: With dead ends: 90 [2018-07-23 15:19:22,444 INFO L226 Difference]: Without dead ends: 88 [2018-07-23 15:19:22,444 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:19:22,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-07-23 15:19:22,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-07-23 15:19:22,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-07-23 15:19:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-07-23 15:19:22,456 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2018-07-23 15:19:22,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:22,456 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-07-23 15:19:22,456 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 15:19:22,456 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-07-23 15:19:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-07-23 15:19:22,457 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:22,457 INFO L353 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1] [2018-07-23 15:19:22,457 INFO L414 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:22,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1558440533, now seen corresponding path program 51 times [2018-07-23 15:19:22,458 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 702 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:22,599 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:22,600 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-07-23 15:19:22,600 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 15:19:22,600 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 15:19:22,601 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:19:22,601 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 56 states. [2018-07-23 15:19:22,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:22,891 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2018-07-23 15:19:22,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 15:19:22,891 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 83 [2018-07-23 15:19:22,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:22,892 INFO L225 Difference]: With dead ends: 142 [2018-07-23 15:19:22,892 INFO L226 Difference]: Without dead ends: 85 [2018-07-23 15:19:22,893 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:19:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-07-23 15:19:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-07-23 15:19:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-07-23 15:19:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-07-23 15:19:22,905 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2018-07-23 15:19:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:22,905 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-07-23 15:19:22,905 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 15:19:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-07-23 15:19:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-07-23 15:19:22,906 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:22,906 INFO L353 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1] [2018-07-23 15:19:22,906 INFO L414 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:22,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1484023186, now seen corresponding path program 52 times [2018-07-23 15:19:22,907 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:23,003 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:23,003 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-07-23 15:19:23,003 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 15:19:23,004 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 15:19:23,004 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:19:23,004 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 31 states. [2018-07-23 15:19:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:23,109 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-07-23 15:19:23,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 15:19:23,109 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 84 [2018-07-23 15:19:23,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:23,110 INFO L225 Difference]: With dead ends: 93 [2018-07-23 15:19:23,110 INFO L226 Difference]: Without dead ends: 91 [2018-07-23 15:19:23,111 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:19:23,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-07-23 15:19:23,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-07-23 15:19:23,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-07-23 15:19:23,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-07-23 15:19:23,123 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-07-23 15:19:23,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:23,123 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-07-23 15:19:23,124 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 15:19:23,124 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-07-23 15:19:23,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-23 15:19:23,124 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:23,125 INFO L353 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1] [2018-07-23 15:19:23,125 INFO L414 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:23,125 INFO L82 PathProgramCache]: Analyzing trace with hash 217205498, now seen corresponding path program 53 times [2018-07-23 15:19:23,125 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 756 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:23,277 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:23,277 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-07-23 15:19:23,277 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 15:19:23,278 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 15:19:23,278 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:19:23,279 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 58 states. [2018-07-23 15:19:23,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:23,602 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-07-23 15:19:23,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 15:19:23,603 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 86 [2018-07-23 15:19:23,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:23,603 INFO L225 Difference]: With dead ends: 147 [2018-07-23 15:19:23,604 INFO L226 Difference]: Without dead ends: 88 [2018-07-23 15:19:23,605 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1737, Invalid=5573, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:19:23,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-07-23 15:19:23,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-07-23 15:19:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-07-23 15:19:23,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-07-23 15:19:23,620 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 86 [2018-07-23 15:19:23,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:23,620 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-07-23 15:19:23,620 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 15:19:23,621 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-07-23 15:19:23,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-07-23 15:19:23,621 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:23,622 INFO L353 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1] [2018-07-23 15:19:23,622 INFO L414 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:23,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1559010739, now seen corresponding path program 54 times [2018-07-23 15:19:23,622 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 406 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:23,764 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:23,764 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-07-23 15:19:23,765 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 15:19:23,765 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 15:19:23,766 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:19:23,766 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 32 states. [2018-07-23 15:19:23,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:23,903 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2018-07-23 15:19:23,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 15:19:23,904 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2018-07-23 15:19:23,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:23,905 INFO L225 Difference]: With dead ends: 96 [2018-07-23 15:19:23,905 INFO L226 Difference]: Without dead ends: 94 [2018-07-23 15:19:23,905 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:19:23,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-07-23 15:19:23,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2018-07-23 15:19:23,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-07-23 15:19:23,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-07-23 15:19:23,920 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 87 [2018-07-23 15:19:23,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:23,920 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-07-23 15:19:23,921 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 15:19:23,921 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-07-23 15:19:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-07-23 15:19:23,922 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:23,922 INFO L353 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1] [2018-07-23 15:19:23,922 INFO L414 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:23,922 INFO L82 PathProgramCache]: Analyzing trace with hash -734200101, now seen corresponding path program 55 times [2018-07-23 15:19:23,923 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 812 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:24,159 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:24,159 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-07-23 15:19:24,160 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-23 15:19:24,160 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-23 15:19:24,161 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:19:24,161 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 60 states. [2018-07-23 15:19:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:24,488 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-07-23 15:19:24,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 15:19:24,488 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 89 [2018-07-23 15:19:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:24,489 INFO L225 Difference]: With dead ends: 152 [2018-07-23 15:19:24,489 INFO L226 Difference]: Without dead ends: 91 [2018-07-23 15:19:24,490 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1857, Invalid=5975, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:19:24,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-07-23 15:19:24,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-07-23 15:19:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-07-23 15:19:24,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-07-23 15:19:24,504 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 89 [2018-07-23 15:19:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:24,504 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-07-23 15:19:24,504 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-23 15:19:24,504 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-07-23 15:19:24,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-07-23 15:19:24,505 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:24,505 INFO L353 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1] [2018-07-23 15:19:24,505 INFO L414 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:24,506 INFO L82 PathProgramCache]: Analyzing trace with hash -274889342, now seen corresponding path program 56 times [2018-07-23 15:19:24,506 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:24,604 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:24,604 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-07-23 15:19:24,604 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 15:19:24,604 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 15:19:24,605 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:19:24,605 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 33 states. [2018-07-23 15:19:24,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:24,707 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2018-07-23 15:19:24,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 15:19:24,708 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 90 [2018-07-23 15:19:24,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:24,709 INFO L225 Difference]: With dead ends: 99 [2018-07-23 15:19:24,709 INFO L226 Difference]: Without dead ends: 97 [2018-07-23 15:19:24,709 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:19:24,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-07-23 15:19:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2018-07-23 15:19:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-07-23 15:19:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-07-23 15:19:24,723 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-07-23 15:19:24,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:24,723 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-07-23 15:19:24,723 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 15:19:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-07-23 15:19:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-07-23 15:19:24,724 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:24,724 INFO L353 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1] [2018-07-23 15:19:24,725 INFO L414 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:24,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2119380714, now seen corresponding path program 57 times [2018-07-23 15:19:24,725 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 870 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:24,882 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:24,882 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-07-23 15:19:24,883 INFO L450 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-23 15:19:24,883 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-23 15:19:24,884 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:19:24,884 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 62 states. [2018-07-23 15:19:25,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:25,227 INFO L93 Difference]: Finished difference Result 157 states and 159 transitions. [2018-07-23 15:19:25,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 15:19:25,227 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 92 [2018-07-23 15:19:25,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:25,228 INFO L225 Difference]: With dead ends: 157 [2018-07-23 15:19:25,228 INFO L226 Difference]: Without dead ends: 94 [2018-07-23 15:19:25,230 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1981, Invalid=6391, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:19:25,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-07-23 15:19:25,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-07-23 15:19:25,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-07-23 15:19:25,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-07-23 15:19:25,242 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2018-07-23 15:19:25,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:25,243 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-07-23 15:19:25,243 INFO L472 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-23 15:19:25,243 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-07-23 15:19:25,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-07-23 15:19:25,244 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:25,244 INFO L353 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1] [2018-07-23 15:19:25,244 INFO L414 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:25,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1680397027, now seen corresponding path program 58 times [2018-07-23 15:19:25,245 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 465 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:25,356 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:25,356 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-07-23 15:19:25,357 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 15:19:25,357 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 15:19:25,357 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:19:25,357 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 34 states. [2018-07-23 15:19:25,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:25,469 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2018-07-23 15:19:25,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 15:19:25,469 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 93 [2018-07-23 15:19:25,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:25,470 INFO L225 Difference]: With dead ends: 102 [2018-07-23 15:19:25,470 INFO L226 Difference]: Without dead ends: 100 [2018-07-23 15:19:25,471 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:19:25,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-07-23 15:19:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2018-07-23 15:19:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-07-23 15:19:25,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-07-23 15:19:25,484 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2018-07-23 15:19:25,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:25,485 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-07-23 15:19:25,485 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 15:19:25,485 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-07-23 15:19:25,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-07-23 15:19:25,486 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:25,486 INFO L353 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1] [2018-07-23 15:19:25,486 INFO L414 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:25,486 INFO L82 PathProgramCache]: Analyzing trace with hash -46094325, now seen corresponding path program 59 times [2018-07-23 15:19:25,486 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 930 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:25,655 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:25,655 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-07-23 15:19:25,655 INFO L450 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-23 15:19:25,656 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-23 15:19:25,656 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:19:25,657 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 64 states. [2018-07-23 15:19:26,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:26,031 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2018-07-23 15:19:26,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 15:19:26,031 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 95 [2018-07-23 15:19:26,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:26,032 INFO L225 Difference]: With dead ends: 162 [2018-07-23 15:19:26,032 INFO L226 Difference]: Without dead ends: 97 [2018-07-23 15:19:26,034 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2109, Invalid=6821, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:19:26,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-07-23 15:19:26,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-07-23 15:19:26,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-07-23 15:19:26,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-07-23 15:19:26,047 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 95 [2018-07-23 15:19:26,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:26,048 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-07-23 15:19:26,048 INFO L472 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-23 15:19:26,048 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-07-23 15:19:26,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-07-23 15:19:26,049 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:26,049 INFO L353 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1, 1] [2018-07-23 15:19:26,049 INFO L414 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:26,049 INFO L82 PathProgramCache]: Analyzing trace with hash 366302578, now seen corresponding path program 60 times [2018-07-23 15:19:26,049 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 496 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:26,159 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:26,159 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-07-23 15:19:26,160 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 15:19:26,160 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 15:19:26,160 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:19:26,161 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 35 states. [2018-07-23 15:19:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:26,286 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-07-23 15:19:26,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 15:19:26,286 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 96 [2018-07-23 15:19:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:26,287 INFO L225 Difference]: With dead ends: 105 [2018-07-23 15:19:26,287 INFO L226 Difference]: Without dead ends: 103 [2018-07-23 15:19:26,288 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:19:26,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-07-23 15:19:26,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-07-23 15:19:26,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-07-23 15:19:26,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-07-23 15:19:26,301 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-07-23 15:19:26,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:26,301 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-07-23 15:19:26,301 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 15:19:26,301 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-07-23 15:19:26,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-07-23 15:19:26,302 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:26,302 INFO L353 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1] [2018-07-23 15:19:26,303 INFO L414 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:26,303 INFO L82 PathProgramCache]: Analyzing trace with hash -170474790, now seen corresponding path program 61 times [2018-07-23 15:19:26,303 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 992 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:26,483 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:26,484 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-07-23 15:19:26,484 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-23 15:19:26,485 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-23 15:19:26,486 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:19:26,486 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 66 states. [2018-07-23 15:19:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:26,903 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2018-07-23 15:19:26,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 15:19:26,904 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 98 [2018-07-23 15:19:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:26,905 INFO L225 Difference]: With dead ends: 167 [2018-07-23 15:19:26,905 INFO L226 Difference]: Without dead ends: 100 [2018-07-23 15:19:26,906 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2241, Invalid=7265, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:19:26,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-07-23 15:19:26,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-07-23 15:19:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-07-23 15:19:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-07-23 15:19:26,918 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 98 [2018-07-23 15:19:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:26,918 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-07-23 15:19:26,918 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-23 15:19:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-07-23 15:19:26,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-07-23 15:19:26,919 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:26,919 INFO L353 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1] [2018-07-23 15:19:26,920 INFO L414 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:26,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1939195923, now seen corresponding path program 62 times [2018-07-23 15:19:26,920 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 528 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:27,033 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:27,033 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-07-23 15:19:27,034 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 15:19:27,034 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 15:19:27,034 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:19:27,035 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 36 states. [2018-07-23 15:19:27,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:27,161 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2018-07-23 15:19:27,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 15:19:27,162 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 99 [2018-07-23 15:19:27,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:27,163 INFO L225 Difference]: With dead ends: 108 [2018-07-23 15:19:27,163 INFO L226 Difference]: Without dead ends: 106 [2018-07-23 15:19:27,164 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:19:27,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-07-23 15:19:27,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2018-07-23 15:19:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-07-23 15:19:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-07-23 15:19:27,178 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2018-07-23 15:19:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:27,179 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-07-23 15:19:27,179 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 15:19:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-07-23 15:19:27,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-07-23 15:19:27,182 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:27,182 INFO L353 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1, 1, 1] [2018-07-23 15:19:27,182 INFO L414 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:27,183 INFO L82 PathProgramCache]: Analyzing trace with hash -448458437, now seen corresponding path program 63 times [2018-07-23 15:19:27,183 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 1056 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:27,352 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:27,352 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-07-23 15:19:27,352 INFO L450 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-23 15:19:27,353 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-23 15:19:27,353 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:19:27,354 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 68 states. [2018-07-23 15:19:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:27,733 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2018-07-23 15:19:27,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 15:19:27,733 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 101 [2018-07-23 15:19:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:27,734 INFO L225 Difference]: With dead ends: 172 [2018-07-23 15:19:27,734 INFO L226 Difference]: Without dead ends: 103 [2018-07-23 15:19:27,736 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2377, Invalid=7723, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:19:27,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-07-23 15:19:27,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-07-23 15:19:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-07-23 15:19:27,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-07-23 15:19:27,748 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 101 [2018-07-23 15:19:27,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:27,748 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-07-23 15:19:27,748 INFO L472 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-23 15:19:27,748 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-07-23 15:19:27,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-07-23 15:19:27,749 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:27,749 INFO L353 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1, 1] [2018-07-23 15:19:27,749 INFO L414 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:27,750 INFO L82 PathProgramCache]: Analyzing trace with hash 495310178, now seen corresponding path program 64 times [2018-07-23 15:19:27,750 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:27,863 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:27,863 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-07-23 15:19:27,863 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 15:19:27,864 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 15:19:27,864 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:19:27,864 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 37 states. [2018-07-23 15:19:27,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:27,983 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2018-07-23 15:19:27,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 15:19:27,983 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 102 [2018-07-23 15:19:27,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:27,984 INFO L225 Difference]: With dead ends: 111 [2018-07-23 15:19:27,984 INFO L226 Difference]: Without dead ends: 109 [2018-07-23 15:19:27,985 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:19:27,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-07-23 15:19:27,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2018-07-23 15:19:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-07-23 15:19:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-07-23 15:19:27,997 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-07-23 15:19:27,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:27,997 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-07-23 15:19:27,998 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 15:19:27,998 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-07-23 15:19:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-07-23 15:19:27,999 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:27,999 INFO L353 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1, 1, 1] [2018-07-23 15:19:27,999 INFO L414 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:27,999 INFO L82 PathProgramCache]: Analyzing trace with hash -748222774, now seen corresponding path program 65 times [2018-07-23 15:19:27,999 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 1122 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:28,183 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:28,183 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-07-23 15:19:28,183 INFO L450 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-23 15:19:28,184 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-23 15:19:28,185 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:19:28,185 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 70 states. [2018-07-23 15:19:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:28,610 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2018-07-23 15:19:28,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 15:19:28,610 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 104 [2018-07-23 15:19:28,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:28,611 INFO L225 Difference]: With dead ends: 177 [2018-07-23 15:19:28,611 INFO L226 Difference]: Without dead ends: 106 [2018-07-23 15:19:28,613 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2517, Invalid=8195, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:19:28,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-07-23 15:19:28,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-07-23 15:19:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-07-23 15:19:28,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-07-23 15:19:28,627 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2018-07-23 15:19:28,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:28,627 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-07-23 15:19:28,627 INFO L472 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-23 15:19:28,627 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-07-23 15:19:28,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-07-23 15:19:28,628 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:28,628 INFO L353 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1, 1] [2018-07-23 15:19:28,629 INFO L414 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:28,629 INFO L82 PathProgramCache]: Analyzing trace with hash 206667075, now seen corresponding path program 66 times [2018-07-23 15:19:28,629 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 595 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:28,759 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:28,760 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-07-23 15:19:28,760 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 15:19:28,760 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 15:19:28,761 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:19:28,761 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 38 states. [2018-07-23 15:19:28,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:28,894 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2018-07-23 15:19:28,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 15:19:28,895 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 105 [2018-07-23 15:19:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:28,896 INFO L225 Difference]: With dead ends: 114 [2018-07-23 15:19:28,896 INFO L226 Difference]: Without dead ends: 112 [2018-07-23 15:19:28,897 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:19:28,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-07-23 15:19:28,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2018-07-23 15:19:28,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-07-23 15:19:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-07-23 15:19:28,912 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2018-07-23 15:19:28,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:28,913 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-07-23 15:19:28,913 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 15:19:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-07-23 15:19:28,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-07-23 15:19:28,914 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:28,914 INFO L353 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1] [2018-07-23 15:19:28,914 INFO L414 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:28,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1038629483, now seen corresponding path program 67 times [2018-07-23 15:19:28,914 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 1190 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:29,117 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:29,117 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-07-23 15:19:29,118 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 15:19:29,118 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 15:19:29,119 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:19:29,119 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 72 states. [2018-07-23 15:19:29,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:29,607 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-07-23 15:19:29,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 15:19:29,608 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 107 [2018-07-23 15:19:29,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:29,609 INFO L225 Difference]: With dead ends: 182 [2018-07-23 15:19:29,609 INFO L226 Difference]: Without dead ends: 109 [2018-07-23 15:19:29,611 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2661, Invalid=8681, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:19:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-07-23 15:19:29,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-07-23 15:19:29,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-07-23 15:19:29,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-07-23 15:19:29,629 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 107 [2018-07-23 15:19:29,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:29,630 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-07-23 15:19:29,630 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 15:19:29,630 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-07-23 15:19:29,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-07-23 15:19:29,631 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:29,631 INFO L353 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1, 1] [2018-07-23 15:19:29,631 INFO L414 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:29,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1701247662, now seen corresponding path program 68 times [2018-07-23 15:19:29,632 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 630 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:29,814 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:29,814 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-07-23 15:19:29,814 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 15:19:29,815 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 15:19:29,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:19:29,816 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 39 states. [2018-07-23 15:19:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:29,989 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-07-23 15:19:29,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 15:19:29,989 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 108 [2018-07-23 15:19:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:29,990 INFO L225 Difference]: With dead ends: 117 [2018-07-23 15:19:29,990 INFO L226 Difference]: Without dead ends: 115 [2018-07-23 15:19:29,992 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:19:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-07-23 15:19:30,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-07-23 15:19:30,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-07-23 15:19:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-07-23 15:19:30,040 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-07-23 15:19:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:30,040 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-07-23 15:19:30,040 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 15:19:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-07-23 15:19:30,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-07-23 15:19:30,041 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:30,041 INFO L353 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1] [2018-07-23 15:19:30,041 INFO L414 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:30,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1483602618, now seen corresponding path program 69 times [2018-07-23 15:19:30,042 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1260 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:30,256 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:30,256 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-07-23 15:19:30,256 INFO L450 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-23 15:19:30,257 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-23 15:19:30,258 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:19:30,258 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 74 states. [2018-07-23 15:19:30,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:30,730 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2018-07-23 15:19:30,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 15:19:30,731 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 110 [2018-07-23 15:19:30,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:30,732 INFO L225 Difference]: With dead ends: 187 [2018-07-23 15:19:30,732 INFO L226 Difference]: Without dead ends: 112 [2018-07-23 15:19:30,733 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2809, Invalid=9181, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:19:30,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-07-23 15:19:30,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-07-23 15:19:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-07-23 15:19:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-07-23 15:19:30,750 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 110 [2018-07-23 15:19:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:30,750 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-07-23 15:19:30,750 INFO L472 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-23 15:19:30,750 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-07-23 15:19:30,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-07-23 15:19:30,751 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:30,751 INFO L353 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1, 1] [2018-07-23 15:19:30,751 INFO L414 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:30,752 INFO L82 PathProgramCache]: Analyzing trace with hash -637930893, now seen corresponding path program 70 times [2018-07-23 15:19:30,752 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 666 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:30,895 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:30,895 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-07-23 15:19:30,896 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 15:19:30,896 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 15:19:30,896 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:19:30,897 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 40 states. [2018-07-23 15:19:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:31,038 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2018-07-23 15:19:31,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 15:19:31,038 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 111 [2018-07-23 15:19:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:31,039 INFO L225 Difference]: With dead ends: 120 [2018-07-23 15:19:31,039 INFO L226 Difference]: Without dead ends: 118 [2018-07-23 15:19:31,040 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:19:31,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-07-23 15:19:31,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-07-23 15:19:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-07-23 15:19:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-07-23 15:19:31,058 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2018-07-23 15:19:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:31,058 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-07-23 15:19:31,059 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 15:19:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-07-23 15:19:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-07-23 15:19:31,060 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:31,060 INFO L353 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1, 1, 1] [2018-07-23 15:19:31,060 INFO L414 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:31,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1128801179, now seen corresponding path program 71 times [2018-07-23 15:19:31,061 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 1332 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:31,288 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:31,288 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-07-23 15:19:31,289 INFO L450 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-23 15:19:31,289 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-23 15:19:31,290 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:19:31,290 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 76 states. [2018-07-23 15:19:31,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:31,586 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2018-07-23 15:19:31,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 15:19:31,586 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 113 [2018-07-23 15:19:31,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:31,587 INFO L225 Difference]: With dead ends: 192 [2018-07-23 15:19:31,587 INFO L226 Difference]: Without dead ends: 115 [2018-07-23 15:19:31,589 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2961, Invalid=9695, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:19:31,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-07-23 15:19:31,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-07-23 15:19:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-07-23 15:19:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-07-23 15:19:31,604 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 113 [2018-07-23 15:19:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:31,604 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-07-23 15:19:31,604 INFO L472 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-23 15:19:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-07-23 15:19:31,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-07-23 15:19:31,606 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:31,606 INFO L353 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1, 1] [2018-07-23 15:19:31,606 INFO L414 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:31,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1032264382, now seen corresponding path program 72 times [2018-07-23 15:19:31,606 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 703 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:31,740 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:31,741 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-07-23 15:19:31,741 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 15:19:31,741 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 15:19:31,742 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:19:31,742 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 41 states. [2018-07-23 15:19:31,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:31,877 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2018-07-23 15:19:31,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 15:19:31,877 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 114 [2018-07-23 15:19:31,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:31,878 INFO L225 Difference]: With dead ends: 123 [2018-07-23 15:19:31,878 INFO L226 Difference]: Without dead ends: 121 [2018-07-23 15:19:31,879 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:19:31,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-07-23 15:19:31,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2018-07-23 15:19:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-07-23 15:19:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-07-23 15:19:31,893 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-07-23 15:19:31,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:31,893 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-07-23 15:19:31,894 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 15:19:31,894 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-07-23 15:19:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-07-23 15:19:31,895 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:31,895 INFO L353 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1] [2018-07-23 15:19:31,895 INFO L414 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:31,895 INFO L82 PathProgramCache]: Analyzing trace with hash 131440298, now seen corresponding path program 73 times [2018-07-23 15:19:31,895 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 1406 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:32,113 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:32,113 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-07-23 15:19:32,114 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-23 15:19:32,114 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-23 15:19:32,115 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:19:32,116 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 78 states. [2018-07-23 15:19:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:32,632 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2018-07-23 15:19:32,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 15:19:32,632 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 116 [2018-07-23 15:19:32,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:32,633 INFO L225 Difference]: With dead ends: 197 [2018-07-23 15:19:32,633 INFO L226 Difference]: Without dead ends: 118 [2018-07-23 15:19:32,635 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3117, Invalid=10223, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:19:32,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-07-23 15:19:32,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-07-23 15:19:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-07-23 15:19:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-07-23 15:19:32,648 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2018-07-23 15:19:32,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:32,648 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-07-23 15:19:32,648 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-23 15:19:32,649 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-07-23 15:19:32,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-07-23 15:19:32,650 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:32,650 INFO L353 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1, 1] [2018-07-23 15:19:32,650 INFO L414 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:32,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1387079587, now seen corresponding path program 74 times [2018-07-23 15:19:32,650 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 741 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:32,798 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:32,799 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-07-23 15:19:32,799 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 15:19:32,799 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 15:19:32,800 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:19:32,800 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 42 states. [2018-07-23 15:19:32,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:32,949 INFO L93 Difference]: Finished difference Result 126 states and 127 transitions. [2018-07-23 15:19:32,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 15:19:32,950 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 117 [2018-07-23 15:19:32,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:32,951 INFO L225 Difference]: With dead ends: 126 [2018-07-23 15:19:32,951 INFO L226 Difference]: Without dead ends: 124 [2018-07-23 15:19:32,952 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:19:32,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-07-23 15:19:32,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2018-07-23 15:19:32,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-07-23 15:19:32,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-07-23 15:19:32,969 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2018-07-23 15:19:32,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:32,970 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-07-23 15:19:32,970 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 15:19:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-07-23 15:19:32,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-07-23 15:19:32,971 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:32,971 INFO L353 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1, 1, 1] [2018-07-23 15:19:32,971 INFO L414 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:32,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1543687371, now seen corresponding path program 75 times [2018-07-23 15:19:32,972 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 1482 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:33,271 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:33,271 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-07-23 15:19:33,275 INFO L450 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-23 15:19:33,275 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-23 15:19:33,276 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4681, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:19:33,276 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 80 states. [2018-07-23 15:19:33,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:33,825 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2018-07-23 15:19:33,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 15:19:33,826 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 119 [2018-07-23 15:19:33,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:33,826 INFO L225 Difference]: With dead ends: 202 [2018-07-23 15:19:33,827 INFO L226 Difference]: Without dead ends: 121 [2018-07-23 15:19:33,828 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3277, Invalid=10765, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:19:33,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-07-23 15:19:33,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-07-23 15:19:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-07-23 15:19:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-07-23 15:19:33,841 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2018-07-23 15:19:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:33,841 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-07-23 15:19:33,841 INFO L472 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-23 15:19:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-07-23 15:19:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-07-23 15:19:33,843 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:33,843 INFO L353 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1, 1] [2018-07-23 15:19:33,843 INFO L414 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:33,843 INFO L82 PathProgramCache]: Analyzing trace with hash -871402190, now seen corresponding path program 76 times [2018-07-23 15:19:33,843 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 780 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:33,996 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:33,996 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-07-23 15:19:34,000 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 15:19:34,000 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 15:19:34,001 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:19:34,001 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 43 states. [2018-07-23 15:19:34,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:34,150 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-07-23 15:19:34,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 15:19:34,151 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 120 [2018-07-23 15:19:34,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:34,152 INFO L225 Difference]: With dead ends: 129 [2018-07-23 15:19:34,152 INFO L226 Difference]: Without dead ends: 127 [2018-07-23 15:19:34,153 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:19:34,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-07-23 15:19:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-07-23 15:19:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-07-23 15:19:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-07-23 15:19:34,169 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-07-23 15:19:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:34,170 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-07-23 15:19:34,170 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 15:19:34,170 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-07-23 15:19:34,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-07-23 15:19:34,171 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:34,171 INFO L353 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1, 1, 1] [2018-07-23 15:19:34,171 INFO L414 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:34,172 INFO L82 PathProgramCache]: Analyzing trace with hash 101184154, now seen corresponding path program 77 times [2018-07-23 15:19:34,172 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 1560 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:34,414 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:34,414 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-07-23 15:19:34,415 INFO L450 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-23 15:19:34,415 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-23 15:19:34,416 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:19:34,416 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 82 states. [2018-07-23 15:19:35,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:35,016 INFO L93 Difference]: Finished difference Result 207 states and 209 transitions. [2018-07-23 15:19:35,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 15:19:35,016 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 122 [2018-07-23 15:19:35,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:35,017 INFO L225 Difference]: With dead ends: 207 [2018-07-23 15:19:35,017 INFO L226 Difference]: Without dead ends: 124 [2018-07-23 15:19:35,019 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3441, Invalid=11321, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:19:35,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-07-23 15:19:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-07-23 15:19:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-07-23 15:19:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2018-07-23 15:19:35,034 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 122 [2018-07-23 15:19:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:35,035 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2018-07-23 15:19:35,035 INFO L472 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-23 15:19:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2018-07-23 15:19:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-07-23 15:19:35,036 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:35,036 INFO L353 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1, 1] [2018-07-23 15:19:35,036 INFO L414 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:35,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1460214995, now seen corresponding path program 78 times [2018-07-23 15:19:35,037 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 820 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:35,191 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:35,191 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-07-23 15:19:35,191 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 15:19:35,191 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 15:19:35,192 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:19:35,192 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 44 states. [2018-07-23 15:19:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:35,343 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2018-07-23 15:19:35,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 15:19:35,343 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 123 [2018-07-23 15:19:35,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:35,344 INFO L225 Difference]: With dead ends: 132 [2018-07-23 15:19:35,345 INFO L226 Difference]: Without dead ends: 130 [2018-07-23 15:19:35,345 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:19:35,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-07-23 15:19:35,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2018-07-23 15:19:35,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-07-23 15:19:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-07-23 15:19:35,359 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2018-07-23 15:19:35,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:35,360 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-07-23 15:19:35,360 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 15:19:35,360 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-07-23 15:19:35,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-07-23 15:19:35,361 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:35,361 INFO L353 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1] [2018-07-23 15:19:35,361 INFO L414 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:35,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1187629573, now seen corresponding path program 79 times [2018-07-23 15:19:35,362 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 1640 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:35,634 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:35,635 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-07-23 15:19:35,635 INFO L450 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-23 15:19:35,635 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-23 15:19:35,636 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=5167, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:19:35,636 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 84 states. [2018-07-23 15:19:36,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:36,145 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-07-23 15:19:36,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 15:19:36,145 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 125 [2018-07-23 15:19:36,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:36,146 INFO L225 Difference]: With dead ends: 212 [2018-07-23 15:19:36,146 INFO L226 Difference]: Without dead ends: 127 [2018-07-23 15:19:36,148 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3609, Invalid=11891, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:19:36,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-07-23 15:19:36,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-07-23 15:19:36,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-07-23 15:19:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-07-23 15:19:36,165 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 125 [2018-07-23 15:19:36,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:36,166 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-07-23 15:19:36,166 INFO L472 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-23 15:19:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-07-23 15:19:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-07-23 15:19:36,167 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:36,167 INFO L353 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1, 1] [2018-07-23 15:19:36,168 INFO L414 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:36,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1338422562, now seen corresponding path program 80 times [2018-07-23 15:19:36,168 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 861 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:36,382 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:36,382 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-07-23 15:19:36,382 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 15:19:36,383 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 15:19:36,383 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:19:36,383 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 45 states. [2018-07-23 15:19:36,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:36,592 INFO L93 Difference]: Finished difference Result 135 states and 136 transitions. [2018-07-23 15:19:36,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 15:19:36,593 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 126 [2018-07-23 15:19:36,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:36,594 INFO L225 Difference]: With dead ends: 135 [2018-07-23 15:19:36,594 INFO L226 Difference]: Without dead ends: 133 [2018-07-23 15:19:36,595 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:19:36,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-07-23 15:19:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2018-07-23 15:19:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-07-23 15:19:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-07-23 15:19:36,618 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-07-23 15:19:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:36,619 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-07-23 15:19:36,619 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 15:19:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-07-23 15:19:36,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-07-23 15:19:36,620 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:36,620 INFO L353 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1, 1, 1] [2018-07-23 15:19:36,620 INFO L414 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:36,620 INFO L82 PathProgramCache]: Analyzing trace with hash 2028926602, now seen corresponding path program 81 times [2018-07-23 15:19:36,621 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 1722 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:36,993 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:36,993 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-07-23 15:19:36,993 INFO L450 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-23 15:19:36,994 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-23 15:19:36,994 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:19:36,994 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 86 states. [2018-07-23 15:19:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:37,592 INFO L93 Difference]: Finished difference Result 217 states and 219 transitions. [2018-07-23 15:19:37,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 15:19:37,592 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 128 [2018-07-23 15:19:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:37,593 INFO L225 Difference]: With dead ends: 217 [2018-07-23 15:19:37,593 INFO L226 Difference]: Without dead ends: 130 [2018-07-23 15:19:37,595 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3781, Invalid=12475, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:19:37,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-07-23 15:19:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-07-23 15:19:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-07-23 15:19:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2018-07-23 15:19:37,610 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 128 [2018-07-23 15:19:37,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:37,610 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2018-07-23 15:19:37,610 INFO L472 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-23 15:19:37,610 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2018-07-23 15:19:37,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-07-23 15:19:37,611 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:37,611 INFO L353 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1, 1] [2018-07-23 15:19:37,612 INFO L414 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:37,612 INFO L82 PathProgramCache]: Analyzing trace with hash -768880125, now seen corresponding path program 82 times [2018-07-23 15:19:37,612 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 903 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:37,775 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:37,775 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-07-23 15:19:37,775 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 15:19:37,776 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 15:19:37,776 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:19:37,776 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 46 states. [2018-07-23 15:19:37,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:37,932 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2018-07-23 15:19:37,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 15:19:37,933 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 129 [2018-07-23 15:19:37,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:37,934 INFO L225 Difference]: With dead ends: 138 [2018-07-23 15:19:37,934 INFO L226 Difference]: Without dead ends: 136 [2018-07-23 15:19:37,934 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:19:37,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-07-23 15:19:37,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2018-07-23 15:19:37,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-07-23 15:19:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2018-07-23 15:19:37,949 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2018-07-23 15:19:37,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:37,950 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2018-07-23 15:19:37,950 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 15:19:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2018-07-23 15:19:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-07-23 15:19:37,950 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:37,951 INFO L353 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1, 1, 1] [2018-07-23 15:19:37,951 INFO L414 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:37,951 INFO L82 PathProgramCache]: Analyzing trace with hash -159359189, now seen corresponding path program 83 times [2018-07-23 15:19:37,951 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 1806 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:38,152 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:38,152 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-07-23 15:19:38,153 INFO L450 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-23 15:19:38,153 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-23 15:19:38,153 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=5677, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:19:38,154 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 88 states. [2018-07-23 15:19:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:38,388 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2018-07-23 15:19:38,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 15:19:38,388 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 131 [2018-07-23 15:19:38,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:38,389 INFO L225 Difference]: With dead ends: 222 [2018-07-23 15:19:38,389 INFO L226 Difference]: Without dead ends: 133 [2018-07-23 15:19:38,391 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3957, Invalid=13073, Unknown=0, NotChecked=0, Total=17030 [2018-07-23 15:19:38,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-07-23 15:19:38,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-07-23 15:19:38,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-07-23 15:19:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-07-23 15:19:38,406 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 131 [2018-07-23 15:19:38,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:38,407 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-07-23 15:19:38,407 INFO L472 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-23 15:19:38,407 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-07-23 15:19:38,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-07-23 15:19:38,408 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:38,408 INFO L353 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1, 1] [2018-07-23 15:19:38,408 INFO L414 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:38,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1484217070, now seen corresponding path program 84 times [2018-07-23 15:19:38,408 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 946 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:38,592 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:38,592 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-07-23 15:19:38,593 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 15:19:38,593 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 15:19:38,593 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:19:38,593 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 47 states. [2018-07-23 15:19:38,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:38,760 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-07-23 15:19:38,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 15:19:38,761 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 132 [2018-07-23 15:19:38,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:38,762 INFO L225 Difference]: With dead ends: 141 [2018-07-23 15:19:38,762 INFO L226 Difference]: Without dead ends: 139 [2018-07-23 15:19:38,763 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:19:38,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-07-23 15:19:38,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-07-23 15:19:38,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-07-23 15:19:38,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-07-23 15:19:38,780 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-07-23 15:19:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:38,780 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-07-23 15:19:38,780 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 15:19:38,780 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-07-23 15:19:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-07-23 15:19:38,781 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:38,781 INFO L353 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1] [2018-07-23 15:19:38,781 INFO L414 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:38,781 INFO L82 PathProgramCache]: Analyzing trace with hash -403395974, now seen corresponding path program 85 times [2018-07-23 15:19:38,782 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1892 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:39,068 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:39,068 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-07-23 15:19:39,069 INFO L450 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-23 15:19:39,070 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-23 15:19:39,070 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:19:39,070 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 90 states. [2018-07-23 15:19:39,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:39,532 INFO L93 Difference]: Finished difference Result 227 states and 229 transitions. [2018-07-23 15:19:39,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 15:19:39,532 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 134 [2018-07-23 15:19:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:39,533 INFO L225 Difference]: With dead ends: 227 [2018-07-23 15:19:39,533 INFO L226 Difference]: Without dead ends: 136 [2018-07-23 15:19:39,534 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=4137, Invalid=13685, Unknown=0, NotChecked=0, Total=17822 [2018-07-23 15:19:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-07-23 15:19:39,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-07-23 15:19:39,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-07-23 15:19:39,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2018-07-23 15:19:39,551 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 134 [2018-07-23 15:19:39,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:39,551 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2018-07-23 15:19:39,552 INFO L472 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-23 15:19:39,552 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2018-07-23 15:19:39,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-07-23 15:19:39,552 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:39,553 INFO L353 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1, 1] [2018-07-23 15:19:39,553 INFO L414 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:39,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1504921395, now seen corresponding path program 86 times [2018-07-23 15:19:39,553 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 990 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:39,691 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:39,692 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-07-23 15:19:39,692 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 15:19:39,692 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 15:19:39,693 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:19:39,693 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 48 states. [2018-07-23 15:19:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:39,810 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2018-07-23 15:19:39,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 15:19:39,810 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 135 [2018-07-23 15:19:39,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:39,811 INFO L225 Difference]: With dead ends: 144 [2018-07-23 15:19:39,811 INFO L226 Difference]: Without dead ends: 142 [2018-07-23 15:19:39,812 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:19:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-07-23 15:19:39,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2018-07-23 15:19:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-07-23 15:19:39,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2018-07-23 15:19:39,880 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 135 [2018-07-23 15:19:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:39,880 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2018-07-23 15:19:39,880 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 15:19:39,881 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2018-07-23 15:19:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-07-23 15:19:39,881 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:39,882 INFO L353 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1, 1, 1] [2018-07-23 15:19:39,882 INFO L414 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:39,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1174452133, now seen corresponding path program 87 times [2018-07-23 15:19:39,882 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 1980 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:40,098 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:40,098 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-07-23 15:19:40,098 INFO L450 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-23 15:19:40,099 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-23 15:19:40,099 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:19:40,099 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 92 states. [2018-07-23 15:19:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:40,553 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2018-07-23 15:19:40,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 15:19:40,554 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 137 [2018-07-23 15:19:40,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:40,555 INFO L225 Difference]: With dead ends: 232 [2018-07-23 15:19:40,555 INFO L226 Difference]: Without dead ends: 139 [2018-07-23 15:19:40,557 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4321, Invalid=14311, Unknown=0, NotChecked=0, Total=18632 [2018-07-23 15:19:40,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-07-23 15:19:40,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-07-23 15:19:40,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-07-23 15:19:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-07-23 15:19:40,575 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 137 [2018-07-23 15:19:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:40,575 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-07-23 15:19:40,575 INFO L472 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-23 15:19:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-07-23 15:19:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-07-23 15:19:40,576 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:40,576 INFO L353 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1, 1] [2018-07-23 15:19:40,577 INFO L414 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:40,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1321157890, now seen corresponding path program 88 times [2018-07-23 15:19:40,577 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 1035 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:40,738 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:40,739 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-07-23 15:19:40,739 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 15:19:40,739 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 15:19:40,739 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:19:40,739 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 49 states. [2018-07-23 15:19:40,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:40,888 INFO L93 Difference]: Finished difference Result 147 states and 148 transitions. [2018-07-23 15:19:40,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 15:19:40,889 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 138 [2018-07-23 15:19:40,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:40,890 INFO L225 Difference]: With dead ends: 147 [2018-07-23 15:19:40,890 INFO L226 Difference]: Without dead ends: 145 [2018-07-23 15:19:40,891 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:19:40,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-07-23 15:19:40,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 141. [2018-07-23 15:19:40,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-07-23 15:19:40,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-07-23 15:19:40,910 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-07-23 15:19:40,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:40,910 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-07-23 15:19:40,910 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 15:19:40,910 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-07-23 15:19:40,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-07-23 15:19:40,911 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:40,911 INFO L353 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1, 1, 1] [2018-07-23 15:19:40,912 INFO L414 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:40,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1677521302, now seen corresponding path program 89 times [2018-07-23 15:19:40,912 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 2070 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:41,156 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:41,156 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-07-23 15:19:41,156 INFO L450 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-23 15:19:41,157 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-23 15:19:41,157 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:19:41,157 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 94 states. [2018-07-23 15:19:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:41,779 INFO L93 Difference]: Finished difference Result 237 states and 239 transitions. [2018-07-23 15:19:41,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 15:19:41,779 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 140 [2018-07-23 15:19:41,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:41,780 INFO L225 Difference]: With dead ends: 237 [2018-07-23 15:19:41,781 INFO L226 Difference]: Without dead ends: 142 [2018-07-23 15:19:41,782 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=4509, Invalid=14951, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:19:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-07-23 15:19:41,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-07-23 15:19:41,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-07-23 15:19:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2018-07-23 15:19:41,801 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 140 [2018-07-23 15:19:41,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:41,801 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2018-07-23 15:19:41,801 INFO L472 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-23 15:19:41,801 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2018-07-23 15:19:41,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-07-23 15:19:41,802 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:41,802 INFO L353 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1, 1] [2018-07-23 15:19:41,802 INFO L414 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:41,803 INFO L82 PathProgramCache]: Analyzing trace with hash -843219869, now seen corresponding path program 90 times [2018-07-23 15:19:41,803 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 1081 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:41,927 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:41,927 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-07-23 15:19:41,927 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 15:19:41,928 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 15:19:41,928 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:19:41,928 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 50 states. [2018-07-23 15:19:42,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:42,131 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2018-07-23 15:19:42,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-23 15:19:42,131 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 141 [2018-07-23 15:19:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:42,132 INFO L225 Difference]: With dead ends: 150 [2018-07-23 15:19:42,132 INFO L226 Difference]: Without dead ends: 148 [2018-07-23 15:19:42,133 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:19:42,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-07-23 15:19:42,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-07-23 15:19:42,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-07-23 15:19:42,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2018-07-23 15:19:42,150 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2018-07-23 15:19:42,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:42,150 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2018-07-23 15:19:42,150 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 15:19:42,150 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2018-07-23 15:19:42,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-07-23 15:19:42,151 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:42,151 INFO L353 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1] [2018-07-23 15:19:42,151 INFO L414 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:42,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1414590859, now seen corresponding path program 91 times [2018-07-23 15:19:42,152 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 2162 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:42,365 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:42,365 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-07-23 15:19:42,365 INFO L450 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-23 15:19:42,366 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-23 15:19:42,366 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:19:42,367 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 96 states. [2018-07-23 15:19:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:42,956 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-07-23 15:19:42,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-23 15:19:42,957 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 143 [2018-07-23 15:19:42,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:42,958 INFO L225 Difference]: With dead ends: 242 [2018-07-23 15:19:42,958 INFO L226 Difference]: Without dead ends: 145 [2018-07-23 15:19:42,959 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4701, Invalid=15605, Unknown=0, NotChecked=0, Total=20306 [2018-07-23 15:19:42,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-07-23 15:19:42,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-07-23 15:19:42,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-07-23 15:19:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-07-23 15:19:42,980 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2018-07-23 15:19:42,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:42,980 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-07-23 15:19:42,980 INFO L472 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-23 15:19:42,981 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-07-23 15:19:42,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-07-23 15:19:42,981 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:42,981 INFO L353 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1, 1] [2018-07-23 15:19:42,981 INFO L414 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:42,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1112839410, now seen corresponding path program 92 times [2018-07-23 15:19:42,982 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 1128 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:43,196 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:43,196 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-07-23 15:19:43,197 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 15:19:43,197 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 15:19:43,197 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:19:43,198 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 51 states. [2018-07-23 15:19:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:43,360 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-07-23 15:19:43,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-23 15:19:43,360 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 144 [2018-07-23 15:19:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:43,361 INFO L225 Difference]: With dead ends: 153 [2018-07-23 15:19:43,361 INFO L226 Difference]: Without dead ends: 151 [2018-07-23 15:19:43,362 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:19:43,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-07-23 15:19:43,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-07-23 15:19:43,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-07-23 15:19:43,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-07-23 15:19:43,377 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-07-23 15:19:43,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:43,378 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-07-23 15:19:43,378 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 15:19:43,378 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-07-23 15:19:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-07-23 15:19:43,378 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:43,378 INFO L353 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1, 1, 1] [2018-07-23 15:19:43,379 INFO L414 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:43,379 INFO L82 PathProgramCache]: Analyzing trace with hash -8117670, now seen corresponding path program 93 times [2018-07-23 15:19:43,379 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 2256 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:43,578 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:43,578 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-07-23 15:19:43,579 INFO L450 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-07-23 15:19:43,579 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-07-23 15:19:43,580 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:19:43,580 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 98 states. [2018-07-23 15:19:43,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:43,944 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2018-07-23 15:19:43,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-23 15:19:43,944 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 146 [2018-07-23 15:19:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:43,945 INFO L225 Difference]: With dead ends: 247 [2018-07-23 15:19:43,945 INFO L226 Difference]: Without dead ends: 148 [2018-07-23 15:19:43,947 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4897, Invalid=16273, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:19:43,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-07-23 15:19:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-07-23 15:19:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-07-23 15:19:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2018-07-23 15:19:43,959 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 146 [2018-07-23 15:19:43,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:43,959 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2018-07-23 15:19:43,959 INFO L472 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-07-23 15:19:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2018-07-23 15:19:43,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-07-23 15:19:43,960 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:43,960 INFO L353 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1, 1] [2018-07-23 15:19:43,960 INFO L414 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:43,960 INFO L82 PathProgramCache]: Analyzing trace with hash -118984301, now seen corresponding path program 94 times [2018-07-23 15:19:43,960 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:44,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 1176 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:44,099 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:44,099 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-07-23 15:19:44,099 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 15:19:44,100 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 15:19:44,100 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:19:44,100 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 52 states. [2018-07-23 15:19:44,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:44,246 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2018-07-23 15:19:44,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-23 15:19:44,247 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 147 [2018-07-23 15:19:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:44,247 INFO L225 Difference]: With dead ends: 156 [2018-07-23 15:19:44,247 INFO L226 Difference]: Without dead ends: 154 [2018-07-23 15:19:44,248 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:19:44,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-07-23 15:19:44,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2018-07-23 15:19:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-07-23 15:19:44,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2018-07-23 15:19:44,261 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2018-07-23 15:19:44,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:44,261 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2018-07-23 15:19:44,261 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 15:19:44,262 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2018-07-23 15:19:44,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-07-23 15:19:44,262 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:44,263 INFO L353 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1, 1, 1] [2018-07-23 15:19:44,263 INFO L414 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:44,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1620269755, now seen corresponding path program 95 times [2018-07-23 15:19:44,263 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 2352 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:44,474 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:44,475 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-07-23 15:19:44,475 INFO L450 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-07-23 15:19:44,475 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-07-23 15:19:44,476 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=7351, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:19:44,476 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 100 states. [2018-07-23 15:19:45,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:45,064 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2018-07-23 15:19:45,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-23 15:19:45,064 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 149 [2018-07-23 15:19:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:45,065 INFO L225 Difference]: With dead ends: 252 [2018-07-23 15:19:45,065 INFO L226 Difference]: Without dead ends: 151 [2018-07-23 15:19:45,067 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5097, Invalid=16955, Unknown=0, NotChecked=0, Total=22052 [2018-07-23 15:19:45,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-07-23 15:19:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-07-23 15:19:45,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-07-23 15:19:45,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-07-23 15:19:45,083 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 149 [2018-07-23 15:19:45,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:45,083 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-07-23 15:19:45,083 INFO L472 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-07-23 15:19:45,083 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-07-23 15:19:45,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-07-23 15:19:45,084 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:45,084 INFO L353 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1, 1] [2018-07-23 15:19:45,084 INFO L414 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:45,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1622316258, now seen corresponding path program 96 times [2018-07-23 15:19:45,084 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 1225 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:45,237 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:45,237 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-07-23 15:19:45,237 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 15:19:45,238 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 15:19:45,238 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:19:45,238 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 53 states. [2018-07-23 15:19:45,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:45,398 INFO L93 Difference]: Finished difference Result 159 states and 160 transitions. [2018-07-23 15:19:45,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-23 15:19:45,398 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 150 [2018-07-23 15:19:45,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:45,400 INFO L225 Difference]: With dead ends: 159 [2018-07-23 15:19:45,400 INFO L226 Difference]: Without dead ends: 157 [2018-07-23 15:19:45,401 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:19:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-07-23 15:19:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2018-07-23 15:19:45,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-07-23 15:19:45,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-07-23 15:19:45,423 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-07-23 15:19:45,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:45,423 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-07-23 15:19:45,423 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 15:19:45,423 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-07-23 15:19:45,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-07-23 15:19:45,424 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:45,424 INFO L353 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1] [2018-07-23 15:19:45,424 INFO L414 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:45,425 INFO L82 PathProgramCache]: Analyzing trace with hash -27138486, now seen corresponding path program 97 times [2018-07-23 15:19:45,425 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 2450 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:45,896 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:45,896 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2018-07-23 15:19:45,897 INFO L450 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-07-23 15:19:45,898 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-07-23 15:19:45,898 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:19:45,899 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 102 states. [2018-07-23 15:19:46,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:46,590 INFO L93 Difference]: Finished difference Result 257 states and 259 transitions. [2018-07-23 15:19:46,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-23 15:19:46,590 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 152 [2018-07-23 15:19:46,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:46,592 INFO L225 Difference]: With dead ends: 257 [2018-07-23 15:19:46,592 INFO L226 Difference]: Without dead ends: 154 [2018-07-23 15:19:46,593 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5301, Invalid=17651, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:19:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-07-23 15:19:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-07-23 15:19:46,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-07-23 15:19:46,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2018-07-23 15:19:46,609 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 152 [2018-07-23 15:19:46,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:46,609 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2018-07-23 15:19:46,609 INFO L472 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-07-23 15:19:46,609 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2018-07-23 15:19:46,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-07-23 15:19:46,610 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:46,610 INFO L353 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1, 1] [2018-07-23 15:19:46,610 INFO L414 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:46,610 INFO L82 PathProgramCache]: Analyzing trace with hash 810690243, now seen corresponding path program 98 times [2018-07-23 15:19:46,610 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 1275 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:46,762 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:46,762 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-07-23 15:19:46,763 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 15:19:46,763 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 15:19:46,763 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:19:46,764 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 54 states. [2018-07-23 15:19:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:46,909 INFO L93 Difference]: Finished difference Result 162 states and 163 transitions. [2018-07-23 15:19:46,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-07-23 15:19:46,910 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 153 [2018-07-23 15:19:46,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:46,911 INFO L225 Difference]: With dead ends: 162 [2018-07-23 15:19:46,911 INFO L226 Difference]: Without dead ends: 160 [2018-07-23 15:19:46,912 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:19:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-07-23 15:19:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2018-07-23 15:19:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-07-23 15:19:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2018-07-23 15:19:46,935 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 153 [2018-07-23 15:19:46,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:46,935 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2018-07-23 15:19:46,935 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 15:19:46,936 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2018-07-23 15:19:46,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-07-23 15:19:46,936 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:46,937 INFO L353 BasicCegarLoop]: trace histogram [51, 50, 50, 1, 1, 1, 1] [2018-07-23 15:19:46,937 INFO L414 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:46,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1684308971, now seen corresponding path program 99 times [2018-07-23 15:19:46,937 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 2550 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:47,250 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:47,250 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2018-07-23 15:19:47,250 INFO L450 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-07-23 15:19:47,251 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-07-23 15:19:47,251 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2755, Invalid=7957, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:19:47,251 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 104 states. [2018-07-23 15:19:47,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:47,993 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2018-07-23 15:19:47,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-07-23 15:19:47,993 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 155 [2018-07-23 15:19:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:47,994 INFO L225 Difference]: With dead ends: 262 [2018-07-23 15:19:47,994 INFO L226 Difference]: Without dead ends: 157 [2018-07-23 15:19:47,996 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3775 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5509, Invalid=18361, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:19:47,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-07-23 15:19:48,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-07-23 15:19:48,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-07-23 15:19:48,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-07-23 15:19:48,017 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 155 [2018-07-23 15:19:48,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:48,017 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-07-23 15:19:48,017 INFO L472 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-07-23 15:19:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-07-23 15:19:48,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-07-23 15:19:48,018 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:48,019 INFO L353 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1, 1] [2018-07-23 15:19:48,019 INFO L414 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:48,019 INFO L82 PathProgramCache]: Analyzing trace with hash -909949742, now seen corresponding path program 100 times [2018-07-23 15:19:48,019 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 1326 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:48,203 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:48,203 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-07-23 15:19:48,203 INFO L450 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-23 15:19:48,204 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-23 15:19:48,204 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:19:48,204 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 55 states. [2018-07-23 15:19:48,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:48,419 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-07-23 15:19:48,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-07-23 15:19:48,419 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 156 [2018-07-23 15:19:48,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:48,420 INFO L225 Difference]: With dead ends: 165 [2018-07-23 15:19:48,420 INFO L226 Difference]: Without dead ends: 163 [2018-07-23 15:19:48,421 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:19:48,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-07-23 15:19:48,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-07-23 15:19:48,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-07-23 15:19:48,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-07-23 15:19:48,444 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-07-23 15:19:48,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:48,444 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-07-23 15:19:48,444 INFO L472 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-23 15:19:48,444 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-07-23 15:19:48,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-07-23 15:19:48,445 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:48,445 INFO L353 BasicCegarLoop]: trace histogram [52, 51, 51, 1, 1, 1, 1] [2018-07-23 15:19:48,445 INFO L414 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:48,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1711692346, now seen corresponding path program 101 times [2018-07-23 15:19:48,446 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 2652 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:48,742 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:48,742 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2018-07-23 15:19:48,742 INFO L450 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-07-23 15:19:48,743 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-07-23 15:19:48,743 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:19:48,744 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 106 states. [2018-07-23 15:19:49,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:49,547 INFO L93 Difference]: Finished difference Result 267 states and 269 transitions. [2018-07-23 15:19:49,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-07-23 15:19:49,547 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 158 [2018-07-23 15:19:49,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:49,548 INFO L225 Difference]: With dead ends: 267 [2018-07-23 15:19:49,548 INFO L226 Difference]: Without dead ends: 160 [2018-07-23 15:19:49,550 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5721, Invalid=19085, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:19:49,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-07-23 15:19:49,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-07-23 15:19:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-07-23 15:19:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2018-07-23 15:19:49,575 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 158 [2018-07-23 15:19:49,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:49,575 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2018-07-23 15:19:49,575 INFO L472 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-07-23 15:19:49,575 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2018-07-23 15:19:49,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-07-23 15:19:49,576 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:49,576 INFO L353 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1, 1] [2018-07-23 15:19:49,577 INFO L414 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:49,577 INFO L82 PathProgramCache]: Analyzing trace with hash -208102413, now seen corresponding path program 102 times [2018-07-23 15:19:49,577 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 1378 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:49,846 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:49,846 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-07-23 15:19:49,846 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 15:19:49,847 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 15:19:49,847 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:19:49,847 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 56 states. [2018-07-23 15:19:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:50,051 INFO L93 Difference]: Finished difference Result 168 states and 169 transitions. [2018-07-23 15:19:50,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-07-23 15:19:50,051 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 159 [2018-07-23 15:19:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:50,052 INFO L225 Difference]: With dead ends: 168 [2018-07-23 15:19:50,052 INFO L226 Difference]: Without dead ends: 166 [2018-07-23 15:19:50,053 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2756 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:19:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-07-23 15:19:50,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2018-07-23 15:19:50,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-07-23 15:19:50,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2018-07-23 15:19:50,067 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2018-07-23 15:19:50,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:50,067 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2018-07-23 15:19:50,067 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 15:19:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2018-07-23 15:19:50,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-07-23 15:19:50,068 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:50,068 INFO L353 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1, 1, 1] [2018-07-23 15:19:50,068 INFO L414 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:50,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1877110043, now seen corresponding path program 103 times [2018-07-23 15:19:50,068 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 2756 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:50,305 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:50,305 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2018-07-23 15:19:50,306 INFO L450 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-07-23 15:19:50,306 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-07-23 15:19:50,307 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2969, Invalid=8587, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:19:50,307 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 108 states. [2018-07-23 15:19:50,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:50,722 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2018-07-23 15:19:50,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-07-23 15:19:50,722 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 161 [2018-07-23 15:19:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:50,723 INFO L225 Difference]: With dead ends: 272 [2018-07-23 15:19:50,723 INFO L226 Difference]: Without dead ends: 163 [2018-07-23 15:19:50,725 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5937, Invalid=19823, Unknown=0, NotChecked=0, Total=25760 [2018-07-23 15:19:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-07-23 15:19:50,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-07-23 15:19:50,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-07-23 15:19:50,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-07-23 15:19:50,746 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 161 [2018-07-23 15:19:50,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:50,746 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-07-23 15:19:50,747 INFO L472 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-07-23 15:19:50,747 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-07-23 15:19:50,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-07-23 15:19:50,747 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:50,747 INFO L353 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1, 1] [2018-07-23 15:19:50,748 INFO L414 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:50,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1055958210, now seen corresponding path program 104 times [2018-07-23 15:19:50,748 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 1431 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:50,898 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:50,898 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-07-23 15:19:50,898 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 15:19:50,899 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 15:19:50,899 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:19:50,899 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 57 states. [2018-07-23 15:19:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:51,069 INFO L93 Difference]: Finished difference Result 171 states and 172 transitions. [2018-07-23 15:19:51,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-23 15:19:51,069 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 162 [2018-07-23 15:19:51,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:51,070 INFO L225 Difference]: With dead ends: 171 [2018-07-23 15:19:51,070 INFO L226 Difference]: Without dead ends: 169 [2018-07-23 15:19:51,071 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:19:51,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-07-23 15:19:51,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2018-07-23 15:19:51,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-07-23 15:19:51,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-07-23 15:19:51,091 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-07-23 15:19:51,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:51,091 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-07-23 15:19:51,091 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 15:19:51,091 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-07-23 15:19:51,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-07-23 15:19:51,092 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:51,092 INFO L353 BasicCegarLoop]: trace histogram [54, 53, 53, 1, 1, 1, 1] [2018-07-23 15:19:51,093 INFO L414 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:51,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1163623978, now seen corresponding path program 105 times [2018-07-23 15:19:51,093 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 2862 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:51,373 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:51,373 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2018-07-23 15:19:51,373 INFO L450 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-07-23 15:19:51,374 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-07-23 15:19:51,375 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:19:51,375 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 110 states. [2018-07-23 15:19:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:52,218 INFO L93 Difference]: Finished difference Result 277 states and 279 transitions. [2018-07-23 15:19:52,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-23 15:19:52,218 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 164 [2018-07-23 15:19:52,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:52,219 INFO L225 Difference]: With dead ends: 277 [2018-07-23 15:19:52,219 INFO L226 Difference]: Without dead ends: 166 [2018-07-23 15:19:52,221 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6157, Invalid=20575, Unknown=0, NotChecked=0, Total=26732 [2018-07-23 15:19:52,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-07-23 15:19:52,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-07-23 15:19:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-07-23 15:19:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2018-07-23 15:19:52,239 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 164 [2018-07-23 15:19:52,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:52,239 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2018-07-23 15:19:52,239 INFO L472 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-07-23 15:19:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2018-07-23 15:19:52,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-07-23 15:19:52,240 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:52,240 INFO L353 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1, 1] [2018-07-23 15:19:52,240 INFO L414 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:52,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1931882205, now seen corresponding path program 106 times [2018-07-23 15:19:52,241 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 1485 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:52,416 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:52,416 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-07-23 15:19:52,416 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 15:19:52,416 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 15:19:52,417 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:19:52,417 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 58 states. [2018-07-23 15:19:52,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:52,556 INFO L93 Difference]: Finished difference Result 174 states and 175 transitions. [2018-07-23 15:19:52,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-07-23 15:19:52,556 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 165 [2018-07-23 15:19:52,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:52,557 INFO L225 Difference]: With dead ends: 174 [2018-07-23 15:19:52,557 INFO L226 Difference]: Without dead ends: 172 [2018-07-23 15:19:52,557 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2970 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:19:52,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-07-23 15:19:52,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2018-07-23 15:19:52,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-07-23 15:19:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2018-07-23 15:19:52,576 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2018-07-23 15:19:52,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:52,576 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2018-07-23 15:19:52,576 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 15:19:52,576 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2018-07-23 15:19:52,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-07-23 15:19:52,576 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:52,577 INFO L353 BasicCegarLoop]: trace histogram [55, 54, 54, 1, 1, 1, 1] [2018-07-23 15:19:52,577 INFO L414 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:52,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1112861109, now seen corresponding path program 107 times [2018-07-23 15:19:52,577 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 2970 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:52,841 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:52,841 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2018-07-23 15:19:52,842 INFO L450 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-07-23 15:19:52,842 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-07-23 15:19:52,843 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3191, Invalid=9241, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:19:52,843 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 112 states. [2018-07-23 15:19:53,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:53,617 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2018-07-23 15:19:53,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-07-23 15:19:53,617 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 167 [2018-07-23 15:19:53,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:53,618 INFO L225 Difference]: With dead ends: 282 [2018-07-23 15:19:53,618 INFO L226 Difference]: Without dead ends: 169 [2018-07-23 15:19:53,620 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4401 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6381, Invalid=21341, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:19:53,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-07-23 15:19:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-07-23 15:19:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-07-23 15:19:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-07-23 15:19:53,642 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 167 [2018-07-23 15:19:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:53,642 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-07-23 15:19:53,642 INFO L472 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-07-23 15:19:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-07-23 15:19:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-07-23 15:19:53,643 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:53,644 INFO L353 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1, 1] [2018-07-23 15:19:53,644 INFO L414 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:53,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2094746446, now seen corresponding path program 108 times [2018-07-23 15:19:53,644 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 1540 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:53,857 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:53,857 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-07-23 15:19:53,857 INFO L450 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-23 15:19:53,858 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-23 15:19:53,858 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:19:53,858 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 59 states. [2018-07-23 15:19:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:54,018 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-07-23 15:19:54,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-07-23 15:19:54,018 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 168 [2018-07-23 15:19:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:54,019 INFO L225 Difference]: With dead ends: 177 [2018-07-23 15:19:54,019 INFO L226 Difference]: Without dead ends: 175 [2018-07-23 15:19:54,020 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:19:54,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-07-23 15:19:54,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2018-07-23 15:19:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-07-23 15:19:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-07-23 15:19:54,037 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-07-23 15:19:54,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:54,037 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-07-23 15:19:54,037 INFO L472 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-23 15:19:54,037 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-07-23 15:19:54,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-07-23 15:19:54,038 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:54,038 INFO L353 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1, 1, 1] [2018-07-23 15:19:54,038 INFO L414 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:54,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1288393242, now seen corresponding path program 109 times [2018-07-23 15:19:54,038 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 3080 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:54,348 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:54,348 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2018-07-23 15:19:54,348 INFO L450 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-07-23 15:19:54,349 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-07-23 15:19:54,349 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3305, Invalid=9577, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:19:54,349 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 114 states. [2018-07-23 15:19:55,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:55,182 INFO L93 Difference]: Finished difference Result 287 states and 289 transitions. [2018-07-23 15:19:55,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-07-23 15:19:55,183 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 170 [2018-07-23 15:19:55,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:55,183 INFO L225 Difference]: With dead ends: 287 [2018-07-23 15:19:55,183 INFO L226 Difference]: Without dead ends: 172 [2018-07-23 15:19:55,185 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4565 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6609, Invalid=22121, Unknown=0, NotChecked=0, Total=28730 [2018-07-23 15:19:55,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-07-23 15:19:55,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-07-23 15:19:55,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-07-23 15:19:55,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2018-07-23 15:19:55,208 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 170 [2018-07-23 15:19:55,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:55,208 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2018-07-23 15:19:55,208 INFO L472 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-07-23 15:19:55,208 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2018-07-23 15:19:55,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-07-23 15:19:55,209 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:55,209 INFO L353 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1, 1] [2018-07-23 15:19:55,209 INFO L414 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:55,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1330395565, now seen corresponding path program 110 times [2018-07-23 15:19:55,209 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 1596 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:55,388 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:55,388 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-07-23 15:19:55,389 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-23 15:19:55,389 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-23 15:19:55,389 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:19:55,390 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 60 states. [2018-07-23 15:19:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:55,566 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2018-07-23 15:19:55,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-07-23 15:19:55,566 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 171 [2018-07-23 15:19:55,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:55,567 INFO L225 Difference]: With dead ends: 180 [2018-07-23 15:19:55,567 INFO L226 Difference]: Without dead ends: 178 [2018-07-23 15:19:55,568 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3192 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:19:55,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-07-23 15:19:55,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2018-07-23 15:19:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-07-23 15:19:55,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2018-07-23 15:19:55,589 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2018-07-23 15:19:55,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:55,589 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2018-07-23 15:19:55,589 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-23 15:19:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2018-07-23 15:19:55,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-07-23 15:19:55,590 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:55,590 INFO L353 BasicCegarLoop]: trace histogram [57, 56, 56, 1, 1, 1, 1] [2018-07-23 15:19:55,590 INFO L414 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:55,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1390182267, now seen corresponding path program 111 times [2018-07-23 15:19:55,590 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 3192 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:55,887 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:55,887 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115] total 115 [2018-07-23 15:19:55,888 INFO L450 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-07-23 15:19:55,888 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-07-23 15:19:55,889 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3421, Invalid=9919, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:19:55,889 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 116 states. [2018-07-23 15:19:56,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:56,878 INFO L93 Difference]: Finished difference Result 292 states and 294 transitions. [2018-07-23 15:19:56,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-07-23 15:19:56,879 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 173 [2018-07-23 15:19:56,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:56,879 INFO L225 Difference]: With dead ends: 292 [2018-07-23 15:19:56,879 INFO L226 Difference]: Without dead ends: 175 [2018-07-23 15:19:56,882 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6841, Invalid=22915, Unknown=0, NotChecked=0, Total=29756 [2018-07-23 15:19:56,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-07-23 15:19:56,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-07-23 15:19:56,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-07-23 15:19:56,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-07-23 15:19:56,915 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 173 [2018-07-23 15:19:56,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:56,915 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-07-23 15:19:56,915 INFO L472 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-07-23 15:19:56,916 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-07-23 15:19:56,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-07-23 15:19:56,916 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:56,917 INFO L353 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1, 1] [2018-07-23 15:19:56,917 INFO L414 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:56,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1161202526, now seen corresponding path program 112 times [2018-07-23 15:19:56,917 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 1653 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:57,194 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:57,194 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-07-23 15:19:57,195 INFO L450 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-23 15:19:57,195 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-23 15:19:57,195 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:19:57,195 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 61 states. [2018-07-23 15:19:57,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:57,452 INFO L93 Difference]: Finished difference Result 183 states and 184 transitions. [2018-07-23 15:19:57,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-07-23 15:19:57,452 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 174 [2018-07-23 15:19:57,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:57,453 INFO L225 Difference]: With dead ends: 183 [2018-07-23 15:19:57,453 INFO L226 Difference]: Without dead ends: 181 [2018-07-23 15:19:57,454 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3306 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:19:57,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-07-23 15:19:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2018-07-23 15:19:57,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-07-23 15:19:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-07-23 15:19:57,478 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2018-07-23 15:19:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:57,478 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-07-23 15:19:57,479 INFO L472 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-23 15:19:57,479 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-07-23 15:19:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-07-23 15:19:57,479 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:57,480 INFO L353 BasicCegarLoop]: trace histogram [58, 57, 57, 1, 1, 1, 1] [2018-07-23 15:19:57,480 INFO L414 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:57,480 INFO L82 PathProgramCache]: Analyzing trace with hash 775935498, now seen corresponding path program 113 times [2018-07-23 15:19:57,480 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 3306 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:57,764 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:57,765 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117] total 117 [2018-07-23 15:19:57,765 INFO L450 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-07-23 15:19:57,765 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-07-23 15:19:57,766 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3539, Invalid=10267, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:19:57,766 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 118 states. [2018-07-23 15:19:58,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:58,690 INFO L93 Difference]: Finished difference Result 297 states and 299 transitions. [2018-07-23 15:19:58,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-07-23 15:19:58,690 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 176 [2018-07-23 15:19:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:58,691 INFO L225 Difference]: With dead ends: 297 [2018-07-23 15:19:58,691 INFO L226 Difference]: Without dead ends: 178 [2018-07-23 15:19:58,693 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4902 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7077, Invalid=23723, Unknown=0, NotChecked=0, Total=30800 [2018-07-23 15:19:58,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-07-23 15:19:58,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-07-23 15:19:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-07-23 15:19:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2018-07-23 15:19:58,712 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 176 [2018-07-23 15:19:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:58,712 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2018-07-23 15:19:58,713 INFO L472 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-07-23 15:19:58,713 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2018-07-23 15:19:58,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-07-23 15:19:58,713 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:58,713 INFO L353 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1, 1] [2018-07-23 15:19:58,713 INFO L414 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:58,713 INFO L82 PathProgramCache]: Analyzing trace with hash 507804547, now seen corresponding path program 114 times [2018-07-23 15:19:58,714 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 1711 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:58,970 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:58,970 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-07-23 15:19:58,971 INFO L450 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-23 15:19:58,971 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-23 15:19:58,972 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:19:58,972 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 62 states. [2018-07-23 15:19:59,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:59,152 INFO L93 Difference]: Finished difference Result 186 states and 187 transitions. [2018-07-23 15:19:59,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-07-23 15:19:59,152 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 177 [2018-07-23 15:19:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:59,153 INFO L225 Difference]: With dead ends: 186 [2018-07-23 15:19:59,153 INFO L226 Difference]: Without dead ends: 184 [2018-07-23 15:19:59,153 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3422 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:19:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-07-23 15:19:59,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2018-07-23 15:19:59,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-07-23 15:19:59,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2018-07-23 15:19:59,169 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 177 [2018-07-23 15:19:59,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:59,169 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2018-07-23 15:19:59,169 INFO L472 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-23 15:19:59,169 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2018-07-23 15:19:59,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-07-23 15:19:59,170 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:59,170 INFO L353 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1, 1, 1] [2018-07-23 15:19:59,170 INFO L414 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:59,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1626036053, now seen corresponding path program 115 times [2018-07-23 15:19:59,171 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 3422 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:59,488 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:59,488 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119] total 119 [2018-07-23 15:19:59,488 INFO L450 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-07-23 15:19:59,489 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-07-23 15:19:59,489 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3659, Invalid=10621, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:19:59,489 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 120 states. [2018-07-23 15:20:00,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:00,263 INFO L93 Difference]: Finished difference Result 302 states and 304 transitions. [2018-07-23 15:20:00,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-07-23 15:20:00,263 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 179 [2018-07-23 15:20:00,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:00,263 INFO L225 Difference]: With dead ends: 302 [2018-07-23 15:20:00,263 INFO L226 Difference]: Without dead ends: 181 [2018-07-23 15:20:00,266 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5075 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=7317, Invalid=24545, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:20:00,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-07-23 15:20:00,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-07-23 15:20:00,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-07-23 15:20:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-07-23 15:20:00,289 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 179 [2018-07-23 15:20:00,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:00,289 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-07-23 15:20:00,289 INFO L472 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-07-23 15:20:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-07-23 15:20:00,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-07-23 15:20:00,290 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:00,290 INFO L353 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1, 1] [2018-07-23 15:20:00,290 INFO L414 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:00,290 INFO L82 PathProgramCache]: Analyzing trace with hash -876026734, now seen corresponding path program 116 times [2018-07-23 15:20:00,291 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 1770 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:00,490 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:00,490 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-07-23 15:20:00,490 INFO L450 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-23 15:20:00,490 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-23 15:20:00,490 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:20:00,491 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 63 states. [2018-07-23 15:20:00,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:00,681 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2018-07-23 15:20:00,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-07-23 15:20:00,681 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 180 [2018-07-23 15:20:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:00,682 INFO L225 Difference]: With dead ends: 189 [2018-07-23 15:20:00,682 INFO L226 Difference]: Without dead ends: 187 [2018-07-23 15:20:00,683 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2018-07-23 15:20:00,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-07-23 15:20:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2018-07-23 15:20:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-07-23 15:20:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-07-23 15:20:00,699 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2018-07-23 15:20:00,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:00,699 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-07-23 15:20:00,699 INFO L472 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-23 15:20:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-07-23 15:20:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-07-23 15:20:00,700 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:00,701 INFO L353 BasicCegarLoop]: trace histogram [60, 59, 59, 1, 1, 1, 1] [2018-07-23 15:20:00,701 INFO L414 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash -48035334, now seen corresponding path program 117 times [2018-07-23 15:20:00,701 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5310 backedges. 3540 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:01,109 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:01,109 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121] total 121 [2018-07-23 15:20:01,109 INFO L450 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-07-23 15:20:01,109 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-07-23 15:20:01,110 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:20:01,110 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 122 states. [2018-07-23 15:20:01,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:01,764 INFO L93 Difference]: Finished difference Result 307 states and 309 transitions. [2018-07-23 15:20:01,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-07-23 15:20:01,765 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 182 [2018-07-23 15:20:01,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:01,765 INFO L225 Difference]: With dead ends: 307 [2018-07-23 15:20:01,765 INFO L226 Difference]: Without dead ends: 184 [2018-07-23 15:20:01,767 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=7561, Invalid=25381, Unknown=0, NotChecked=0, Total=32942 [2018-07-23 15:20:01,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-07-23 15:20:01,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-07-23 15:20:01,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-07-23 15:20:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2018-07-23 15:20:01,794 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 182 [2018-07-23 15:20:01,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:01,794 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2018-07-23 15:20:01,794 INFO L472 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-07-23 15:20:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2018-07-23 15:20:01,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-07-23 15:20:01,796 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:01,796 INFO L353 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1, 1] [2018-07-23 15:20:01,796 INFO L414 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:01,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1059713203, now seen corresponding path program 118 times [2018-07-23 15:20:01,796 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 1830 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:02,041 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:02,041 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-07-23 15:20:02,041 INFO L450 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-23 15:20:02,042 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-23 15:20:02,042 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:20:02,042 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 64 states. [2018-07-23 15:20:02,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:02,247 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2018-07-23 15:20:02,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-07-23 15:20:02,247 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 183 [2018-07-23 15:20:02,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:02,248 INFO L225 Difference]: With dead ends: 192 [2018-07-23 15:20:02,248 INFO L226 Difference]: Without dead ends: 190 [2018-07-23 15:20:02,250 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3660 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:20:02,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-07-23 15:20:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2018-07-23 15:20:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-07-23 15:20:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2018-07-23 15:20:02,275 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 183 [2018-07-23 15:20:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:02,275 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2018-07-23 15:20:02,275 INFO L472 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-23 15:20:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2018-07-23 15:20:02,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-07-23 15:20:02,276 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:02,276 INFO L353 BasicCegarLoop]: trace histogram [61, 60, 60, 1, 1, 1, 1] [2018-07-23 15:20:02,276 INFO L414 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:02,276 INFO L82 PathProgramCache]: Analyzing trace with hash 477204955, now seen corresponding path program 119 times [2018-07-23 15:20:02,276 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5490 backedges. 3660 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:02,665 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:02,666 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123] total 123 [2018-07-23 15:20:02,666 INFO L450 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-07-23 15:20:02,667 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-07-23 15:20:02,667 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3905, Invalid=11347, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:20:02,668 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 124 states. [2018-07-23 15:20:03,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:03,495 INFO L93 Difference]: Finished difference Result 312 states and 314 transitions. [2018-07-23 15:20:03,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-07-23 15:20:03,495 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 185 [2018-07-23 15:20:03,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:03,496 INFO L225 Difference]: With dead ends: 312 [2018-07-23 15:20:03,496 INFO L226 Difference]: Without dead ends: 187 [2018-07-23 15:20:03,499 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5430 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=7809, Invalid=26231, Unknown=0, NotChecked=0, Total=34040 [2018-07-23 15:20:03,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-07-23 15:20:03,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-07-23 15:20:03,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-07-23 15:20:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-07-23 15:20:03,525 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 185 [2018-07-23 15:20:03,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:03,525 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-07-23 15:20:03,525 INFO L472 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-07-23 15:20:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-07-23 15:20:03,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-07-23 15:20:03,526 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:03,527 INFO L353 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1, 1] [2018-07-23 15:20:03,527 INFO L414 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:03,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1114831742, now seen corresponding path program 120 times [2018-07-23 15:20:03,527 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 1891 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:03,748 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:03,749 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-07-23 15:20:03,749 INFO L450 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-23 15:20:03,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-23 15:20:03,749 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:20:03,750 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 65 states. [2018-07-23 15:20:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:03,939 INFO L93 Difference]: Finished difference Result 195 states and 196 transitions. [2018-07-23 15:20:03,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-07-23 15:20:03,940 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 186 [2018-07-23 15:20:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:03,940 INFO L225 Difference]: With dead ends: 195 [2018-07-23 15:20:03,940 INFO L226 Difference]: Without dead ends: 193 [2018-07-23 15:20:03,941 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:20:03,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-07-23 15:20:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2018-07-23 15:20:03,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-07-23 15:20:03,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-07-23 15:20:03,957 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-07-23 15:20:03,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:03,958 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-07-23 15:20:03,958 INFO L472 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-23 15:20:03,958 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-07-23 15:20:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-07-23 15:20:03,958 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:03,958 INFO L353 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1, 1, 1] [2018-07-23 15:20:03,958 INFO L414 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:03,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1906381334, now seen corresponding path program 121 times [2018-07-23 15:20:03,959 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5673 backedges. 3782 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:04,301 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:04,301 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125] total 125 [2018-07-23 15:20:04,301 INFO L450 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-07-23 15:20:04,302 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-07-23 15:20:04,302 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4031, Invalid=11719, Unknown=0, NotChecked=0, Total=15750 [2018-07-23 15:20:04,302 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 126 states. [2018-07-23 15:20:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:05,008 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2018-07-23 15:20:05,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-07-23 15:20:05,008 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 188 [2018-07-23 15:20:05,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:05,008 INFO L225 Difference]: With dead ends: 317 [2018-07-23 15:20:05,009 INFO L226 Difference]: Without dead ends: 190 [2018-07-23 15:20:05,010 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5612 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=8061, Invalid=27095, Unknown=0, NotChecked=0, Total=35156 [2018-07-23 15:20:05,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-07-23 15:20:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-07-23 15:20:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-07-23 15:20:05,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2018-07-23 15:20:05,034 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 188 [2018-07-23 15:20:05,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:05,034 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2018-07-23 15:20:05,034 INFO L472 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-07-23 15:20:05,034 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2018-07-23 15:20:05,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-07-23 15:20:05,035 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:05,035 INFO L353 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1, 1] [2018-07-23 15:20:05,035 INFO L414 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:05,036 INFO L82 PathProgramCache]: Analyzing trace with hash -947771933, now seen corresponding path program 122 times [2018-07-23 15:20:05,036 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 1953 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:05,353 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:05,353 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-07-23 15:20:05,353 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-23 15:20:05,354 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-23 15:20:05,354 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:20:05,354 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 66 states. [2018-07-23 15:20:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:05,645 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2018-07-23 15:20:05,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-07-23 15:20:05,646 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 189 [2018-07-23 15:20:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:05,646 INFO L225 Difference]: With dead ends: 198 [2018-07-23 15:20:05,646 INFO L226 Difference]: Without dead ends: 196 [2018-07-23 15:20:05,648 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2018-07-23 15:20:05,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-07-23 15:20:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2018-07-23 15:20:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-07-23 15:20:05,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2018-07-23 15:20:05,736 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2018-07-23 15:20:05,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:05,736 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2018-07-23 15:20:05,736 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-23 15:20:05,736 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2018-07-23 15:20:05,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-07-23 15:20:05,737 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:05,737 INFO L353 BasicCegarLoop]: trace histogram [63, 62, 62, 1, 1, 1, 1] [2018-07-23 15:20:05,737 INFO L414 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:05,751 INFO L82 PathProgramCache]: Analyzing trace with hash -275694837, now seen corresponding path program 123 times [2018-07-23 15:20:05,752 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 3906 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:06,102 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:06,103 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127] total 127 [2018-07-23 15:20:06,103 INFO L450 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-07-23 15:20:06,103 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-07-23 15:20:06,104 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4159, Invalid=12097, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:20:06,104 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 128 states. [2018-07-23 15:20:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:06,842 INFO L93 Difference]: Finished difference Result 322 states and 324 transitions. [2018-07-23 15:20:06,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-07-23 15:20:06,842 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 191 [2018-07-23 15:20:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:06,842 INFO L225 Difference]: With dead ends: 322 [2018-07-23 15:20:06,843 INFO L226 Difference]: Without dead ends: 193 [2018-07-23 15:20:06,845 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5797 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=8317, Invalid=27973, Unknown=0, NotChecked=0, Total=36290 [2018-07-23 15:20:06,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-07-23 15:20:06,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-07-23 15:20:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-07-23 15:20:06,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-07-23 15:20:06,872 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 191 [2018-07-23 15:20:06,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:06,872 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-07-23 15:20:06,872 INFO L472 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-07-23 15:20:06,873 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-07-23 15:20:06,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-07-23 15:20:06,873 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:06,874 INFO L353 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1, 1] [2018-07-23 15:20:06,874 INFO L414 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:06,874 INFO L82 PathProgramCache]: Analyzing trace with hash 419419250, now seen corresponding path program 124 times [2018-07-23 15:20:06,874 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 2016 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:07,112 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:07,112 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-07-23 15:20:07,113 INFO L450 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-23 15:20:07,113 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-23 15:20:07,113 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:20:07,114 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 67 states. [2018-07-23 15:20:07,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:07,347 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2018-07-23 15:20:07,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-07-23 15:20:07,347 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 192 [2018-07-23 15:20:07,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:07,348 INFO L225 Difference]: With dead ends: 201 [2018-07-23 15:20:07,348 INFO L226 Difference]: Without dead ends: 199 [2018-07-23 15:20:07,349 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2018-07-23 15:20:07,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-07-23 15:20:07,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-07-23 15:20:07,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-07-23 15:20:07,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-07-23 15:20:07,382 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-07-23 15:20:07,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:07,382 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-07-23 15:20:07,382 INFO L472 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-23 15:20:07,382 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-07-23 15:20:07,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-07-23 15:20:07,383 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:07,384 INFO L353 BasicCegarLoop]: trace histogram [64, 63, 63, 1, 1, 1, 1] [2018-07-23 15:20:07,384 INFO L414 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:07,384 INFO L82 PathProgramCache]: Analyzing trace with hash -664960550, now seen corresponding path program 125 times [2018-07-23 15:20:07,384 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 4032 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:07,919 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:07,919 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129] total 129 [2018-07-23 15:20:07,919 INFO L450 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-07-23 15:20:07,920 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-07-23 15:20:07,921 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4289, Invalid=12481, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:20:07,921 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 130 states. [2018-07-23 15:20:08,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:08,609 INFO L93 Difference]: Finished difference Result 327 states and 329 transitions. [2018-07-23 15:20:08,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-07-23 15:20:08,609 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 194 [2018-07-23 15:20:08,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:08,609 INFO L225 Difference]: With dead ends: 327 [2018-07-23 15:20:08,609 INFO L226 Difference]: Without dead ends: 196 [2018-07-23 15:20:08,612 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5985 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=8577, Invalid=28865, Unknown=0, NotChecked=0, Total=37442 [2018-07-23 15:20:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-07-23 15:20:08,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-07-23 15:20:08,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-07-23 15:20:08,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2018-07-23 15:20:08,636 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 194 [2018-07-23 15:20:08,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:08,636 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2018-07-23 15:20:08,636 INFO L472 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-07-23 15:20:08,636 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2018-07-23 15:20:08,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-07-23 15:20:08,637 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:08,637 INFO L353 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1, 1] [2018-07-23 15:20:08,637 INFO L414 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:08,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1441471251, now seen corresponding path program 126 times [2018-07-23 15:20:08,638 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 2080 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:08,871 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:08,871 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-07-23 15:20:08,871 INFO L450 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-23 15:20:08,872 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-23 15:20:08,872 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:20:08,872 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand 68 states. [2018-07-23 15:20:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:09,114 INFO L93 Difference]: Finished difference Result 204 states and 205 transitions. [2018-07-23 15:20:09,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-07-23 15:20:09,114 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 195 [2018-07-23 15:20:09,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:09,115 INFO L225 Difference]: With dead ends: 204 [2018-07-23 15:20:09,115 INFO L226 Difference]: Without dead ends: 202 [2018-07-23 15:20:09,117 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2018-07-23 15:20:09,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-07-23 15:20:09,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2018-07-23 15:20:09,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-07-23 15:20:09,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2018-07-23 15:20:09,143 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2018-07-23 15:20:09,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:09,143 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2018-07-23 15:20:09,143 INFO L472 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-23 15:20:09,143 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2018-07-23 15:20:09,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-07-23 15:20:09,144 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:09,144 INFO L353 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1, 1, 1] [2018-07-23 15:20:09,144 INFO L414 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:09,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2020498373, now seen corresponding path program 127 times [2018-07-23 15:20:09,145 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 4160 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:09,516 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:09,516 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131] total 131 [2018-07-23 15:20:09,517 INFO L450 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-07-23 15:20:09,518 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-07-23 15:20:09,519 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4421, Invalid=12871, Unknown=0, NotChecked=0, Total=17292 [2018-07-23 15:20:09,519 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 132 states. [2018-07-23 15:20:10,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:10,254 INFO L93 Difference]: Finished difference Result 332 states and 334 transitions. [2018-07-23 15:20:10,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-07-23 15:20:10,255 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 197 [2018-07-23 15:20:10,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:10,255 INFO L225 Difference]: With dead ends: 332 [2018-07-23 15:20:10,255 INFO L226 Difference]: Without dead ends: 199 [2018-07-23 15:20:10,257 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=8841, Invalid=29771, Unknown=0, NotChecked=0, Total=38612 [2018-07-23 15:20:10,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-07-23 15:20:10,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-07-23 15:20:10,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-07-23 15:20:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-07-23 15:20:10,280 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 197 [2018-07-23 15:20:10,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:10,280 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-07-23 15:20:10,280 INFO L472 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-07-23 15:20:10,280 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-07-23 15:20:10,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-07-23 15:20:10,281 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:10,281 INFO L353 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1, 1] [2018-07-23 15:20:10,282 INFO L414 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:10,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1217090658, now seen corresponding path program 128 times [2018-07-23 15:20:10,282 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 2145 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:10,539 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:10,539 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-07-23 15:20:10,539 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-23 15:20:10,540 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-23 15:20:10,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:20:10,540 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 69 states. [2018-07-23 15:20:10,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:10,739 INFO L93 Difference]: Finished difference Result 207 states and 208 transitions. [2018-07-23 15:20:10,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-07-23 15:20:10,740 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 198 [2018-07-23 15:20:10,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:10,740 INFO L225 Difference]: With dead ends: 207 [2018-07-23 15:20:10,740 INFO L226 Difference]: Without dead ends: 205 [2018-07-23 15:20:10,742 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2018-07-23 15:20:10,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-07-23 15:20:10,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2018-07-23 15:20:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-07-23 15:20:10,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-07-23 15:20:10,768 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2018-07-23 15:20:10,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:10,769 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-07-23 15:20:10,769 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-23 15:20:10,769 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-07-23 15:20:10,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-07-23 15:20:10,770 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:10,770 INFO L353 BasicCegarLoop]: trace histogram [66, 65, 65, 1, 1, 1, 1] [2018-07-23 15:20:10,770 INFO L414 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:10,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1393083850, now seen corresponding path program 129 times [2018-07-23 15:20:10,770 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 4290 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:11,166 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:11,167 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133] total 133 [2018-07-23 15:20:11,167 INFO L450 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-07-23 15:20:11,168 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-07-23 15:20:11,169 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4555, Invalid=13267, Unknown=0, NotChecked=0, Total=17822 [2018-07-23 15:20:11,169 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 134 states. [2018-07-23 15:20:11,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:11,983 INFO L93 Difference]: Finished difference Result 337 states and 339 transitions. [2018-07-23 15:20:11,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-07-23 15:20:11,983 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 200 [2018-07-23 15:20:11,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:11,984 INFO L225 Difference]: With dead ends: 337 [2018-07-23 15:20:11,984 INFO L226 Difference]: Without dead ends: 202 [2018-07-23 15:20:11,987 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6370 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9109, Invalid=30691, Unknown=0, NotChecked=0, Total=39800 [2018-07-23 15:20:11,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-07-23 15:20:12,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-07-23 15:20:12,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-07-23 15:20:12,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2018-07-23 15:20:12,013 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 200 [2018-07-23 15:20:12,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:12,013 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2018-07-23 15:20:12,013 INFO L472 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-07-23 15:20:12,013 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2018-07-23 15:20:12,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-07-23 15:20:12,014 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:12,014 INFO L353 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1, 1] [2018-07-23 15:20:12,014 INFO L414 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:12,014 INFO L82 PathProgramCache]: Analyzing trace with hash 327340099, now seen corresponding path program 130 times [2018-07-23 15:20:12,014 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 2211 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:12,266 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:12,267 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-07-23 15:20:12,267 INFO L450 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-23 15:20:12,267 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-23 15:20:12,267 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:20:12,268 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 70 states. [2018-07-23 15:20:12,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:12,492 INFO L93 Difference]: Finished difference Result 210 states and 211 transitions. [2018-07-23 15:20:12,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-07-23 15:20:12,492 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 201 [2018-07-23 15:20:12,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:12,492 INFO L225 Difference]: With dead ends: 210 [2018-07-23 15:20:12,492 INFO L226 Difference]: Without dead ends: 208 [2018-07-23 15:20:12,493 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4422 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2018-07-23 15:20:12,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-07-23 15:20:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-07-23 15:20:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-07-23 15:20:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2018-07-23 15:20:12,512 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2018-07-23 15:20:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:12,512 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2018-07-23 15:20:12,512 INFO L472 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-23 15:20:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2018-07-23 15:20:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-07-23 15:20:12,513 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:12,513 INFO L353 BasicCegarLoop]: trace histogram [67, 66, 66, 1, 1, 1, 1] [2018-07-23 15:20:12,513 INFO L414 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:12,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1041288555, now seen corresponding path program 131 times [2018-07-23 15:20:12,514 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 4422 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:12,914 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:12,915 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135] total 135 [2018-07-23 15:20:12,915 INFO L450 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-07-23 15:20:12,916 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-07-23 15:20:12,916 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4691, Invalid=13669, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:20:12,917 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 136 states. [2018-07-23 15:20:13,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:13,760 INFO L93 Difference]: Finished difference Result 342 states and 344 transitions. [2018-07-23 15:20:13,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-07-23 15:20:13,760 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 203 [2018-07-23 15:20:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:13,761 INFO L225 Difference]: With dead ends: 342 [2018-07-23 15:20:13,761 INFO L226 Difference]: Without dead ends: 205 [2018-07-23 15:20:13,763 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6567 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9381, Invalid=31625, Unknown=0, NotChecked=0, Total=41006 [2018-07-23 15:20:13,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-07-23 15:20:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-07-23 15:20:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-07-23 15:20:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2018-07-23 15:20:13,782 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 203 [2018-07-23 15:20:13,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:13,782 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2018-07-23 15:20:13,782 INFO L472 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-07-23 15:20:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2018-07-23 15:20:13,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-07-23 15:20:13,783 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:13,783 INFO L353 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1, 1] [2018-07-23 15:20:13,783 INFO L414 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:13,783 INFO L82 PathProgramCache]: Analyzing trace with hash -132545454, now seen corresponding path program 132 times [2018-07-23 15:20:13,783 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 2278 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:14,144 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:14,144 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-07-23 15:20:14,144 INFO L450 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-23 15:20:14,146 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-23 15:20:14,146 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:20:14,147 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 71 states. [2018-07-23 15:20:14,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:14,392 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2018-07-23 15:20:14,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-07-23 15:20:14,392 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 204 [2018-07-23 15:20:14,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:14,393 INFO L225 Difference]: With dead ends: 213 [2018-07-23 15:20:14,393 INFO L226 Difference]: Without dead ends: 211 [2018-07-23 15:20:14,395 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4556 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 15:20:14,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-07-23 15:20:14,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2018-07-23 15:20:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-07-23 15:20:14,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-07-23 15:20:14,425 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 204 [2018-07-23 15:20:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:14,425 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-07-23 15:20:14,425 INFO L472 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-23 15:20:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-07-23 15:20:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-07-23 15:20:14,426 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:14,427 INFO L353 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1, 1, 1] [2018-07-23 15:20:14,427 INFO L414 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:14,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1472903610, now seen corresponding path program 133 times [2018-07-23 15:20:14,427 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 4556 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:14,815 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:14,815 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137] total 137 [2018-07-23 15:20:14,816 INFO L450 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-07-23 15:20:14,816 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-07-23 15:20:14,817 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4829, Invalid=14077, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:20:14,817 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 138 states. [2018-07-23 15:20:15,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:15,329 INFO L93 Difference]: Finished difference Result 347 states and 349 transitions. [2018-07-23 15:20:15,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-07-23 15:20:15,329 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 206 [2018-07-23 15:20:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:15,329 INFO L225 Difference]: With dead ends: 347 [2018-07-23 15:20:15,330 INFO L226 Difference]: Without dead ends: 208 [2018-07-23 15:20:15,332 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6767 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9657, Invalid=32573, Unknown=0, NotChecked=0, Total=42230 [2018-07-23 15:20:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-07-23 15:20:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-07-23 15:20:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-07-23 15:20:15,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2018-07-23 15:20:15,362 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 206 [2018-07-23 15:20:15,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:15,363 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2018-07-23 15:20:15,363 INFO L472 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-07-23 15:20:15,363 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2018-07-23 15:20:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-07-23 15:20:15,364 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:15,364 INFO L353 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1, 1] [2018-07-23 15:20:15,364 INFO L414 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:15,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1407665523, now seen corresponding path program 134 times [2018-07-23 15:20:15,364 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 2346 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:15,666 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:15,666 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-07-23 15:20:15,666 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 15:20:15,666 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 15:20:15,666 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:20:15,667 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand 72 states. [2018-07-23 15:20:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:15,906 INFO L93 Difference]: Finished difference Result 216 states and 217 transitions. [2018-07-23 15:20:15,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-07-23 15:20:15,907 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 207 [2018-07-23 15:20:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:15,907 INFO L225 Difference]: With dead ends: 216 [2018-07-23 15:20:15,907 INFO L226 Difference]: Without dead ends: 214 [2018-07-23 15:20:15,909 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4692 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2018-07-23 15:20:15,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-07-23 15:20:15,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2018-07-23 15:20:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-07-23 15:20:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2018-07-23 15:20:15,928 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 207 [2018-07-23 15:20:15,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:15,929 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2018-07-23 15:20:15,929 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 15:20:15,929 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2018-07-23 15:20:15,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-07-23 15:20:15,929 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:15,930 INFO L353 BasicCegarLoop]: trace histogram [69, 68, 68, 1, 1, 1, 1] [2018-07-23 15:20:15,930 INFO L414 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:15,930 INFO L82 PathProgramCache]: Analyzing trace with hash -148064613, now seen corresponding path program 135 times [2018-07-23 15:20:15,930 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 4692 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:16,335 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:16,335 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139] total 139 [2018-07-23 15:20:16,335 INFO L450 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-07-23 15:20:16,336 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-07-23 15:20:16,337 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4969, Invalid=14491, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:20:16,337 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand 140 states. [2018-07-23 15:20:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:17,228 INFO L93 Difference]: Finished difference Result 352 states and 354 transitions. [2018-07-23 15:20:17,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-07-23 15:20:17,228 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 209 [2018-07-23 15:20:17,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:17,228 INFO L225 Difference]: With dead ends: 352 [2018-07-23 15:20:17,229 INFO L226 Difference]: Without dead ends: 211 [2018-07-23 15:20:17,231 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6970 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9937, Invalid=33535, Unknown=0, NotChecked=0, Total=43472 [2018-07-23 15:20:17,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-07-23 15:20:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-07-23 15:20:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-07-23 15:20:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2018-07-23 15:20:17,255 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 209 [2018-07-23 15:20:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:17,255 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2018-07-23 15:20:17,255 INFO L472 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-07-23 15:20:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2018-07-23 15:20:17,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-07-23 15:20:17,256 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:17,256 INFO L353 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1, 1] [2018-07-23 15:20:17,256 INFO L414 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:17,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1964270658, now seen corresponding path program 136 times [2018-07-23 15:20:17,257 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 2415 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:17,535 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:17,535 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-07-23 15:20:17,535 INFO L450 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-23 15:20:17,536 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-23 15:20:17,536 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:20:17,536 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 73 states. [2018-07-23 15:20:17,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:17,804 INFO L93 Difference]: Finished difference Result 219 states and 220 transitions. [2018-07-23 15:20:17,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-07-23 15:20:17,804 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 210 [2018-07-23 15:20:17,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:17,804 INFO L225 Difference]: With dead ends: 219 [2018-07-23 15:20:17,804 INFO L226 Difference]: Without dead ends: 217 [2018-07-23 15:20:17,806 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4830 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2018-07-23 15:20:17,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-07-23 15:20:17,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 213. [2018-07-23 15:20:17,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-07-23 15:20:17,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2018-07-23 15:20:17,826 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 210 [2018-07-23 15:20:17,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:17,827 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2018-07-23 15:20:17,827 INFO L472 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-23 15:20:17,827 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2018-07-23 15:20:17,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-07-23 15:20:17,827 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:17,827 INFO L353 BasicCegarLoop]: trace histogram [70, 69, 69, 1, 1, 1, 1] [2018-07-23 15:20:17,828 INFO L414 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:17,828 INFO L82 PathProgramCache]: Analyzing trace with hash -2121441878, now seen corresponding path program 137 times [2018-07-23 15:20:17,828 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7245 backedges. 4830 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:18,285 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:18,286 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141] total 141 [2018-07-23 15:20:18,286 INFO L450 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-07-23 15:20:18,287 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-07-23 15:20:18,287 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5111, Invalid=14911, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:20:18,288 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand 142 states. [2018-07-23 15:20:19,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:19,230 INFO L93 Difference]: Finished difference Result 357 states and 359 transitions. [2018-07-23 15:20:19,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-07-23 15:20:19,230 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 212 [2018-07-23 15:20:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:19,231 INFO L225 Difference]: With dead ends: 357 [2018-07-23 15:20:19,231 INFO L226 Difference]: Without dead ends: 214 [2018-07-23 15:20:19,234 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=10221, Invalid=34511, Unknown=0, NotChecked=0, Total=44732 [2018-07-23 15:20:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-07-23 15:20:19,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-07-23 15:20:19,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-07-23 15:20:19,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2018-07-23 15:20:19,254 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 212 [2018-07-23 15:20:19,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:19,254 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2018-07-23 15:20:19,254 INFO L472 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-07-23 15:20:19,254 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2018-07-23 15:20:19,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-07-23 15:20:19,255 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:19,255 INFO L353 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1, 1] [2018-07-23 15:20:19,255 INFO L414 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:19,255 INFO L82 PathProgramCache]: Analyzing trace with hash 892762787, now seen corresponding path program 138 times [2018-07-23 15:20:19,255 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 2485 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:19,536 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:19,536 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-07-23 15:20:19,536 INFO L450 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-23 15:20:19,537 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-23 15:20:19,537 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:20:19,537 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 74 states. [2018-07-23 15:20:19,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:19,774 INFO L93 Difference]: Finished difference Result 222 states and 223 transitions. [2018-07-23 15:20:19,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-07-23 15:20:19,774 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 213 [2018-07-23 15:20:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:19,775 INFO L225 Difference]: With dead ends: 222 [2018-07-23 15:20:19,775 INFO L226 Difference]: Without dead ends: 220 [2018-07-23 15:20:19,776 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4970 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 15:20:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-07-23 15:20:19,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2018-07-23 15:20:19,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-07-23 15:20:19,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2018-07-23 15:20:19,801 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 213 [2018-07-23 15:20:19,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:19,801 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2018-07-23 15:20:19,801 INFO L472 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-23 15:20:19,801 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2018-07-23 15:20:19,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-07-23 15:20:19,802 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:19,802 INFO L353 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1, 1, 1] [2018-07-23 15:20:19,802 INFO L414 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:19,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1048354869, now seen corresponding path program 139 times [2018-07-23 15:20:19,803 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7455 backedges. 4970 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:20,243 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:20,243 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143] total 143 [2018-07-23 15:20:20,244 INFO L450 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-07-23 15:20:20,244 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-07-23 15:20:20,245 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=15337, Unknown=0, NotChecked=0, Total=20592 [2018-07-23 15:20:20,245 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand 144 states. [2018-07-23 15:20:20,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:20,976 INFO L93 Difference]: Finished difference Result 362 states and 364 transitions. [2018-07-23 15:20:20,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-07-23 15:20:20,976 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 215 [2018-07-23 15:20:20,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:20,976 INFO L225 Difference]: With dead ends: 362 [2018-07-23 15:20:20,976 INFO L226 Difference]: Without dead ends: 217 [2018-07-23 15:20:20,979 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7385 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=10509, Invalid=35501, Unknown=0, NotChecked=0, Total=46010 [2018-07-23 15:20:20,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-07-23 15:20:20,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-07-23 15:20:20,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-07-23 15:20:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2018-07-23 15:20:20,999 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 215 [2018-07-23 15:20:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:20,999 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2018-07-23 15:20:20,999 INFO L472 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-07-23 15:20:20,999 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2018-07-23 15:20:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-07-23 15:20:21,000 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:21,000 INFO L353 BasicCegarLoop]: trace histogram [71, 71, 70, 1, 1, 1, 1] [2018-07-23 15:20:21,000 INFO L414 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:21,000 INFO L82 PathProgramCache]: Analyzing trace with hash 241562674, now seen corresponding path program 140 times [2018-07-23 15:20:21,001 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 2556 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:21,292 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:21,292 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-07-23 15:20:21,292 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-23 15:20:21,292 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-23 15:20:21,293 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:20:21,293 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 75 states. [2018-07-23 15:20:21,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:21,576 INFO L93 Difference]: Finished difference Result 225 states and 226 transitions. [2018-07-23 15:20:21,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-07-23 15:20:21,577 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 216 [2018-07-23 15:20:21,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:21,578 INFO L225 Difference]: With dead ends: 225 [2018-07-23 15:20:21,578 INFO L226 Difference]: Without dead ends: 223 [2018-07-23 15:20:21,579 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2018-07-23 15:20:21,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-07-23 15:20:21,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-07-23 15:20:21,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-07-23 15:20:21,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2018-07-23 15:20:21,606 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 216 [2018-07-23 15:20:21,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:21,606 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2018-07-23 15:20:21,606 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-23 15:20:21,606 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2018-07-23 15:20:21,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-07-23 15:20:21,607 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:21,607 INFO L353 BasicCegarLoop]: trace histogram [72, 71, 71, 1, 1, 1, 1] [2018-07-23 15:20:21,607 INFO L414 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:21,607 INFO L82 PathProgramCache]: Analyzing trace with hash 213561754, now seen corresponding path program 141 times [2018-07-23 15:20:21,607 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7668 backedges. 5112 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:22,086 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:22,086 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145] total 145 [2018-07-23 15:20:22,086 INFO L450 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-07-23 15:20:22,087 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-07-23 15:20:22,088 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5401, Invalid=15769, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:20:22,088 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 146 states. [2018-07-23 15:20:22,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:22,713 INFO L93 Difference]: Finished difference Result 367 states and 369 transitions. [2018-07-23 15:20:22,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-07-23 15:20:22,713 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 218 [2018-07-23 15:20:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:22,714 INFO L225 Difference]: With dead ends: 367 [2018-07-23 15:20:22,714 INFO L226 Difference]: Without dead ends: 220 [2018-07-23 15:20:22,716 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7597 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=10801, Invalid=36505, Unknown=0, NotChecked=0, Total=47306 [2018-07-23 15:20:22,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-07-23 15:20:22,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2018-07-23 15:20:22,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-07-23 15:20:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2018-07-23 15:20:22,737 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 218 [2018-07-23 15:20:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:22,737 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2018-07-23 15:20:22,737 INFO L472 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-07-23 15:20:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2018-07-23 15:20:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-07-23 15:20:22,738 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:22,738 INFO L353 BasicCegarLoop]: trace histogram [72, 72, 71, 1, 1, 1, 1] [2018-07-23 15:20:22,738 INFO L414 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:22,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1074687955, now seen corresponding path program 142 times [2018-07-23 15:20:22,738 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 2628 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:23,011 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:23,011 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-07-23 15:20:23,011 INFO L450 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-23 15:20:23,012 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-23 15:20:23,012 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:20:23,012 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand 76 states. [2018-07-23 15:20:23,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:23,267 INFO L93 Difference]: Finished difference Result 228 states and 229 transitions. [2018-07-23 15:20:23,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-07-23 15:20:23,267 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 219 [2018-07-23 15:20:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:23,268 INFO L225 Difference]: With dead ends: 228 [2018-07-23 15:20:23,268 INFO L226 Difference]: Without dead ends: 226 [2018-07-23 15:20:23,269 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2018-07-23 15:20:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-07-23 15:20:23,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2018-07-23 15:20:23,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-07-23 15:20:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2018-07-23 15:20:23,291 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 219 [2018-07-23 15:20:23,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:23,291 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2018-07-23 15:20:23,291 INFO L472 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-23 15:20:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2018-07-23 15:20:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-07-23 15:20:23,291 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:23,292 INFO L353 BasicCegarLoop]: trace histogram [73, 72, 72, 1, 1, 1, 1] [2018-07-23 15:20:23,292 INFO L414 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:23,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1983039739, now seen corresponding path program 143 times [2018-07-23 15:20:23,292 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7884 backedges. 5256 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:23,733 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:23,733 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147] total 147 [2018-07-23 15:20:23,733 INFO L450 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-07-23 15:20:23,734 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-07-23 15:20:23,735 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5549, Invalid=16207, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:20:23,735 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 148 states. [2018-07-23 15:20:24,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:24,623 INFO L93 Difference]: Finished difference Result 372 states and 374 transitions. [2018-07-23 15:20:24,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-07-23 15:20:24,623 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 221 [2018-07-23 15:20:24,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:24,624 INFO L225 Difference]: With dead ends: 372 [2018-07-23 15:20:24,624 INFO L226 Difference]: Without dead ends: 223 [2018-07-23 15:20:24,628 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11097, Invalid=37523, Unknown=0, NotChecked=0, Total=48620 [2018-07-23 15:20:24,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-07-23 15:20:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-07-23 15:20:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-07-23 15:20:24,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2018-07-23 15:20:24,650 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 221 [2018-07-23 15:20:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:24,650 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2018-07-23 15:20:24,650 INFO L472 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-07-23 15:20:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2018-07-23 15:20:24,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-07-23 15:20:24,651 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:24,651 INFO L353 BasicCegarLoop]: trace histogram [73, 73, 72, 1, 1, 1, 1] [2018-07-23 15:20:24,651 INFO L414 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:24,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1954034722, now seen corresponding path program 144 times [2018-07-23 15:20:24,652 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 2701 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:24,925 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:24,925 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-07-23 15:20:24,926 INFO L450 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-23 15:20:24,926 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-23 15:20:24,926 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:20:24,926 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand 77 states. [2018-07-23 15:20:25,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:25,177 INFO L93 Difference]: Finished difference Result 231 states and 232 transitions. [2018-07-23 15:20:25,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-07-23 15:20:25,177 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 222 [2018-07-23 15:20:25,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:25,178 INFO L225 Difference]: With dead ends: 231 [2018-07-23 15:20:25,178 INFO L226 Difference]: Without dead ends: 229 [2018-07-23 15:20:25,180 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5402 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2018-07-23 15:20:25,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-07-23 15:20:25,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2018-07-23 15:20:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-07-23 15:20:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2018-07-23 15:20:25,203 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 222 [2018-07-23 15:20:25,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:25,203 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2018-07-23 15:20:25,203 INFO L472 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-23 15:20:25,203 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2018-07-23 15:20:25,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-07-23 15:20:25,204 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:25,204 INFO L353 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1, 1, 1] [2018-07-23 15:20:25,204 INFO L414 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:25,204 INFO L82 PathProgramCache]: Analyzing trace with hash 926725514, now seen corresponding path program 145 times [2018-07-23 15:20:25,204 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8103 backedges. 5402 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:25,715 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:25,715 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149] total 149 [2018-07-23 15:20:25,715 INFO L450 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-07-23 15:20:25,716 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-07-23 15:20:25,717 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5699, Invalid=16651, Unknown=0, NotChecked=0, Total=22350 [2018-07-23 15:20:25,717 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand 150 states. [2018-07-23 15:20:26,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:26,774 INFO L93 Difference]: Finished difference Result 377 states and 379 transitions. [2018-07-23 15:20:26,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-07-23 15:20:26,775 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 224 [2018-07-23 15:20:26,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:26,775 INFO L225 Difference]: With dead ends: 377 [2018-07-23 15:20:26,775 INFO L226 Difference]: Without dead ends: 226 [2018-07-23 15:20:26,780 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8030 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11397, Invalid=38555, Unknown=0, NotChecked=0, Total=49952 [2018-07-23 15:20:26,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-07-23 15:20:26,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-07-23 15:20:26,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-07-23 15:20:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2018-07-23 15:20:26,816 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 224 [2018-07-23 15:20:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:26,817 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2018-07-23 15:20:26,817 INFO L472 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-07-23 15:20:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2018-07-23 15:20:26,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-07-23 15:20:26,818 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:26,818 INFO L353 BasicCegarLoop]: trace histogram [74, 74, 73, 1, 1, 1, 1] [2018-07-23 15:20:26,818 INFO L414 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:26,818 INFO L82 PathProgramCache]: Analyzing trace with hash 126690563, now seen corresponding path program 146 times [2018-07-23 15:20:26,819 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 2775 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:27,170 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:27,171 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-07-23 15:20:27,171 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-23 15:20:27,171 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-23 15:20:27,171 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:20:27,172 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand 78 states. [2018-07-23 15:20:27,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:27,409 INFO L93 Difference]: Finished difference Result 234 states and 235 transitions. [2018-07-23 15:20:27,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-07-23 15:20:27,410 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 225 [2018-07-23 15:20:27,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:27,410 INFO L225 Difference]: With dead ends: 234 [2018-07-23 15:20:27,410 INFO L226 Difference]: Without dead ends: 232 [2018-07-23 15:20:27,412 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5550 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2018-07-23 15:20:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-07-23 15:20:27,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2018-07-23 15:20:27,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-07-23 15:20:27,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2018-07-23 15:20:27,433 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 225 [2018-07-23 15:20:27,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:27,434 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2018-07-23 15:20:27,434 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-23 15:20:27,434 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2018-07-23 15:20:27,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-07-23 15:20:27,434 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:27,434 INFO L353 BasicCegarLoop]: trace histogram [75, 74, 74, 1, 1, 1, 1] [2018-07-23 15:20:27,434 INFO L414 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:27,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1490612779, now seen corresponding path program 147 times [2018-07-23 15:20:27,435 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8325 backedges. 5550 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:27,921 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:27,921 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151] total 151 [2018-07-23 15:20:27,921 INFO L450 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-07-23 15:20:27,922 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-07-23 15:20:27,923 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5851, Invalid=17101, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:20:27,923 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand 152 states. [2018-07-23 15:20:29,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:29,055 INFO L93 Difference]: Finished difference Result 382 states and 384 transitions. [2018-07-23 15:20:29,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-07-23 15:20:29,056 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 227 [2018-07-23 15:20:29,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:29,056 INFO L225 Difference]: With dead ends: 382 [2018-07-23 15:20:29,056 INFO L226 Difference]: Without dead ends: 229 [2018-07-23 15:20:29,059 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11701, Invalid=39601, Unknown=0, NotChecked=0, Total=51302 [2018-07-23 15:20:29,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-07-23 15:20:29,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-07-23 15:20:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-07-23 15:20:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2018-07-23 15:20:29,082 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 227 [2018-07-23 15:20:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:29,082 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2018-07-23 15:20:29,082 INFO L472 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-07-23 15:20:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2018-07-23 15:20:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-07-23 15:20:29,082 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:29,083 INFO L353 BasicCegarLoop]: trace histogram [75, 75, 74, 1, 1, 1, 1] [2018-07-23 15:20:29,083 INFO L414 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash 422913042, now seen corresponding path program 148 times [2018-07-23 15:20:29,083 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 2850 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:29,376 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:29,376 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-07-23 15:20:29,376 INFO L450 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-23 15:20:29,376 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-23 15:20:29,376 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:20:29,377 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand 79 states. [2018-07-23 15:20:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:29,651 INFO L93 Difference]: Finished difference Result 237 states and 238 transitions. [2018-07-23 15:20:29,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-07-23 15:20:29,651 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 228 [2018-07-23 15:20:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:29,652 INFO L225 Difference]: With dead ends: 237 [2018-07-23 15:20:29,652 INFO L226 Difference]: Without dead ends: 235 [2018-07-23 15:20:29,654 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5700 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:20:29,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-07-23 15:20:29,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 231. [2018-07-23 15:20:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-07-23 15:20:29,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2018-07-23 15:20:29,677 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 228 [2018-07-23 15:20:29,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:29,677 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2018-07-23 15:20:29,677 INFO L472 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-23 15:20:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2018-07-23 15:20:29,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-07-23 15:20:29,678 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:29,678 INFO L353 BasicCegarLoop]: trace histogram [76, 75, 75, 1, 1, 1, 1] [2018-07-23 15:20:29,678 INFO L414 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:29,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1602393734, now seen corresponding path program 149 times [2018-07-23 15:20:29,678 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 5700 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:30,174 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:30,175 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153] total 153 [2018-07-23 15:20:30,175 INFO L450 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-07-23 15:20:30,176 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-07-23 15:20:30,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6005, Invalid=17557, Unknown=0, NotChecked=0, Total=23562 [2018-07-23 15:20:30,177 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 154 states. [2018-07-23 15:20:31,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:31,334 INFO L93 Difference]: Finished difference Result 387 states and 389 transitions. [2018-07-23 15:20:31,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-07-23 15:20:31,334 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 230 [2018-07-23 15:20:31,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:31,335 INFO L225 Difference]: With dead ends: 387 [2018-07-23 15:20:31,335 INFO L226 Difference]: Without dead ends: 232 [2018-07-23 15:20:31,339 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8475 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=12009, Invalid=40661, Unknown=0, NotChecked=0, Total=52670 [2018-07-23 15:20:31,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-07-23 15:20:31,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2018-07-23 15:20:31,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-07-23 15:20:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2018-07-23 15:20:31,365 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 230 [2018-07-23 15:20:31,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:31,365 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2018-07-23 15:20:31,365 INFO L472 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-07-23 15:20:31,365 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2018-07-23 15:20:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-07-23 15:20:31,366 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:31,366 INFO L353 BasicCegarLoop]: trace histogram [76, 76, 75, 1, 1, 1, 1] [2018-07-23 15:20:31,366 INFO L414 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:31,366 INFO L82 PathProgramCache]: Analyzing trace with hash -917464525, now seen corresponding path program 150 times [2018-07-23 15:20:31,366 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 2926 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:31,663 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:31,664 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-07-23 15:20:31,664 INFO L450 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-23 15:20:31,664 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-23 15:20:31,664 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:20:31,665 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand 80 states. [2018-07-23 15:20:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:31,935 INFO L93 Difference]: Finished difference Result 240 states and 241 transitions. [2018-07-23 15:20:31,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-07-23 15:20:31,935 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 231 [2018-07-23 15:20:31,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:31,936 INFO L225 Difference]: With dead ends: 240 [2018-07-23 15:20:31,936 INFO L226 Difference]: Without dead ends: 238 [2018-07-23 15:20:31,938 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5852 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2018-07-23 15:20:31,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-07-23 15:20:31,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2018-07-23 15:20:31,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-07-23 15:20:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2018-07-23 15:20:31,961 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 231 [2018-07-23 15:20:31,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:31,962 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2018-07-23 15:20:31,962 INFO L472 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-23 15:20:31,962 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2018-07-23 15:20:31,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-07-23 15:20:31,962 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:31,962 INFO L353 BasicCegarLoop]: trace histogram [77, 76, 76, 1, 1, 1, 1] [2018-07-23 15:20:31,962 INFO L414 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:31,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1215046821, now seen corresponding path program 151 times [2018-07-23 15:20:31,963 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 5852 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:32,460 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:32,460 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155] total 155 [2018-07-23 15:20:32,461 INFO L450 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-07-23 15:20:32,462 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-07-23 15:20:32,463 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6161, Invalid=18019, Unknown=0, NotChecked=0, Total=24180 [2018-07-23 15:20:32,464 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 156 states. [2018-07-23 15:20:33,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:33,709 INFO L93 Difference]: Finished difference Result 392 states and 394 transitions. [2018-07-23 15:20:33,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-07-23 15:20:33,709 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 233 [2018-07-23 15:20:33,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:33,710 INFO L225 Difference]: With dead ends: 392 [2018-07-23 15:20:33,710 INFO L226 Difference]: Without dead ends: 235 [2018-07-23 15:20:33,713 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8702 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=12321, Invalid=41735, Unknown=0, NotChecked=0, Total=54056 [2018-07-23 15:20:33,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-07-23 15:20:33,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-07-23 15:20:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-07-23 15:20:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2018-07-23 15:20:33,792 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 233 [2018-07-23 15:20:33,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:33,793 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2018-07-23 15:20:33,793 INFO L472 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-07-23 15:20:33,793 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2018-07-23 15:20:33,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-07-23 15:20:33,793 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:33,793 INFO L353 BasicCegarLoop]: trace histogram [77, 77, 76, 1, 1, 1, 1] [2018-07-23 15:20:33,793 INFO L414 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:33,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1878604798, now seen corresponding path program 152 times [2018-07-23 15:20:33,794 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 3003 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:34,094 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:34,094 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-07-23 15:20:34,094 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-23 15:20:34,094 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-23 15:20:34,095 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:20:34,095 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 81 states. [2018-07-23 15:20:34,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:34,349 INFO L93 Difference]: Finished difference Result 243 states and 244 transitions. [2018-07-23 15:20:34,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-07-23 15:20:34,349 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 234 [2018-07-23 15:20:34,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:34,350 INFO L225 Difference]: With dead ends: 243 [2018-07-23 15:20:34,350 INFO L226 Difference]: Without dead ends: 241 [2018-07-23 15:20:34,352 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6006 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2018-07-23 15:20:34,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-07-23 15:20:34,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2018-07-23 15:20:34,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-07-23 15:20:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2018-07-23 15:20:34,390 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 234 [2018-07-23 15:20:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:34,390 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2018-07-23 15:20:34,391 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-23 15:20:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2018-07-23 15:20:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-07-23 15:20:34,392 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:34,392 INFO L353 BasicCegarLoop]: trace histogram [78, 77, 77, 1, 1, 1, 1] [2018-07-23 15:20:34,392 INFO L414 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:34,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1452880534, now seen corresponding path program 153 times [2018-07-23 15:20:34,392 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 6006 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:34,999 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:34,999 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157] total 157 [2018-07-23 15:20:35,000 INFO L450 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-07-23 15:20:35,001 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-07-23 15:20:35,003 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6319, Invalid=18487, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:20:35,003 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand 158 states. [2018-07-23 15:20:36,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:36,205 INFO L93 Difference]: Finished difference Result 397 states and 399 transitions. [2018-07-23 15:20:36,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-07-23 15:20:36,205 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 236 [2018-07-23 15:20:36,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:36,206 INFO L225 Difference]: With dead ends: 397 [2018-07-23 15:20:36,206 INFO L226 Difference]: Without dead ends: 238 [2018-07-23 15:20:36,209 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8932 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=12637, Invalid=42823, Unknown=0, NotChecked=0, Total=55460 [2018-07-23 15:20:36,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-07-23 15:20:36,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2018-07-23 15:20:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-07-23 15:20:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2018-07-23 15:20:36,232 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 236 [2018-07-23 15:20:36,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:36,233 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2018-07-23 15:20:36,233 INFO L472 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-07-23 15:20:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2018-07-23 15:20:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-07-23 15:20:36,233 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:36,233 INFO L353 BasicCegarLoop]: trace histogram [78, 78, 77, 1, 1, 1, 1] [2018-07-23 15:20:36,234 INFO L414 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:36,234 INFO L82 PathProgramCache]: Analyzing trace with hash 225890147, now seen corresponding path program 154 times [2018-07-23 15:20:36,234 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 3081 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:36,543 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:36,543 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-07-23 15:20:36,544 INFO L450 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-23 15:20:36,544 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-23 15:20:36,544 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:20:36,545 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand 82 states. [2018-07-23 15:20:36,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:36,821 INFO L93 Difference]: Finished difference Result 246 states and 247 transitions. [2018-07-23 15:20:36,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-07-23 15:20:36,821 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 237 [2018-07-23 15:20:36,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:36,821 INFO L225 Difference]: With dead ends: 246 [2018-07-23 15:20:36,822 INFO L226 Difference]: Without dead ends: 244 [2018-07-23 15:20:36,823 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2018-07-23 15:20:36,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-07-23 15:20:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2018-07-23 15:20:36,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-07-23 15:20:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2018-07-23 15:20:36,848 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 237 [2018-07-23 15:20:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:36,848 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2018-07-23 15:20:36,848 INFO L472 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-23 15:20:36,848 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2018-07-23 15:20:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-07-23 15:20:36,849 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:36,849 INFO L353 BasicCegarLoop]: trace histogram [79, 78, 78, 1, 1, 1, 1] [2018-07-23 15:20:36,849 INFO L414 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:36,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1962834805, now seen corresponding path program 155 times [2018-07-23 15:20:36,849 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 6162 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:37,416 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:37,416 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159] total 159 [2018-07-23 15:20:37,416 INFO L450 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-07-23 15:20:37,417 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-07-23 15:20:37,417 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6479, Invalid=18961, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:20:37,417 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand 160 states. [2018-07-23 15:20:38,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:38,607 INFO L93 Difference]: Finished difference Result 402 states and 404 transitions. [2018-07-23 15:20:38,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-07-23 15:20:38,608 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 239 [2018-07-23 15:20:38,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:38,608 INFO L225 Difference]: With dead ends: 402 [2018-07-23 15:20:38,608 INFO L226 Difference]: Without dead ends: 241 [2018-07-23 15:20:38,611 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=12957, Invalid=43925, Unknown=0, NotChecked=0, Total=56882 [2018-07-23 15:20:38,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-07-23 15:20:38,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-07-23 15:20:38,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-07-23 15:20:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2018-07-23 15:20:38,635 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 239 [2018-07-23 15:20:38,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:38,635 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2018-07-23 15:20:38,635 INFO L472 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-07-23 15:20:38,635 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2018-07-23 15:20:38,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-07-23 15:20:38,635 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:38,636 INFO L353 BasicCegarLoop]: trace histogram [79, 79, 78, 1, 1, 1, 1] [2018-07-23 15:20:38,636 INFO L414 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:38,636 INFO L82 PathProgramCache]: Analyzing trace with hash -304671758, now seen corresponding path program 156 times [2018-07-23 15:20:38,636 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9322 backedges. 3160 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:38,953 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:38,953 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-07-23 15:20:38,953 INFO L450 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-07-23 15:20:38,954 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-07-23 15:20:38,954 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:20:38,954 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand 83 states. [2018-07-23 15:20:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:39,222 INFO L93 Difference]: Finished difference Result 249 states and 250 transitions. [2018-07-23 15:20:39,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-07-23 15:20:39,222 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 240 [2018-07-23 15:20:39,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:39,223 INFO L225 Difference]: With dead ends: 249 [2018-07-23 15:20:39,223 INFO L226 Difference]: Without dead ends: 247 [2018-07-23 15:20:39,226 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6320 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:20:39,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-07-23 15:20:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 243. [2018-07-23 15:20:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-07-23 15:20:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2018-07-23 15:20:39,252 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 240 [2018-07-23 15:20:39,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:39,252 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2018-07-23 15:20:39,252 INFO L472 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-07-23 15:20:39,252 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2018-07-23 15:20:39,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-07-23 15:20:39,253 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:39,253 INFO L353 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1, 1, 1] [2018-07-23 15:20:39,253 INFO L414 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:39,253 INFO L82 PathProgramCache]: Analyzing trace with hash -731717286, now seen corresponding path program 157 times [2018-07-23 15:20:39,253 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 6320 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:39,802 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:39,802 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161] total 161 [2018-07-23 15:20:39,803 INFO L450 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-07-23 15:20:39,803 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-07-23 15:20:39,804 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6641, Invalid=19441, Unknown=0, NotChecked=0, Total=26082 [2018-07-23 15:20:39,805 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 162 states. [2018-07-23 15:20:41,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:41,106 INFO L93 Difference]: Finished difference Result 407 states and 409 transitions. [2018-07-23 15:20:41,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-07-23 15:20:41,106 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 242 [2018-07-23 15:20:41,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:41,107 INFO L225 Difference]: With dead ends: 407 [2018-07-23 15:20:41,107 INFO L226 Difference]: Without dead ends: 244 [2018-07-23 15:20:41,110 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9401 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13281, Invalid=45041, Unknown=0, NotChecked=0, Total=58322 [2018-07-23 15:20:41,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-07-23 15:20:41,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2018-07-23 15:20:41,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-07-23 15:20:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2018-07-23 15:20:41,135 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 242 [2018-07-23 15:20:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:41,136 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2018-07-23 15:20:41,136 INFO L472 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-07-23 15:20:41,136 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2018-07-23 15:20:41,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-07-23 15:20:41,136 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:41,136 INFO L353 BasicCegarLoop]: trace histogram [80, 80, 79, 1, 1, 1, 1] [2018-07-23 15:20:41,137 INFO L414 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:41,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1184744595, now seen corresponding path program 158 times [2018-07-23 15:20:41,137 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 3240 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:41,471 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:41,471 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-07-23 15:20:41,471 INFO L450 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-23 15:20:41,471 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-23 15:20:41,471 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:20:41,472 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand 84 states. [2018-07-23 15:20:41,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:41,775 INFO L93 Difference]: Finished difference Result 252 states and 253 transitions. [2018-07-23 15:20:41,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-07-23 15:20:41,775 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 243 [2018-07-23 15:20:41,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:41,776 INFO L225 Difference]: With dead ends: 252 [2018-07-23 15:20:41,776 INFO L226 Difference]: Without dead ends: 250 [2018-07-23 15:20:41,777 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6480 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2018-07-23 15:20:41,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-07-23 15:20:41,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2018-07-23 15:20:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-07-23 15:20:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2018-07-23 15:20:41,802 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 243 [2018-07-23 15:20:41,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:41,802 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2018-07-23 15:20:41,802 INFO L472 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-23 15:20:41,802 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2018-07-23 15:20:41,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-07-23 15:20:41,803 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:41,803 INFO L353 BasicCegarLoop]: trace histogram [81, 80, 80, 1, 1, 1, 1] [2018-07-23 15:20:41,803 INFO L414 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:41,803 INFO L82 PathProgramCache]: Analyzing trace with hash 373288379, now seen corresponding path program 159 times [2018-07-23 15:20:41,803 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 6480 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:42,330 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:42,330 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163] total 163 [2018-07-23 15:20:42,330 INFO L450 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-07-23 15:20:42,331 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-07-23 15:20:42,332 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6805, Invalid=19927, Unknown=0, NotChecked=0, Total=26732 [2018-07-23 15:20:42,332 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand 164 states. [2018-07-23 15:20:43,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:43,665 INFO L93 Difference]: Finished difference Result 412 states and 414 transitions. [2018-07-23 15:20:43,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-07-23 15:20:43,666 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 245 [2018-07-23 15:20:43,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:43,667 INFO L225 Difference]: With dead ends: 412 [2018-07-23 15:20:43,667 INFO L226 Difference]: Without dead ends: 247 [2018-07-23 15:20:43,673 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9640 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13609, Invalid=46171, Unknown=0, NotChecked=0, Total=59780 [2018-07-23 15:20:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-07-23 15:20:43,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-07-23 15:20:43,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-07-23 15:20:43,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2018-07-23 15:20:43,699 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 245 [2018-07-23 15:20:43,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:43,700 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2018-07-23 15:20:43,700 INFO L472 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-07-23 15:20:43,700 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2018-07-23 15:20:43,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-07-23 15:20:43,700 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:43,701 INFO L353 BasicCegarLoop]: trace histogram [81, 81, 80, 1, 1, 1, 1] [2018-07-23 15:20:43,701 INFO L414 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:43,701 INFO L82 PathProgramCache]: Analyzing trace with hash 688919522, now seen corresponding path program 160 times [2018-07-23 15:20:43,701 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 3321 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:44,044 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:44,044 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-07-23 15:20:44,045 INFO L450 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-07-23 15:20:44,045 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-07-23 15:20:44,045 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:20:44,045 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand 85 states. [2018-07-23 15:20:44,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:44,336 INFO L93 Difference]: Finished difference Result 255 states and 256 transitions. [2018-07-23 15:20:44,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-07-23 15:20:44,336 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 246 [2018-07-23 15:20:44,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:44,336 INFO L225 Difference]: With dead ends: 255 [2018-07-23 15:20:44,337 INFO L226 Difference]: Without dead ends: 253 [2018-07-23 15:20:44,338 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6642 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:20:44,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-07-23 15:20:44,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2018-07-23 15:20:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-07-23 15:20:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2018-07-23 15:20:44,364 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 246 [2018-07-23 15:20:44,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:44,364 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2018-07-23 15:20:44,364 INFO L472 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-07-23 15:20:44,364 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2018-07-23 15:20:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-07-23 15:20:44,365 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:44,365 INFO L353 BasicCegarLoop]: trace histogram [82, 81, 81, 1, 1, 1, 1] [2018-07-23 15:20:44,365 INFO L414 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:44,365 INFO L82 PathProgramCache]: Analyzing trace with hash 626763082, now seen corresponding path program 161 times [2018-07-23 15:20:44,365 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9963 backedges. 6642 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:44,931 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:44,931 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165] total 165 [2018-07-23 15:20:44,931 INFO L450 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-07-23 15:20:44,932 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-07-23 15:20:44,933 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6971, Invalid=20419, Unknown=0, NotChecked=0, Total=27390 [2018-07-23 15:20:44,933 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand 166 states. [2018-07-23 15:20:46,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:46,254 INFO L93 Difference]: Finished difference Result 417 states and 419 transitions. [2018-07-23 15:20:46,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-07-23 15:20:46,254 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 248 [2018-07-23 15:20:46,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:46,254 INFO L225 Difference]: With dead ends: 417 [2018-07-23 15:20:46,254 INFO L226 Difference]: Without dead ends: 250 [2018-07-23 15:20:46,258 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9882 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13941, Invalid=47315, Unknown=0, NotChecked=0, Total=61256 [2018-07-23 15:20:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-07-23 15:20:46,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2018-07-23 15:20:46,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-07-23 15:20:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2018-07-23 15:20:46,295 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 248 [2018-07-23 15:20:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:46,295 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2018-07-23 15:20:46,295 INFO L472 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-07-23 15:20:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2018-07-23 15:20:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-07-23 15:20:46,296 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:46,296 INFO L353 BasicCegarLoop]: trace histogram [82, 82, 81, 1, 1, 1, 1] [2018-07-23 15:20:46,296 INFO L414 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:46,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1910733251, now seen corresponding path program 162 times [2018-07-23 15:20:46,296 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10045 backedges. 3403 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:46,637 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:46,637 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-07-23 15:20:46,638 INFO L450 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-23 15:20:46,638 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-23 15:20:46,638 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:20:46,638 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand 86 states. [2018-07-23 15:20:46,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:46,918 INFO L93 Difference]: Finished difference Result 258 states and 259 transitions. [2018-07-23 15:20:46,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-07-23 15:20:46,918 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 249 [2018-07-23 15:20:46,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:46,919 INFO L225 Difference]: With dead ends: 258 [2018-07-23 15:20:46,919 INFO L226 Difference]: Without dead ends: 256 [2018-07-23 15:20:46,921 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6806 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:20:46,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-07-23 15:20:46,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2018-07-23 15:20:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-07-23 15:20:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2018-07-23 15:20:46,947 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 249 [2018-07-23 15:20:46,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:46,947 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2018-07-23 15:20:46,947 INFO L472 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-23 15:20:46,947 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2018-07-23 15:20:46,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-07-23 15:20:46,948 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:46,948 INFO L353 BasicCegarLoop]: trace histogram [83, 82, 82, 1, 1, 1, 1] [2018-07-23 15:20:46,948 INFO L414 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:46,948 INFO L82 PathProgramCache]: Analyzing trace with hash -2031282453, now seen corresponding path program 163 times [2018-07-23 15:20:46,948 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10209 backedges. 6806 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:47,495 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:47,495 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167] total 167 [2018-07-23 15:20:47,495 INFO L450 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-07-23 15:20:47,496 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-07-23 15:20:47,497 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7139, Invalid=20917, Unknown=0, NotChecked=0, Total=28056 [2018-07-23 15:20:47,497 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 168 states. [2018-07-23 15:20:48,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:48,971 INFO L93 Difference]: Finished difference Result 422 states and 424 transitions. [2018-07-23 15:20:48,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-07-23 15:20:48,971 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 251 [2018-07-23 15:20:48,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:48,972 INFO L225 Difference]: With dead ends: 422 [2018-07-23 15:20:48,972 INFO L226 Difference]: Without dead ends: 253 [2018-07-23 15:20:48,977 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=14277, Invalid=48473, Unknown=0, NotChecked=0, Total=62750 [2018-07-23 15:20:48,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-07-23 15:20:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-07-23 15:20:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-07-23 15:20:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2018-07-23 15:20:49,022 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 251 [2018-07-23 15:20:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:49,022 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2018-07-23 15:20:49,022 INFO L472 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-07-23 15:20:49,023 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2018-07-23 15:20:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-07-23 15:20:49,024 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:49,024 INFO L353 BasicCegarLoop]: trace histogram [83, 83, 82, 1, 1, 1, 1] [2018-07-23 15:20:49,024 INFO L414 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:49,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2040251346, now seen corresponding path program 164 times [2018-07-23 15:20:49,024 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10292 backedges. 3486 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:49,393 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:49,393 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-07-23 15:20:49,394 INFO L450 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-23 15:20:49,394 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-23 15:20:49,394 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:20:49,394 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand 87 states. [2018-07-23 15:20:49,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:49,743 INFO L93 Difference]: Finished difference Result 261 states and 262 transitions. [2018-07-23 15:20:49,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2018-07-23 15:20:49,743 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 252 [2018-07-23 15:20:49,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:49,744 INFO L225 Difference]: With dead ends: 261 [2018-07-23 15:20:49,744 INFO L226 Difference]: Without dead ends: 259 [2018-07-23 15:20:49,745 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6972 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2018-07-23 15:20:49,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-07-23 15:20:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 255. [2018-07-23 15:20:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-07-23 15:20:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2018-07-23 15:20:49,772 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 252 [2018-07-23 15:20:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:49,772 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2018-07-23 15:20:49,772 INFO L472 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-23 15:20:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2018-07-23 15:20:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-07-23 15:20:49,773 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:49,773 INFO L353 BasicCegarLoop]: trace histogram [84, 83, 83, 1, 1, 1, 1] [2018-07-23 15:20:49,773 INFO L414 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:49,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2118444742, now seen corresponding path program 165 times [2018-07-23 15:20:49,773 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 6972 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:50,336 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:50,336 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [169] total 169 [2018-07-23 15:20:50,336 INFO L450 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-07-23 15:20:50,337 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-07-23 15:20:50,338 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7309, Invalid=21421, Unknown=0, NotChecked=0, Total=28730 [2018-07-23 15:20:50,339 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand 170 states. [2018-07-23 15:20:51,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:51,790 INFO L93 Difference]: Finished difference Result 427 states and 429 transitions. [2018-07-23 15:20:51,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2018-07-23 15:20:51,790 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 254 [2018-07-23 15:20:51,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:51,791 INFO L225 Difference]: With dead ends: 427 [2018-07-23 15:20:51,791 INFO L226 Difference]: Without dead ends: 256 [2018-07-23 15:20:51,796 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=14617, Invalid=49645, Unknown=0, NotChecked=0, Total=64262 [2018-07-23 15:20:51,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-07-23 15:20:51,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-07-23 15:20:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-07-23 15:20:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2018-07-23 15:20:51,840 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 254 [2018-07-23 15:20:51,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:51,840 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2018-07-23 15:20:51,840 INFO L472 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-07-23 15:20:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2018-07-23 15:20:51,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-07-23 15:20:51,842 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:51,842 INFO L353 BasicCegarLoop]: trace histogram [84, 84, 83, 1, 1, 1, 1] [2018-07-23 15:20:51,842 INFO L414 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:51,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1226445069, now seen corresponding path program 166 times [2018-07-23 15:20:51,842 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10542 backedges. 3570 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:52,269 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:52,269 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-07-23 15:20:52,270 INFO L450 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-23 15:20:52,270 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-23 15:20:52,270 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:20:52,271 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand 88 states. [2018-07-23 15:20:52,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:52,608 INFO L93 Difference]: Finished difference Result 264 states and 265 transitions. [2018-07-23 15:20:52,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2018-07-23 15:20:52,608 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 255 [2018-07-23 15:20:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:52,609 INFO L225 Difference]: With dead ends: 264 [2018-07-23 15:20:52,609 INFO L226 Difference]: Without dead ends: 262 [2018-07-23 15:20:52,611 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2018-07-23 15:20:52,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2018-07-23 15:20:52,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2018-07-23 15:20:52,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-07-23 15:20:52,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2018-07-23 15:20:52,657 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 255 [2018-07-23 15:20:52,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:52,657 INFO L471 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2018-07-23 15:20:52,657 INFO L472 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-23 15:20:52,657 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2018-07-23 15:20:52,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-07-23 15:20:52,658 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:52,659 INFO L353 BasicCegarLoop]: trace histogram [85, 84, 84, 1, 1, 1, 1] [2018-07-23 15:20:52,659 INFO L414 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:52,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1792606181, now seen corresponding path program 167 times [2018-07-23 15:20:52,659 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10710 backedges. 7140 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:53,383 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:53,383 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [171] total 171 [2018-07-23 15:20:53,384 INFO L450 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-07-23 15:20:53,384 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-07-23 15:20:53,385 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7481, Invalid=21931, Unknown=0, NotChecked=0, Total=29412 [2018-07-23 15:20:53,385 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 172 states. [2018-07-23 15:20:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:54,335 INFO L93 Difference]: Finished difference Result 432 states and 434 transitions. [2018-07-23 15:20:54,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2018-07-23 15:20:54,335 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 257 [2018-07-23 15:20:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:54,336 INFO L225 Difference]: With dead ends: 432 [2018-07-23 15:20:54,336 INFO L226 Difference]: Without dead ends: 259 [2018-07-23 15:20:54,339 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10626 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=14961, Invalid=50831, Unknown=0, NotChecked=0, Total=65792 [2018-07-23 15:20:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-07-23 15:20:54,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-07-23 15:20:54,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-07-23 15:20:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2018-07-23 15:20:54,367 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 257 [2018-07-23 15:20:54,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:54,367 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2018-07-23 15:20:54,367 INFO L472 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-07-23 15:20:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2018-07-23 15:20:54,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-07-23 15:20:54,368 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:54,368 INFO L353 BasicCegarLoop]: trace histogram [85, 85, 84, 1, 1, 1, 1] [2018-07-23 15:20:54,368 INFO L414 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:54,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1193008190, now seen corresponding path program 168 times [2018-07-23 15:20:54,368 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:54,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10795 backedges. 3655 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:54,744 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:54,744 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-07-23 15:20:54,744 INFO L450 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-07-23 15:20:54,744 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-07-23 15:20:54,745 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:20:54,745 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 89 states. [2018-07-23 15:20:55,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:55,051 INFO L93 Difference]: Finished difference Result 267 states and 268 transitions. [2018-07-23 15:20:55,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2018-07-23 15:20:55,051 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 258 [2018-07-23 15:20:55,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:55,052 INFO L225 Difference]: With dead ends: 267 [2018-07-23 15:20:55,052 INFO L226 Difference]: Without dead ends: 265 [2018-07-23 15:20:55,053 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7310 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:20:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-07-23 15:20:55,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 261. [2018-07-23 15:20:55,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-07-23 15:20:55,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2018-07-23 15:20:55,081 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 258 [2018-07-23 15:20:55,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:55,082 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2018-07-23 15:20:55,082 INFO L472 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-07-23 15:20:55,082 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2018-07-23 15:20:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-07-23 15:20:55,082 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:55,082 INFO L353 BasicCegarLoop]: trace histogram [86, 85, 85, 1, 1, 1, 1] [2018-07-23 15:20:55,083 INFO L414 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:55,083 INFO L82 PathProgramCache]: Analyzing trace with hash 275463466, now seen corresponding path program 169 times [2018-07-23 15:20:55,083 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10965 backedges. 7310 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:55,682 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:55,682 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [173] total 173 [2018-07-23 15:20:55,683 INFO L450 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-07-23 15:20:55,684 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-07-23 15:20:55,686 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7655, Invalid=22447, Unknown=0, NotChecked=0, Total=30102 [2018-07-23 15:20:55,687 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand 174 states. [2018-07-23 15:20:56,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:56,432 INFO L93 Difference]: Finished difference Result 437 states and 439 transitions. [2018-07-23 15:20:56,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2018-07-23 15:20:56,432 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 260 [2018-07-23 15:20:56,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:56,432 INFO L225 Difference]: With dead ends: 437 [2018-07-23 15:20:56,433 INFO L226 Difference]: Without dead ends: 262 [2018-07-23 15:20:56,437 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10880 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15309, Invalid=52031, Unknown=0, NotChecked=0, Total=67340 [2018-07-23 15:20:56,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2018-07-23 15:20:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2018-07-23 15:20:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-07-23 15:20:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2018-07-23 15:20:56,467 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 260 [2018-07-23 15:20:56,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:56,467 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2018-07-23 15:20:56,468 INFO L472 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-07-23 15:20:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2018-07-23 15:20:56,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-07-23 15:20:56,468 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:56,468 INFO L353 BasicCegarLoop]: trace histogram [86, 86, 85, 1, 1, 1, 1] [2018-07-23 15:20:56,469 INFO L414 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:56,469 INFO L82 PathProgramCache]: Analyzing trace with hash 130229283, now seen corresponding path program 170 times [2018-07-23 15:20:56,469 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11051 backedges. 3741 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:56,920 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:56,920 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-07-23 15:20:56,921 INFO L450 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-23 15:20:56,921 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-23 15:20:56,921 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:20:56,921 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand 90 states. [2018-07-23 15:20:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:57,219 INFO L93 Difference]: Finished difference Result 270 states and 271 transitions. [2018-07-23 15:20:57,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2018-07-23 15:20:57,219 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 261 [2018-07-23 15:20:57,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:57,220 INFO L225 Difference]: With dead ends: 270 [2018-07-23 15:20:57,220 INFO L226 Difference]: Without dead ends: 268 [2018-07-23 15:20:57,221 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7482 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2018-07-23 15:20:57,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-07-23 15:20:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2018-07-23 15:20:57,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-07-23 15:20:57,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 265 transitions. [2018-07-23 15:20:57,250 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 265 transitions. Word has length 261 [2018-07-23 15:20:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:57,250 INFO L471 AbstractCegarLoop]: Abstraction has 264 states and 265 transitions. [2018-07-23 15:20:57,250 INFO L472 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-23 15:20:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 265 transitions. [2018-07-23 15:20:57,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-07-23 15:20:57,251 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:57,251 INFO L353 BasicCegarLoop]: trace histogram [87, 86, 86, 1, 1, 1, 1] [2018-07-23 15:20:57,251 INFO L414 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:57,251 INFO L82 PathProgramCache]: Analyzing trace with hash 596355403, now seen corresponding path program 171 times [2018-07-23 15:20:57,251 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11223 backedges. 7482 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:57,863 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:57,863 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [175] total 175 [2018-07-23 15:20:57,864 INFO L450 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-07-23 15:20:57,864 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-07-23 15:20:57,866 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7831, Invalid=22969, Unknown=0, NotChecked=0, Total=30800 [2018-07-23 15:20:57,866 INFO L87 Difference]: Start difference. First operand 264 states and 265 transitions. Second operand 176 states. [2018-07-23 15:20:58,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:58,616 INFO L93 Difference]: Finished difference Result 442 states and 444 transitions. [2018-07-23 15:20:58,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2018-07-23 15:20:58,616 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 263 [2018-07-23 15:20:58,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:58,617 INFO L225 Difference]: With dead ends: 442 [2018-07-23 15:20:58,617 INFO L226 Difference]: Without dead ends: 265 [2018-07-23 15:20:58,621 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11137 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15661, Invalid=53245, Unknown=0, NotChecked=0, Total=68906 [2018-07-23 15:20:58,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-07-23 15:20:58,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2018-07-23 15:20:58,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-07-23 15:20:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2018-07-23 15:20:58,650 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 263 [2018-07-23 15:20:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:58,650 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2018-07-23 15:20:58,650 INFO L472 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-07-23 15:20:58,650 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2018-07-23 15:20:58,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-07-23 15:20:58,651 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:58,651 INFO L353 BasicCegarLoop]: trace histogram [87, 87, 86, 1, 1, 1, 1] [2018-07-23 15:20:58,651 INFO L414 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:58,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1043123278, now seen corresponding path program 172 times [2018-07-23 15:20:58,651 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11310 backedges. 3828 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:59,045 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:59,046 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2018-07-23 15:20:59,046 INFO L450 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-07-23 15:20:59,046 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-07-23 15:20:59,047 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:20:59,047 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand 91 states. [2018-07-23 15:20:59,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:59,378 INFO L93 Difference]: Finished difference Result 273 states and 274 transitions. [2018-07-23 15:20:59,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2018-07-23 15:20:59,378 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 264 [2018-07-23 15:20:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:59,379 INFO L225 Difference]: With dead ends: 273 [2018-07-23 15:20:59,379 INFO L226 Difference]: Without dead ends: 271 [2018-07-23 15:20:59,380 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7656 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:20:59,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-07-23 15:20:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 267. [2018-07-23 15:20:59,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-07-23 15:20:59,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2018-07-23 15:20:59,411 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 264 [2018-07-23 15:20:59,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:59,412 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2018-07-23 15:20:59,412 INFO L472 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-07-23 15:20:59,412 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2018-07-23 15:20:59,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-07-23 15:20:59,412 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:59,412 INFO L353 BasicCegarLoop]: trace histogram [88, 87, 87, 1, 1, 1, 1] [2018-07-23 15:20:59,413 INFO L414 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:59,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1714024166, now seen corresponding path program 173 times [2018-07-23 15:20:59,413 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11484 backedges. 7656 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:00,119 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:00,119 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [177] total 177 [2018-07-23 15:21:00,119 INFO L450 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-07-23 15:21:00,119 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-07-23 15:21:00,120 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8009, Invalid=23497, Unknown=0, NotChecked=0, Total=31506 [2018-07-23 15:21:00,120 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 178 states. [2018-07-23 15:21:01,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:01,280 INFO L93 Difference]: Finished difference Result 447 states and 449 transitions. [2018-07-23 15:21:01,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2018-07-23 15:21:01,280 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 266 [2018-07-23 15:21:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:01,281 INFO L225 Difference]: With dead ends: 447 [2018-07-23 15:21:01,281 INFO L226 Difference]: Without dead ends: 268 [2018-07-23 15:21:01,285 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11397 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=16017, Invalid=54473, Unknown=0, NotChecked=0, Total=70490 [2018-07-23 15:21:01,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-07-23 15:21:01,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2018-07-23 15:21:01,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-07-23 15:21:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 269 transitions. [2018-07-23 15:21:01,315 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 269 transitions. Word has length 266 [2018-07-23 15:21:01,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:01,315 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 269 transitions. [2018-07-23 15:21:01,315 INFO L472 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-07-23 15:21:01,315 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 269 transitions. [2018-07-23 15:21:01,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-07-23 15:21:01,316 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:01,316 INFO L353 BasicCegarLoop]: trace histogram [88, 88, 87, 1, 1, 1, 1] [2018-07-23 15:21:01,316 INFO L414 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:01,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1055319725, now seen corresponding path program 174 times [2018-07-23 15:21:01,316 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11572 backedges. 3916 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:01,719 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:01,719 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-07-23 15:21:01,719 INFO L450 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-23 15:21:01,720 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-23 15:21:01,720 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:21:01,720 INFO L87 Difference]: Start difference. First operand 268 states and 269 transitions. Second operand 92 states. [2018-07-23 15:21:02,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:02,056 INFO L93 Difference]: Finished difference Result 276 states and 277 transitions. [2018-07-23 15:21:02,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2018-07-23 15:21:02,056 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 267 [2018-07-23 15:21:02,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:02,057 INFO L225 Difference]: With dead ends: 276 [2018-07-23 15:21:02,057 INFO L226 Difference]: Without dead ends: 274 [2018-07-23 15:21:02,059 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7832 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2018-07-23 15:21:02,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-07-23 15:21:02,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2018-07-23 15:21:02,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-07-23 15:21:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 271 transitions. [2018-07-23 15:21:02,089 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 271 transitions. Word has length 267 [2018-07-23 15:21:02,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:02,089 INFO L471 AbstractCegarLoop]: Abstraction has 270 states and 271 transitions. [2018-07-23 15:21:02,089 INFO L472 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-23 15:21:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 271 transitions. [2018-07-23 15:21:02,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2018-07-23 15:21:02,090 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:02,090 INFO L353 BasicCegarLoop]: trace histogram [89, 88, 88, 1, 1, 1, 1] [2018-07-23 15:21:02,090 INFO L414 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:02,090 INFO L82 PathProgramCache]: Analyzing trace with hash -549907845, now seen corresponding path program 175 times [2018-07-23 15:21:02,090 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11748 backedges. 7832 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:02,753 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:02,753 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [179] total 179 [2018-07-23 15:21:02,753 INFO L450 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-07-23 15:21:02,754 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-07-23 15:21:02,755 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8189, Invalid=24031, Unknown=0, NotChecked=0, Total=32220 [2018-07-23 15:21:02,755 INFO L87 Difference]: Start difference. First operand 270 states and 271 transitions. Second operand 180 states. [2018-07-23 15:21:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:04,481 INFO L93 Difference]: Finished difference Result 452 states and 454 transitions. [2018-07-23 15:21:04,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2018-07-23 15:21:04,481 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 269 [2018-07-23 15:21:04,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:04,482 INFO L225 Difference]: With dead ends: 452 [2018-07-23 15:21:04,482 INFO L226 Difference]: Without dead ends: 271 [2018-07-23 15:21:04,483 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11660 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=16377, Invalid=55715, Unknown=0, NotChecked=0, Total=72092 [2018-07-23 15:21:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-07-23 15:21:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-07-23 15:21:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-07-23 15:21:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2018-07-23 15:21:04,513 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 269 [2018-07-23 15:21:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:04,513 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2018-07-23 15:21:04,513 INFO L472 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-07-23 15:21:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2018-07-23 15:21:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-07-23 15:21:04,514 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:04,514 INFO L353 BasicCegarLoop]: trace histogram [89, 89, 88, 1, 1, 1, 1] [2018-07-23 15:21:04,514 INFO L414 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:04,514 INFO L82 PathProgramCache]: Analyzing trace with hash -791481438, now seen corresponding path program 176 times [2018-07-23 15:21:04,514 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11837 backedges. 4005 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:04,913 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:04,913 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-07-23 15:21:04,914 INFO L450 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-23 15:21:04,914 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-23 15:21:04,914 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:21:04,914 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 93 states. [2018-07-23 15:21:05,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:05,252 INFO L93 Difference]: Finished difference Result 279 states and 280 transitions. [2018-07-23 15:21:05,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2018-07-23 15:21:05,252 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 270 [2018-07-23 15:21:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:05,253 INFO L225 Difference]: With dead ends: 279 [2018-07-23 15:21:05,253 INFO L226 Difference]: Without dead ends: 277 [2018-07-23 15:21:05,255 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8010 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2018-07-23 15:21:05,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-07-23 15:21:05,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 273. [2018-07-23 15:21:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-07-23 15:21:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 274 transitions. [2018-07-23 15:21:05,306 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 274 transitions. Word has length 270 [2018-07-23 15:21:05,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:05,307 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 274 transitions. [2018-07-23 15:21:05,307 INFO L472 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-23 15:21:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 274 transitions. [2018-07-23 15:21:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-07-23 15:21:05,308 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:05,308 INFO L353 BasicCegarLoop]: trace histogram [90, 89, 89, 1, 1, 1, 1] [2018-07-23 15:21:05,309 INFO L414 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:05,309 INFO L82 PathProgramCache]: Analyzing trace with hash -404384502, now seen corresponding path program 177 times [2018-07-23 15:21:05,309 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 8010 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:06,021 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:06,022 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [181] total 181 [2018-07-23 15:21:06,022 INFO L450 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-07-23 15:21:06,023 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-07-23 15:21:06,024 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8371, Invalid=24571, Unknown=0, NotChecked=0, Total=32942 [2018-07-23 15:21:06,024 INFO L87 Difference]: Start difference. First operand 273 states and 274 transitions. Second operand 182 states. [2018-07-23 15:21:07,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:07,876 INFO L93 Difference]: Finished difference Result 457 states and 459 transitions. [2018-07-23 15:21:07,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2018-07-23 15:21:07,876 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 272 [2018-07-23 15:21:07,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:07,877 INFO L225 Difference]: With dead ends: 457 [2018-07-23 15:21:07,877 INFO L226 Difference]: Without dead ends: 274 [2018-07-23 15:21:07,880 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11926 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=16741, Invalid=56971, Unknown=0, NotChecked=0, Total=73712 [2018-07-23 15:21:07,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-07-23 15:21:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2018-07-23 15:21:07,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-07-23 15:21:07,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 275 transitions. [2018-07-23 15:21:07,914 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 275 transitions. Word has length 272 [2018-07-23 15:21:07,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:07,914 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 275 transitions. [2018-07-23 15:21:07,914 INFO L472 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-07-23 15:21:07,914 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 275 transitions. [2018-07-23 15:21:07,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-07-23 15:21:07,915 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:07,915 INFO L353 BasicCegarLoop]: trace histogram [90, 90, 89, 1, 1, 1, 1] [2018-07-23 15:21:07,915 INFO L414 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:07,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1241894531, now seen corresponding path program 178 times [2018-07-23 15:21:07,915 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:08,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12105 backedges. 4095 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:08,400 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:08,400 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-07-23 15:21:08,400 INFO L450 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-23 15:21:08,401 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-23 15:21:08,401 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:21:08,401 INFO L87 Difference]: Start difference. First operand 274 states and 275 transitions. Second operand 94 states. [2018-07-23 15:21:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:08,750 INFO L93 Difference]: Finished difference Result 282 states and 283 transitions. [2018-07-23 15:21:08,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2018-07-23 15:21:08,750 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 273 [2018-07-23 15:21:08,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:08,751 INFO L225 Difference]: With dead ends: 282 [2018-07-23 15:21:08,751 INFO L226 Difference]: Without dead ends: 280 [2018-07-23 15:21:08,752 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2018-07-23 15:21:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-07-23 15:21:08,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2018-07-23 15:21:08,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-07-23 15:21:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 277 transitions. [2018-07-23 15:21:08,783 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 277 transitions. Word has length 273 [2018-07-23 15:21:08,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:08,783 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 277 transitions. [2018-07-23 15:21:08,783 INFO L472 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-23 15:21:08,783 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 277 transitions. [2018-07-23 15:21:08,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-07-23 15:21:08,784 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:08,784 INFO L353 BasicCegarLoop]: trace histogram [91, 90, 90, 1, 1, 1, 1] [2018-07-23 15:21:08,784 INFO L414 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:08,784 INFO L82 PathProgramCache]: Analyzing trace with hash -540197973, now seen corresponding path program 179 times [2018-07-23 15:21:08,784 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12285 backedges. 8190 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:09,466 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:09,466 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [183] total 183 [2018-07-23 15:21:09,466 INFO L450 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-07-23 15:21:09,468 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-07-23 15:21:09,469 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8555, Invalid=25117, Unknown=0, NotChecked=0, Total=33672 [2018-07-23 15:21:09,469 INFO L87 Difference]: Start difference. First operand 276 states and 277 transitions. Second operand 184 states. [2018-07-23 15:21:11,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:11,355 INFO L93 Difference]: Finished difference Result 462 states and 464 transitions. [2018-07-23 15:21:11,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2018-07-23 15:21:11,355 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 275 [2018-07-23 15:21:11,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:11,356 INFO L225 Difference]: With dead ends: 462 [2018-07-23 15:21:11,356 INFO L226 Difference]: Without dead ends: 277 [2018-07-23 15:21:11,360 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12195 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17109, Invalid=58241, Unknown=0, NotChecked=0, Total=75350 [2018-07-23 15:21:11,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-07-23 15:21:11,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2018-07-23 15:21:11,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-07-23 15:21:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2018-07-23 15:21:11,391 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 275 [2018-07-23 15:21:11,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:11,391 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2018-07-23 15:21:11,391 INFO L472 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-07-23 15:21:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2018-07-23 15:21:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-07-23 15:21:11,392 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:11,392 INFO L353 BasicCegarLoop]: trace histogram [91, 91, 90, 1, 1, 1, 1] [2018-07-23 15:21:11,392 INFO L414 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:11,392 INFO L82 PathProgramCache]: Analyzing trace with hash -473078894, now seen corresponding path program 180 times [2018-07-23 15:21:11,392 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12376 backedges. 4186 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:11,831 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:11,831 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2018-07-23 15:21:11,831 INFO L450 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-07-23 15:21:11,832 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-07-23 15:21:11,832 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:21:11,832 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand 95 states. [2018-07-23 15:21:12,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:12,212 INFO L93 Difference]: Finished difference Result 285 states and 286 transitions. [2018-07-23 15:21:12,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2018-07-23 15:21:12,212 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 276 [2018-07-23 15:21:12,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:12,213 INFO L225 Difference]: With dead ends: 285 [2018-07-23 15:21:12,213 INFO L226 Difference]: Without dead ends: 283 [2018-07-23 15:21:12,215 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8372 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2018-07-23 15:21:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-07-23 15:21:12,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2018-07-23 15:21:12,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-07-23 15:21:12,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2018-07-23 15:21:12,307 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 276 [2018-07-23 15:21:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:12,307 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2018-07-23 15:21:12,307 INFO L472 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-07-23 15:21:12,307 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2018-07-23 15:21:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-07-23 15:21:12,308 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:12,308 INFO L353 BasicCegarLoop]: trace histogram [92, 91, 91, 1, 1, 1, 1] [2018-07-23 15:21:12,308 INFO L414 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:12,308 INFO L82 PathProgramCache]: Analyzing trace with hash 637782266, now seen corresponding path program 181 times [2018-07-23 15:21:12,308 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12558 backedges. 8372 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:13,013 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:13,013 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [185] total 185 [2018-07-23 15:21:13,013 INFO L450 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-07-23 15:21:13,014 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-07-23 15:21:13,015 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8741, Invalid=25669, Unknown=0, NotChecked=0, Total=34410 [2018-07-23 15:21:13,016 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand 186 states. [2018-07-23 15:21:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:14,391 INFO L93 Difference]: Finished difference Result 467 states and 469 transitions. [2018-07-23 15:21:14,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2018-07-23 15:21:14,392 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 278 [2018-07-23 15:21:14,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:14,392 INFO L225 Difference]: With dead ends: 467 [2018-07-23 15:21:14,392 INFO L226 Difference]: Without dead ends: 280 [2018-07-23 15:21:14,397 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12467 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=17481, Invalid=59525, Unknown=0, NotChecked=0, Total=77006 [2018-07-23 15:21:14,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-07-23 15:21:14,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2018-07-23 15:21:14,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-07-23 15:21:14,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 281 transitions. [2018-07-23 15:21:14,429 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 281 transitions. Word has length 278 [2018-07-23 15:21:14,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:14,429 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 281 transitions. [2018-07-23 15:21:14,429 INFO L472 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-07-23 15:21:14,429 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 281 transitions. [2018-07-23 15:21:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-07-23 15:21:14,430 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:14,430 INFO L353 BasicCegarLoop]: trace histogram [92, 92, 91, 1, 1, 1, 1] [2018-07-23 15:21:14,430 INFO L414 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:14,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1272495181, now seen corresponding path program 182 times [2018-07-23 15:21:14,431 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12650 backedges. 4278 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:14,876 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:14,876 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-07-23 15:21:14,877 INFO L450 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-23 15:21:14,877 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-23 15:21:14,877 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:21:14,878 INFO L87 Difference]: Start difference. First operand 280 states and 281 transitions. Second operand 96 states. [2018-07-23 15:21:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:15,239 INFO L93 Difference]: Finished difference Result 288 states and 289 transitions. [2018-07-23 15:21:15,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2018-07-23 15:21:15,239 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 279 [2018-07-23 15:21:15,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:15,239 INFO L225 Difference]: With dead ends: 288 [2018-07-23 15:21:15,239 INFO L226 Difference]: Without dead ends: 286 [2018-07-23 15:21:15,241 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8556 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2018-07-23 15:21:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-07-23 15:21:15,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2018-07-23 15:21:15,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-07-23 15:21:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 283 transitions. [2018-07-23 15:21:15,273 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 283 transitions. Word has length 279 [2018-07-23 15:21:15,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:15,273 INFO L471 AbstractCegarLoop]: Abstraction has 282 states and 283 transitions. [2018-07-23 15:21:15,273 INFO L472 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-23 15:21:15,273 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 283 transitions. [2018-07-23 15:21:15,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-07-23 15:21:15,274 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:15,274 INFO L353 BasicCegarLoop]: trace histogram [93, 92, 92, 1, 1, 1, 1] [2018-07-23 15:21:15,274 INFO L414 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:15,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1197876443, now seen corresponding path program 183 times [2018-07-23 15:21:15,274 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12834 backedges. 8556 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:16,029 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:16,029 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [187] total 187 [2018-07-23 15:21:16,029 INFO L450 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-07-23 15:21:16,030 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-07-23 15:21:16,031 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8929, Invalid=26227, Unknown=0, NotChecked=0, Total=35156 [2018-07-23 15:21:16,031 INFO L87 Difference]: Start difference. First operand 282 states and 283 transitions. Second operand 188 states. [2018-07-23 15:21:16,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:16,801 INFO L93 Difference]: Finished difference Result 472 states and 474 transitions. [2018-07-23 15:21:16,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2018-07-23 15:21:16,802 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 281 [2018-07-23 15:21:16,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:16,802 INFO L225 Difference]: With dead ends: 472 [2018-07-23 15:21:16,802 INFO L226 Difference]: Without dead ends: 283 [2018-07-23 15:21:16,807 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12742 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=17857, Invalid=60823, Unknown=0, NotChecked=0, Total=78680 [2018-07-23 15:21:16,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-07-23 15:21:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-07-23 15:21:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-07-23 15:21:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2018-07-23 15:21:16,839 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 281 [2018-07-23 15:21:16,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:16,840 INFO L471 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2018-07-23 15:21:16,840 INFO L472 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-07-23 15:21:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2018-07-23 15:21:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-07-23 15:21:16,840 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:16,841 INFO L353 BasicCegarLoop]: trace histogram [93, 93, 92, 1, 1, 1, 1] [2018-07-23 15:21:16,841 INFO L414 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:16,841 INFO L82 PathProgramCache]: Analyzing trace with hash 439124866, now seen corresponding path program 184 times [2018-07-23 15:21:16,841 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12927 backedges. 4371 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:17,289 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:17,289 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-07-23 15:21:17,290 INFO L450 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-07-23 15:21:17,290 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-07-23 15:21:17,290 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:21:17,291 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand 97 states. [2018-07-23 15:21:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:17,650 INFO L93 Difference]: Finished difference Result 291 states and 292 transitions. [2018-07-23 15:21:17,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2018-07-23 15:21:17,650 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 282 [2018-07-23 15:21:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:17,650 INFO L225 Difference]: With dead ends: 291 [2018-07-23 15:21:17,650 INFO L226 Difference]: Without dead ends: 289 [2018-07-23 15:21:17,652 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8742 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2018-07-23 15:21:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-07-23 15:21:17,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 285. [2018-07-23 15:21:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-07-23 15:21:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2018-07-23 15:21:17,685 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 282 [2018-07-23 15:21:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:17,686 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2018-07-23 15:21:17,686 INFO L472 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-07-23 15:21:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2018-07-23 15:21:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-07-23 15:21:17,686 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:17,686 INFO L353 BasicCegarLoop]: trace histogram [94, 93, 93, 1, 1, 1, 1] [2018-07-23 15:21:17,687 INFO L414 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:17,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1092267242, now seen corresponding path program 185 times [2018-07-23 15:21:17,687 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 8742 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:18,423 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:18,423 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [189] total 189 [2018-07-23 15:21:18,423 INFO L450 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-07-23 15:21:18,424 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-07-23 15:21:18,426 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9119, Invalid=26791, Unknown=0, NotChecked=0, Total=35910 [2018-07-23 15:21:18,426 INFO L87 Difference]: Start difference. First operand 285 states and 286 transitions. Second operand 190 states. [2018-07-23 15:21:20,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:20,628 INFO L93 Difference]: Finished difference Result 477 states and 479 transitions. [2018-07-23 15:21:20,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2018-07-23 15:21:20,628 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 284 [2018-07-23 15:21:20,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:20,629 INFO L225 Difference]: With dead ends: 477 [2018-07-23 15:21:20,629 INFO L226 Difference]: Without dead ends: 286 [2018-07-23 15:21:20,632 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13020 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=18237, Invalid=62135, Unknown=0, NotChecked=0, Total=80372 [2018-07-23 15:21:20,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-07-23 15:21:20,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2018-07-23 15:21:20,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-07-23 15:21:20,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2018-07-23 15:21:20,671 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 284 [2018-07-23 15:21:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:20,671 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2018-07-23 15:21:20,671 INFO L472 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-07-23 15:21:20,671 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2018-07-23 15:21:20,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-07-23 15:21:20,672 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:20,672 INFO L353 BasicCegarLoop]: trace histogram [94, 94, 93, 1, 1, 1, 1] [2018-07-23 15:21:20,672 INFO L414 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:20,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1536915683, now seen corresponding path program 186 times [2018-07-23 15:21:20,672 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13207 backedges. 4465 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:21,216 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:21,216 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-07-23 15:21:21,217 INFO L450 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-07-23 15:21:21,217 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-07-23 15:21:21,217 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:21:21,218 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand 98 states. [2018-07-23 15:21:21,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:21,587 INFO L93 Difference]: Finished difference Result 294 states and 295 transitions. [2018-07-23 15:21:21,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2018-07-23 15:21:21,588 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 285 [2018-07-23 15:21:21,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:21,588 INFO L225 Difference]: With dead ends: 294 [2018-07-23 15:21:21,588 INFO L226 Difference]: Without dead ends: 292 [2018-07-23 15:21:21,590 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8930 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2018-07-23 15:21:21,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-07-23 15:21:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2018-07-23 15:21:21,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-07-23 15:21:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 289 transitions. [2018-07-23 15:21:21,623 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 289 transitions. Word has length 285 [2018-07-23 15:21:21,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:21,624 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 289 transitions. [2018-07-23 15:21:21,624 INFO L472 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-07-23 15:21:21,624 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 289 transitions. [2018-07-23 15:21:21,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-07-23 15:21:21,625 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:21,625 INFO L353 BasicCegarLoop]: trace histogram [95, 94, 94, 1, 1, 1, 1] [2018-07-23 15:21:21,625 INFO L414 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:21,625 INFO L82 PathProgramCache]: Analyzing trace with hash -492712437, now seen corresponding path program 187 times [2018-07-23 15:21:21,625 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 8930 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:22,359 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:22,359 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [191] total 191 [2018-07-23 15:21:22,359 INFO L450 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-07-23 15:21:22,360 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-07-23 15:21:22,362 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9311, Invalid=27361, Unknown=0, NotChecked=0, Total=36672 [2018-07-23 15:21:22,362 INFO L87 Difference]: Start difference. First operand 288 states and 289 transitions. Second operand 192 states. [2018-07-23 15:21:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:23,559 INFO L93 Difference]: Finished difference Result 482 states and 484 transitions. [2018-07-23 15:21:23,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2018-07-23 15:21:23,559 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 287 [2018-07-23 15:21:23,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:23,560 INFO L225 Difference]: With dead ends: 482 [2018-07-23 15:21:23,560 INFO L226 Difference]: Without dead ends: 289 [2018-07-23 15:21:23,564 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13301 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=18621, Invalid=63461, Unknown=0, NotChecked=0, Total=82082 [2018-07-23 15:21:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-07-23 15:21:23,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2018-07-23 15:21:23,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-07-23 15:21:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2018-07-23 15:21:23,663 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 287 [2018-07-23 15:21:23,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:23,663 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2018-07-23 15:21:23,663 INFO L472 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-07-23 15:21:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2018-07-23 15:21:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-07-23 15:21:23,664 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:23,664 INFO L353 BasicCegarLoop]: trace histogram [95, 95, 94, 1, 1, 1, 1] [2018-07-23 15:21:23,664 INFO L414 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:23,664 INFO L82 PathProgramCache]: Analyzing trace with hash 349852530, now seen corresponding path program 188 times [2018-07-23 15:21:23,664 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13490 backedges. 4560 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:24,214 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:24,214 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2018-07-23 15:21:24,214 INFO L450 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-07-23 15:21:24,215 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-07-23 15:21:24,215 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:21:24,215 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand 99 states. [2018-07-23 15:21:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:24,575 INFO L93 Difference]: Finished difference Result 297 states and 298 transitions. [2018-07-23 15:21:24,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2018-07-23 15:21:24,575 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 288 [2018-07-23 15:21:24,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:24,576 INFO L225 Difference]: With dead ends: 297 [2018-07-23 15:21:24,576 INFO L226 Difference]: Without dead ends: 295 [2018-07-23 15:21:24,579 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2018-07-23 15:21:24,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-07-23 15:21:24,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 291. [2018-07-23 15:21:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-07-23 15:21:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2018-07-23 15:21:24,616 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 288 [2018-07-23 15:21:24,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:24,616 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2018-07-23 15:21:24,616 INFO L472 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-07-23 15:21:24,616 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2018-07-23 15:21:24,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-07-23 15:21:24,617 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:24,617 INFO L353 BasicCegarLoop]: trace histogram [96, 95, 95, 1, 1, 1, 1] [2018-07-23 15:21:24,617 INFO L414 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:24,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1200898266, now seen corresponding path program 189 times [2018-07-23 15:21:24,618 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 9120 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:25,381 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:25,381 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [193] total 193 [2018-07-23 15:21:25,382 INFO L450 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-07-23 15:21:25,383 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-07-23 15:21:25,384 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9505, Invalid=27937, Unknown=0, NotChecked=0, Total=37442 [2018-07-23 15:21:25,384 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand 194 states. [2018-07-23 15:21:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:27,477 INFO L93 Difference]: Finished difference Result 487 states and 489 transitions. [2018-07-23 15:21:27,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2018-07-23 15:21:27,477 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 290 [2018-07-23 15:21:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:27,478 INFO L225 Difference]: With dead ends: 487 [2018-07-23 15:21:27,478 INFO L226 Difference]: Without dead ends: 292 [2018-07-23 15:21:27,482 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13585 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=19009, Invalid=64801, Unknown=0, NotChecked=0, Total=83810 [2018-07-23 15:21:27,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-07-23 15:21:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2018-07-23 15:21:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-07-23 15:21:27,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 293 transitions. [2018-07-23 15:21:27,516 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 293 transitions. Word has length 290 [2018-07-23 15:21:27,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:27,516 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 293 transitions. [2018-07-23 15:21:27,516 INFO L472 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-07-23 15:21:27,517 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 293 transitions. [2018-07-23 15:21:27,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-07-23 15:21:27,517 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:27,517 INFO L353 BasicCegarLoop]: trace histogram [96, 96, 95, 1, 1, 1, 1] [2018-07-23 15:21:27,517 INFO L414 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:27,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2030014957, now seen corresponding path program 190 times [2018-07-23 15:21:27,518 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13776 backedges. 4656 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:28,064 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:28,064 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-07-23 15:21:28,064 INFO L450 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-07-23 15:21:28,065 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-07-23 15:21:28,066 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:21:28,066 INFO L87 Difference]: Start difference. First operand 292 states and 293 transitions. Second operand 100 states. [2018-07-23 15:21:28,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:28,453 INFO L93 Difference]: Finished difference Result 300 states and 301 transitions. [2018-07-23 15:21:28,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2018-07-23 15:21:28,454 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 291 [2018-07-23 15:21:28,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:28,454 INFO L225 Difference]: With dead ends: 300 [2018-07-23 15:21:28,454 INFO L226 Difference]: Without dead ends: 298 [2018-07-23 15:21:28,457 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9312 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2018-07-23 15:21:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-07-23 15:21:28,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2018-07-23 15:21:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-07-23 15:21:28,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 295 transitions. [2018-07-23 15:21:28,492 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 295 transitions. Word has length 291 [2018-07-23 15:21:28,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:28,492 INFO L471 AbstractCegarLoop]: Abstraction has 294 states and 295 transitions. [2018-07-23 15:21:28,492 INFO L472 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-07-23 15:21:28,492 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 295 transitions. [2018-07-23 15:21:28,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-07-23 15:21:28,493 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:28,494 INFO L353 BasicCegarLoop]: trace histogram [97, 96, 96, 1, 1, 1, 1] [2018-07-23 15:21:28,494 INFO L414 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:28,494 INFO L82 PathProgramCache]: Analyzing trace with hash -929155269, now seen corresponding path program 191 times [2018-07-23 15:21:28,494 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13968 backedges. 9312 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:29,284 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:29,284 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [195] total 195 [2018-07-23 15:21:29,284 INFO L450 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-07-23 15:21:29,285 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-07-23 15:21:29,287 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9701, Invalid=28519, Unknown=0, NotChecked=0, Total=38220 [2018-07-23 15:21:29,287 INFO L87 Difference]: Start difference. First operand 294 states and 295 transitions. Second operand 196 states. [2018-07-23 15:21:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:31,599 INFO L93 Difference]: Finished difference Result 492 states and 494 transitions. [2018-07-23 15:21:31,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2018-07-23 15:21:31,599 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 293 [2018-07-23 15:21:31,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:31,600 INFO L225 Difference]: With dead ends: 492 [2018-07-23 15:21:31,600 INFO L226 Difference]: Without dead ends: 295 [2018-07-23 15:21:31,605 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13872 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=19401, Invalid=66155, Unknown=0, NotChecked=0, Total=85556 [2018-07-23 15:21:31,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-07-23 15:21:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-07-23 15:21:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-07-23 15:21:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2018-07-23 15:21:31,640 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 293 [2018-07-23 15:21:31,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:31,640 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2018-07-23 15:21:31,640 INFO L472 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-07-23 15:21:31,640 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2018-07-23 15:21:31,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-07-23 15:21:31,641 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:31,641 INFO L353 BasicCegarLoop]: trace histogram [97, 97, 96, 1, 1, 1, 1] [2018-07-23 15:21:31,641 INFO L414 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:31,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1447088994, now seen corresponding path program 192 times [2018-07-23 15:21:31,642 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 14065 backedges. 4753 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:32,214 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:32,214 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2018-07-23 15:21:32,214 INFO L450 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-07-23 15:21:32,215 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-07-23 15:21:32,215 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:21:32,215 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 101 states. [2018-07-23 15:21:32,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:32,603 INFO L93 Difference]: Finished difference Result 303 states and 304 transitions. [2018-07-23 15:21:32,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2018-07-23 15:21:32,603 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 294 [2018-07-23 15:21:32,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:32,604 INFO L225 Difference]: With dead ends: 303 [2018-07-23 15:21:32,604 INFO L226 Difference]: Without dead ends: 301 [2018-07-23 15:21:32,605 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9506 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2018-07-23 15:21:32,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-07-23 15:21:32,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 297. [2018-07-23 15:21:32,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-07-23 15:21:32,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 298 transitions. [2018-07-23 15:21:32,640 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 298 transitions. Word has length 294 [2018-07-23 15:21:32,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:32,641 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 298 transitions. [2018-07-23 15:21:32,641 INFO L472 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-07-23 15:21:32,641 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 298 transitions. [2018-07-23 15:21:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-07-23 15:21:32,642 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:32,642 INFO L353 BasicCegarLoop]: trace histogram [98, 97, 97, 1, 1, 1, 1] [2018-07-23 15:21:32,642 INFO L414 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:32,643 INFO L82 PathProgramCache]: Analyzing trace with hash -916814646, now seen corresponding path program 193 times [2018-07-23 15:21:32,643 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14259 backedges. 9506 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:33,456 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:33,456 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [197] total 197 [2018-07-23 15:21:33,456 INFO L450 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-07-23 15:21:33,457 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-07-23 15:21:33,459 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9899, Invalid=29107, Unknown=0, NotChecked=0, Total=39006 [2018-07-23 15:21:33,459 INFO L87 Difference]: Start difference. First operand 297 states and 298 transitions. Second operand 198 states. [2018-07-23 15:21:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:35,702 INFO L93 Difference]: Finished difference Result 497 states and 499 transitions. [2018-07-23 15:21:35,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2018-07-23 15:21:35,702 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 296 [2018-07-23 15:21:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:35,702 INFO L225 Difference]: With dead ends: 497 [2018-07-23 15:21:35,702 INFO L226 Difference]: Without dead ends: 298 [2018-07-23 15:21:35,707 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14162 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=19797, Invalid=67523, Unknown=0, NotChecked=0, Total=87320 [2018-07-23 15:21:35,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-07-23 15:21:35,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2018-07-23 15:21:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-07-23 15:21:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2018-07-23 15:21:35,742 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 296 [2018-07-23 15:21:35,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:35,743 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2018-07-23 15:21:35,743 INFO L472 AbstractCegarLoop]: Interpolant automaton has 198 states. [2018-07-23 15:21:35,743 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2018-07-23 15:21:35,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-07-23 15:21:35,743 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:35,744 INFO L353 BasicCegarLoop]: trace histogram [98, 98, 97, 1, 1, 1, 1] [2018-07-23 15:21:35,744 INFO L414 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:35,744 INFO L82 PathProgramCache]: Analyzing trace with hash 125051715, now seen corresponding path program 194 times [2018-07-23 15:21:35,744 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14357 backedges. 4851 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:36,308 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:36,308 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2018-07-23 15:21:36,308 INFO L450 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-07-23 15:21:36,309 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-07-23 15:21:36,309 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:21:36,309 INFO L87 Difference]: Start difference. First operand 298 states and 299 transitions. Second operand 102 states. [2018-07-23 15:21:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:36,713 INFO L93 Difference]: Finished difference Result 306 states and 307 transitions. [2018-07-23 15:21:36,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2018-07-23 15:21:36,713 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 297 [2018-07-23 15:21:36,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:36,714 INFO L225 Difference]: With dead ends: 306 [2018-07-23 15:21:36,714 INFO L226 Difference]: Without dead ends: 304 [2018-07-23 15:21:36,716 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9702 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2018-07-23 15:21:36,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2018-07-23 15:21:36,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2018-07-23 15:21:36,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-07-23 15:21:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 301 transitions. [2018-07-23 15:21:36,753 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 301 transitions. Word has length 297 [2018-07-23 15:21:36,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:36,753 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 301 transitions. [2018-07-23 15:21:36,753 INFO L472 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-07-23 15:21:36,753 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 301 transitions. [2018-07-23 15:21:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2018-07-23 15:21:36,754 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:36,754 INFO L353 BasicCegarLoop]: trace histogram [99, 98, 98, 1, 1, 1, 1] [2018-07-23 15:21:36,754 INFO L414 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:36,754 INFO L82 PathProgramCache]: Analyzing trace with hash -84320149, now seen corresponding path program 195 times [2018-07-23 15:21:36,754 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14553 backedges. 9702 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:37,587 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:37,587 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [199] total 199 [2018-07-23 15:21:37,587 INFO L450 AbstractCegarLoop]: Interpolant automaton has 200 states [2018-07-23 15:21:37,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2018-07-23 15:21:37,590 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10099, Invalid=29701, Unknown=0, NotChecked=0, Total=39800 [2018-07-23 15:21:37,590 INFO L87 Difference]: Start difference. First operand 300 states and 301 transitions. Second operand 200 states. [2018-07-23 15:21:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:40,242 INFO L93 Difference]: Finished difference Result 502 states and 504 transitions. [2018-07-23 15:21:40,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2018-07-23 15:21:40,242 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 299 [2018-07-23 15:21:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:40,243 INFO L225 Difference]: With dead ends: 502 [2018-07-23 15:21:40,243 INFO L226 Difference]: Without dead ends: 301 [2018-07-23 15:21:40,250 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14455 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=20197, Invalid=68905, Unknown=0, NotChecked=0, Total=89102 [2018-07-23 15:21:40,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-07-23 15:21:40,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2018-07-23 15:21:40,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-07-23 15:21:40,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 302 transitions. [2018-07-23 15:21:40,293 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 302 transitions. Word has length 299 [2018-07-23 15:21:40,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:40,293 INFO L471 AbstractCegarLoop]: Abstraction has 301 states and 302 transitions. [2018-07-23 15:21:40,293 INFO L472 AbstractCegarLoop]: Interpolant automaton has 200 states. [2018-07-23 15:21:40,293 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 302 transitions. [2018-07-23 15:21:40,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-07-23 15:21:40,294 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:40,294 INFO L353 BasicCegarLoop]: trace histogram [99, 99, 98, 1, 1, 1, 1] [2018-07-23 15:21:40,294 INFO L414 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:40,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1572207790, now seen corresponding path program 196 times [2018-07-23 15:21:40,295 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14652 backedges. 4950 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:40,971 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:40,971 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2018-07-23 15:21:40,972 INFO L450 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-07-23 15:21:40,972 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-07-23 15:21:40,972 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:21:40,973 INFO L87 Difference]: Start difference. First operand 301 states and 302 transitions. Second operand 103 states. [2018-07-23 15:21:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:41,408 INFO L93 Difference]: Finished difference Result 309 states and 310 transitions. [2018-07-23 15:21:41,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2018-07-23 15:21:41,408 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 300 [2018-07-23 15:21:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:41,409 INFO L225 Difference]: With dead ends: 309 [2018-07-23 15:21:41,409 INFO L226 Difference]: Without dead ends: 307 [2018-07-23 15:21:41,412 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9900 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2018-07-23 15:21:41,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-07-23 15:21:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 303. [2018-07-23 15:21:41,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-07-23 15:21:41,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 304 transitions. [2018-07-23 15:21:41,456 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 304 transitions. Word has length 300 [2018-07-23 15:21:41,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:41,457 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 304 transitions. [2018-07-23 15:21:41,457 INFO L472 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-07-23 15:21:41,457 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 304 transitions. [2018-07-23 15:21:41,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-07-23 15:21:41,458 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:41,458 INFO L353 BasicCegarLoop]: trace histogram [100, 99, 99, 1, 1, 1, 1] [2018-07-23 15:21:41,458 INFO L414 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:41,458 INFO L82 PathProgramCache]: Analyzing trace with hash 936868026, now seen corresponding path program 197 times [2018-07-23 15:21:41,458 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 9900 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:42,392 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:42,392 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [201] total 201 [2018-07-23 15:21:42,392 INFO L450 AbstractCegarLoop]: Interpolant automaton has 202 states [2018-07-23 15:21:42,393 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2018-07-23 15:21:42,395 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10301, Invalid=30301, Unknown=0, NotChecked=0, Total=40602 [2018-07-23 15:21:42,396 INFO L87 Difference]: Start difference. First operand 303 states and 304 transitions. Second operand 202 states. [2018-07-23 15:21:44,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:44,824 INFO L93 Difference]: Finished difference Result 507 states and 509 transitions. [2018-07-23 15:21:44,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2018-07-23 15:21:44,824 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 302 [2018-07-23 15:21:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:44,825 INFO L225 Difference]: With dead ends: 507 [2018-07-23 15:21:44,825 INFO L226 Difference]: Without dead ends: 304 [2018-07-23 15:21:44,829 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14751 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=20601, Invalid=70301, Unknown=0, NotChecked=0, Total=90902 [2018-07-23 15:21:44,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2018-07-23 15:21:44,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2018-07-23 15:21:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-07-23 15:21:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 305 transitions. [2018-07-23 15:21:44,866 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 305 transitions. Word has length 302 [2018-07-23 15:21:44,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:44,866 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 305 transitions. [2018-07-23 15:21:44,866 INFO L472 AbstractCegarLoop]: Interpolant automaton has 202 states. [2018-07-23 15:21:44,866 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 305 transitions. [2018-07-23 15:21:44,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-07-23 15:21:44,867 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:44,867 INFO L353 BasicCegarLoop]: trace histogram [100, 100, 99, 1, 1, 1, 1] [2018-07-23 15:21:44,867 INFO L414 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:44,867 INFO L82 PathProgramCache]: Analyzing trace with hash -661350285, now seen corresponding path program 198 times [2018-07-23 15:21:44,867 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 14950 backedges. 5050 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:45,460 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:45,460 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2018-07-23 15:21:45,460 INFO L450 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-07-23 15:21:45,461 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-07-23 15:21:45,461 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:21:45,461 INFO L87 Difference]: Start difference. First operand 304 states and 305 transitions. Second operand 104 states. [2018-07-23 15:21:45,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:45,874 INFO L93 Difference]: Finished difference Result 312 states and 313 transitions. [2018-07-23 15:21:45,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2018-07-23 15:21:45,874 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 303 [2018-07-23 15:21:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:45,875 INFO L225 Difference]: With dead ends: 312 [2018-07-23 15:21:45,875 INFO L226 Difference]: Without dead ends: 310 [2018-07-23 15:21:45,878 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2018-07-23 15:21:45,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2018-07-23 15:21:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2018-07-23 15:21:45,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2018-07-23 15:21:45,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 307 transitions. [2018-07-23 15:21:45,921 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 307 transitions. Word has length 303 [2018-07-23 15:21:45,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:45,921 INFO L471 AbstractCegarLoop]: Abstraction has 306 states and 307 transitions. [2018-07-23 15:21:45,922 INFO L472 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-07-23 15:21:45,922 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 307 transitions. [2018-07-23 15:21:45,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-07-23 15:21:45,922 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:45,923 INFO L353 BasicCegarLoop]: trace histogram [101, 100, 100, 1, 1, 1, 1] [2018-07-23 15:21:45,923 INFO L414 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:45,923 INFO L82 PathProgramCache]: Analyzing trace with hash 97601947, now seen corresponding path program 199 times [2018-07-23 15:21:45,923 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 10100 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:46,787 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:46,787 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [203] total 203 [2018-07-23 15:21:46,787 INFO L450 AbstractCegarLoop]: Interpolant automaton has 204 states [2018-07-23 15:21:46,789 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2018-07-23 15:21:46,791 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10505, Invalid=30907, Unknown=0, NotChecked=0, Total=41412 [2018-07-23 15:21:46,791 INFO L87 Difference]: Start difference. First operand 306 states and 307 transitions. Second operand 204 states. [2018-07-23 15:21:49,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:49,274 INFO L93 Difference]: Finished difference Result 512 states and 514 transitions. [2018-07-23 15:21:49,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2018-07-23 15:21:49,274 INFO L78 Accepts]: Start accepts. Automaton has 204 states. Word has length 305 [2018-07-23 15:21:49,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:49,275 INFO L225 Difference]: With dead ends: 512 [2018-07-23 15:21:49,275 INFO L226 Difference]: Without dead ends: 307 [2018-07-23 15:21:49,280 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15050 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=21009, Invalid=71711, Unknown=0, NotChecked=0, Total=92720 [2018-07-23 15:21:49,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-07-23 15:21:49,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-07-23 15:21:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-07-23 15:21:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2018-07-23 15:21:49,318 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 305 [2018-07-23 15:21:49,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:49,318 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2018-07-23 15:21:49,318 INFO L472 AbstractCegarLoop]: Interpolant automaton has 204 states. [2018-07-23 15:21:49,318 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2018-07-23 15:21:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-07-23 15:21:49,319 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:49,319 INFO L353 BasicCegarLoop]: trace histogram [101, 101, 100, 1, 1, 1, 1] [2018-07-23 15:21:49,319 INFO L414 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:49,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1583342402, now seen corresponding path program 200 times [2018-07-23 15:21:49,319 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15251 backedges. 5151 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:49,944 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:49,944 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2018-07-23 15:21:49,944 INFO L450 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-07-23 15:21:49,944 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-07-23 15:21:49,945 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:21:49,945 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 105 states. [2018-07-23 15:21:50,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:50,345 INFO L93 Difference]: Finished difference Result 315 states and 316 transitions. [2018-07-23 15:21:50,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2018-07-23 15:21:50,345 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 306 [2018-07-23 15:21:50,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:50,346 INFO L225 Difference]: With dead ends: 315 [2018-07-23 15:21:50,346 INFO L226 Difference]: Without dead ends: 313 [2018-07-23 15:21:50,348 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2018-07-23 15:21:50,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-07-23 15:21:50,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2018-07-23 15:21:50,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-07-23 15:21:50,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 310 transitions. [2018-07-23 15:21:50,385 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 310 transitions. Word has length 306 [2018-07-23 15:21:50,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:50,386 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 310 transitions. [2018-07-23 15:21:50,386 INFO L472 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-07-23 15:21:50,386 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 310 transitions. [2018-07-23 15:21:50,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-07-23 15:21:50,387 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:50,387 INFO L353 BasicCegarLoop]: trace histogram [102, 101, 101, 1, 1, 1, 1] [2018-07-23 15:21:50,387 INFO L414 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:50,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1173691562, now seen corresponding path program 201 times [2018-07-23 15:21:50,387 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 10302 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:51,285 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:51,285 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [205] total 205 [2018-07-23 15:21:51,286 INFO L450 AbstractCegarLoop]: Interpolant automaton has 206 states [2018-07-23 15:21:51,287 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2018-07-23 15:21:51,289 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10711, Invalid=31519, Unknown=0, NotChecked=0, Total=42230 [2018-07-23 15:21:51,289 INFO L87 Difference]: Start difference. First operand 309 states and 310 transitions. Second operand 206 states. [2018-07-23 15:21:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:53,845 INFO L93 Difference]: Finished difference Result 517 states and 519 transitions. [2018-07-23 15:21:53,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2018-07-23 15:21:53,845 INFO L78 Accepts]: Start accepts. Automaton has 206 states. Word has length 308 [2018-07-23 15:21:53,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:53,845 INFO L225 Difference]: With dead ends: 517 [2018-07-23 15:21:53,846 INFO L226 Difference]: Without dead ends: 310 [2018-07-23 15:21:53,851 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15352 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=21421, Invalid=73135, Unknown=0, NotChecked=0, Total=94556 [2018-07-23 15:21:53,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2018-07-23 15:21:53,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2018-07-23 15:21:53,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2018-07-23 15:21:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 311 transitions. [2018-07-23 15:21:53,889 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 311 transitions. Word has length 308 [2018-07-23 15:21:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:53,890 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 311 transitions. [2018-07-23 15:21:53,890 INFO L472 AbstractCegarLoop]: Interpolant automaton has 206 states. [2018-07-23 15:21:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 311 transitions. [2018-07-23 15:21:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-07-23 15:21:53,890 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:53,891 INFO L353 BasicCegarLoop]: trace histogram [102, 102, 101, 1, 1, 1, 1] [2018-07-23 15:21:53,891 INFO L414 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:53,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1065366109, now seen corresponding path program 202 times [2018-07-23 15:21:53,891 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 15555 backedges. 5253 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:54,538 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:54,539 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2018-07-23 15:21:54,539 INFO L450 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-07-23 15:21:54,540 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-07-23 15:21:54,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:21:54,540 INFO L87 Difference]: Start difference. First operand 310 states and 311 transitions. Second operand 106 states. [2018-07-23 15:21:55,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:55,021 INFO L93 Difference]: Finished difference Result 318 states and 319 transitions. [2018-07-23 15:21:55,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2018-07-23 15:21:55,021 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 309 [2018-07-23 15:21:55,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:55,022 INFO L225 Difference]: With dead ends: 318 [2018-07-23 15:21:55,022 INFO L226 Difference]: Without dead ends: 316 [2018-07-23 15:21:55,024 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10506 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2018-07-23 15:21:55,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2018-07-23 15:21:55,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2018-07-23 15:21:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2018-07-23 15:21:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 313 transitions. [2018-07-23 15:21:55,063 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 313 transitions. Word has length 309 [2018-07-23 15:21:55,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:55,063 INFO L471 AbstractCegarLoop]: Abstraction has 312 states and 313 transitions. [2018-07-23 15:21:55,063 INFO L472 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-07-23 15:21:55,063 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 313 transitions. [2018-07-23 15:21:55,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2018-07-23 15:21:55,064 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:55,064 INFO L353 BasicCegarLoop]: trace histogram [103, 102, 102, 1, 1, 1, 1] [2018-07-23 15:21:55,064 INFO L414 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:55,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1614548277, now seen corresponding path program 203 times [2018-07-23 15:21:55,065 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15759 backedges. 10506 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:55,970 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:55,970 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [207] total 207 [2018-07-23 15:21:55,970 INFO L450 AbstractCegarLoop]: Interpolant automaton has 208 states [2018-07-23 15:21:55,971 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2018-07-23 15:21:55,973 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10919, Invalid=32137, Unknown=0, NotChecked=0, Total=43056 [2018-07-23 15:21:55,974 INFO L87 Difference]: Start difference. First operand 312 states and 313 transitions. Second operand 208 states. [2018-07-23 15:21:58,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:58,645 INFO L93 Difference]: Finished difference Result 522 states and 524 transitions. [2018-07-23 15:21:58,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2018-07-23 15:21:58,645 INFO L78 Accepts]: Start accepts. Automaton has 208 states. Word has length 311 [2018-07-23 15:21:58,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:58,646 INFO L225 Difference]: With dead ends: 522 [2018-07-23 15:21:58,646 INFO L226 Difference]: Without dead ends: 313 [2018-07-23 15:21:58,652 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15657 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=21837, Invalid=74573, Unknown=0, NotChecked=0, Total=96410 [2018-07-23 15:21:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-07-23 15:21:58,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2018-07-23 15:21:58,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-07-23 15:21:58,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2018-07-23 15:21:58,691 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 311 [2018-07-23 15:21:58,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:58,691 INFO L471 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2018-07-23 15:21:58,691 INFO L472 AbstractCegarLoop]: Interpolant automaton has 208 states. [2018-07-23 15:21:58,691 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2018-07-23 15:21:58,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-07-23 15:21:58,692 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:58,692 INFO L353 BasicCegarLoop]: trace histogram [103, 103, 102, 1, 1, 1, 1] [2018-07-23 15:21:58,692 INFO L414 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:58,692 INFO L82 PathProgramCache]: Analyzing trace with hash -244550862, now seen corresponding path program 204 times [2018-07-23 15:21:58,692 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 15862 backedges. 5356 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:59,327 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:59,328 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2018-07-23 15:21:59,328 INFO L450 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-07-23 15:21:59,329 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-07-23 15:21:59,329 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:21:59,329 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand 107 states. [2018-07-23 15:21:59,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:59,778 INFO L93 Difference]: Finished difference Result 321 states and 322 transitions. [2018-07-23 15:21:59,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2018-07-23 15:21:59,779 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 312 [2018-07-23 15:21:59,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:59,779 INFO L225 Difference]: With dead ends: 321 [2018-07-23 15:21:59,779 INFO L226 Difference]: Without dead ends: 319 [2018-07-23 15:21:59,782 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10712 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2018-07-23 15:21:59,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-07-23 15:21:59,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 315. [2018-07-23 15:21:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-07-23 15:21:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2018-07-23 15:21:59,821 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 312 [2018-07-23 15:21:59,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:59,821 INFO L471 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2018-07-23 15:21:59,821 INFO L472 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-07-23 15:21:59,821 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2018-07-23 15:21:59,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-07-23 15:21:59,822 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:59,822 INFO L353 BasicCegarLoop]: trace histogram [104, 103, 103, 1, 1, 1, 1] [2018-07-23 15:21:59,822 INFO L414 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:59,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1209888922, now seen corresponding path program 205 times [2018-07-23 15:21:59,823 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16068 backedges. 10712 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:00,749 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:00,749 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [209] total 209 [2018-07-23 15:22:00,750 INFO L450 AbstractCegarLoop]: Interpolant automaton has 210 states [2018-07-23 15:22:00,751 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2018-07-23 15:22:00,753 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11129, Invalid=32761, Unknown=0, NotChecked=0, Total=43890 [2018-07-23 15:22:00,753 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand 210 states. [2018-07-23 15:22:03,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:03,561 INFO L93 Difference]: Finished difference Result 527 states and 529 transitions. [2018-07-23 15:22:03,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2018-07-23 15:22:03,562 INFO L78 Accepts]: Start accepts. Automaton has 210 states. Word has length 314 [2018-07-23 15:22:03,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:03,562 INFO L225 Difference]: With dead ends: 527 [2018-07-23 15:22:03,562 INFO L226 Difference]: Without dead ends: 316 [2018-07-23 15:22:03,564 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15965 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=22257, Invalid=76025, Unknown=0, NotChecked=0, Total=98282 [2018-07-23 15:22:03,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2018-07-23 15:22:03,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2018-07-23 15:22:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-07-23 15:22:03,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 317 transitions. [2018-07-23 15:22:03,609 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 317 transitions. Word has length 314 [2018-07-23 15:22:03,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:03,609 INFO L471 AbstractCegarLoop]: Abstraction has 316 states and 317 transitions. [2018-07-23 15:22:03,609 INFO L472 AbstractCegarLoop]: Interpolant automaton has 210 states. [2018-07-23 15:22:03,609 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 317 transitions. [2018-07-23 15:22:03,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-07-23 15:22:03,610 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:03,610 INFO L353 BasicCegarLoop]: trace histogram [104, 104, 103, 1, 1, 1, 1] [2018-07-23 15:22:03,610 INFO L414 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:03,611 INFO L82 PathProgramCache]: Analyzing trace with hash -271334701, now seen corresponding path program 206 times [2018-07-23 15:22:03,611 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16172 backedges. 5460 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:04,200 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:04,200 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2018-07-23 15:22:04,200 INFO L450 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-07-23 15:22:04,200 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-07-23 15:22:04,201 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:22:04,201 INFO L87 Difference]: Start difference. First operand 316 states and 317 transitions. Second operand 108 states. [2018-07-23 15:22:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:04,653 INFO L93 Difference]: Finished difference Result 324 states and 325 transitions. [2018-07-23 15:22:04,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2018-07-23 15:22:04,653 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 315 [2018-07-23 15:22:04,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:04,654 INFO L225 Difference]: With dead ends: 324 [2018-07-23 15:22:04,654 INFO L226 Difference]: Without dead ends: 322 [2018-07-23 15:22:04,656 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10920 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2018-07-23 15:22:04,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-07-23 15:22:04,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2018-07-23 15:22:04,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2018-07-23 15:22:04,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 319 transitions. [2018-07-23 15:22:04,696 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 319 transitions. Word has length 315 [2018-07-23 15:22:04,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:04,696 INFO L471 AbstractCegarLoop]: Abstraction has 318 states and 319 transitions. [2018-07-23 15:22:04,696 INFO L472 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-07-23 15:22:04,696 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 319 transitions. [2018-07-23 15:22:04,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-07-23 15:22:04,697 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:04,697 INFO L353 BasicCegarLoop]: trace histogram [105, 104, 104, 1, 1, 1, 1] [2018-07-23 15:22:04,697 INFO L414 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:04,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1240423419, now seen corresponding path program 207 times [2018-07-23 15:22:04,698 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 10920 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:05,646 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:05,646 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [211] total 211 [2018-07-23 15:22:05,646 INFO L450 AbstractCegarLoop]: Interpolant automaton has 212 states [2018-07-23 15:22:05,647 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2018-07-23 15:22:05,649 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11341, Invalid=33391, Unknown=0, NotChecked=0, Total=44732 [2018-07-23 15:22:05,650 INFO L87 Difference]: Start difference. First operand 318 states and 319 transitions. Second operand 212 states. [2018-07-23 15:22:07,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:07,533 INFO L93 Difference]: Finished difference Result 532 states and 534 transitions. [2018-07-23 15:22:07,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2018-07-23 15:22:07,533 INFO L78 Accepts]: Start accepts. Automaton has 212 states. Word has length 317 [2018-07-23 15:22:07,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:07,534 INFO L225 Difference]: With dead ends: 532 [2018-07-23 15:22:07,534 INFO L226 Difference]: Without dead ends: 319 [2018-07-23 15:22:07,536 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16276 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=22681, Invalid=77491, Unknown=0, NotChecked=0, Total=100172 [2018-07-23 15:22:07,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-07-23 15:22:07,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-07-23 15:22:07,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-07-23 15:22:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 320 transitions. [2018-07-23 15:22:07,576 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 320 transitions. Word has length 317 [2018-07-23 15:22:07,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:07,576 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 320 transitions. [2018-07-23 15:22:07,577 INFO L472 AbstractCegarLoop]: Interpolant automaton has 212 states. [2018-07-23 15:22:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 320 transitions. [2018-07-23 15:22:07,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-07-23 15:22:07,577 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:07,577 INFO L353 BasicCegarLoop]: trace histogram [105, 105, 104, 1, 1, 1, 1] [2018-07-23 15:22:07,578 INFO L414 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:07,578 INFO L82 PathProgramCache]: Analyzing trace with hash 601469730, now seen corresponding path program 208 times [2018-07-23 15:22:07,578 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16485 backedges. 5565 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:08,178 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:08,178 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2018-07-23 15:22:08,179 INFO L450 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-07-23 15:22:08,179 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-07-23 15:22:08,179 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:22:08,180 INFO L87 Difference]: Start difference. First operand 319 states and 320 transitions. Second operand 109 states. [2018-07-23 15:22:08,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:08,666 INFO L93 Difference]: Finished difference Result 327 states and 328 transitions. [2018-07-23 15:22:08,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2018-07-23 15:22:08,666 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 318 [2018-07-23 15:22:08,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:08,667 INFO L225 Difference]: With dead ends: 327 [2018-07-23 15:22:08,667 INFO L226 Difference]: Without dead ends: 325 [2018-07-23 15:22:08,670 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2018-07-23 15:22:08,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2018-07-23 15:22:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2018-07-23 15:22:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2018-07-23 15:22:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 322 transitions. [2018-07-23 15:22:08,712 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 322 transitions. Word has length 318 [2018-07-23 15:22:08,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:08,712 INFO L471 AbstractCegarLoop]: Abstraction has 321 states and 322 transitions. [2018-07-23 15:22:08,712 INFO L472 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-07-23 15:22:08,712 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 322 transitions. [2018-07-23 15:22:08,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2018-07-23 15:22:08,713 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:08,714 INFO L353 BasicCegarLoop]: trace histogram [106, 105, 105, 1, 1, 1, 1] [2018-07-23 15:22:08,714 INFO L414 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:08,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1808108406, now seen corresponding path program 209 times [2018-07-23 15:22:08,714 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16695 backedges. 11130 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:09,693 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:09,693 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [213] total 213 [2018-07-23 15:22:09,693 INFO L450 AbstractCegarLoop]: Interpolant automaton has 214 states [2018-07-23 15:22:09,695 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2018-07-23 15:22:09,697 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11555, Invalid=34027, Unknown=0, NotChecked=0, Total=45582 [2018-07-23 15:22:09,697 INFO L87 Difference]: Start difference. First operand 321 states and 322 transitions. Second operand 214 states. [2018-07-23 15:22:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:11,481 INFO L93 Difference]: Finished difference Result 537 states and 539 transitions. [2018-07-23 15:22:11,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2018-07-23 15:22:11,481 INFO L78 Accepts]: Start accepts. Automaton has 214 states. Word has length 320 [2018-07-23 15:22:11,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:11,482 INFO L225 Difference]: With dead ends: 537 [2018-07-23 15:22:11,482 INFO L226 Difference]: Without dead ends: 322 [2018-07-23 15:22:11,485 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16590 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=23109, Invalid=78971, Unknown=0, NotChecked=0, Total=102080 [2018-07-23 15:22:11,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-07-23 15:22:11,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-07-23 15:22:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-07-23 15:22:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 323 transitions. [2018-07-23 15:22:11,526 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 323 transitions. Word has length 320 [2018-07-23 15:22:11,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:11,526 INFO L471 AbstractCegarLoop]: Abstraction has 322 states and 323 transitions. [2018-07-23 15:22:11,527 INFO L472 AbstractCegarLoop]: Interpolant automaton has 214 states. [2018-07-23 15:22:11,527 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 323 transitions. [2018-07-23 15:22:11,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-07-23 15:22:11,527 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:11,527 INFO L353 BasicCegarLoop]: trace histogram [106, 106, 105, 1, 1, 1, 1] [2018-07-23 15:22:11,528 INFO L414 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:11,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1582401533, now seen corresponding path program 210 times [2018-07-23 15:22:11,528 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16801 backedges. 5671 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:12,148 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:12,148 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2018-07-23 15:22:12,148 INFO L450 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-07-23 15:22:12,149 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-07-23 15:22:12,149 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:22:12,149 INFO L87 Difference]: Start difference. First operand 322 states and 323 transitions. Second operand 110 states. [2018-07-23 15:22:12,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:12,634 INFO L93 Difference]: Finished difference Result 330 states and 331 transitions. [2018-07-23 15:22:12,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2018-07-23 15:22:12,634 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 321 [2018-07-23 15:22:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:12,635 INFO L225 Difference]: With dead ends: 330 [2018-07-23 15:22:12,635 INFO L226 Difference]: Without dead ends: 328 [2018-07-23 15:22:12,637 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2018-07-23 15:22:12,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-07-23 15:22:12,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2018-07-23 15:22:12,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-07-23 15:22:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 325 transitions. [2018-07-23 15:22:12,679 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 325 transitions. Word has length 321 [2018-07-23 15:22:12,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:12,679 INFO L471 AbstractCegarLoop]: Abstraction has 324 states and 325 transitions. [2018-07-23 15:22:12,679 INFO L472 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-07-23 15:22:12,679 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 325 transitions. [2018-07-23 15:22:12,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-07-23 15:22:12,680 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:12,680 INFO L353 BasicCegarLoop]: trace histogram [107, 106, 106, 1, 1, 1, 1] [2018-07-23 15:22:12,680 INFO L414 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:12,680 INFO L82 PathProgramCache]: Analyzing trace with hash -269384405, now seen corresponding path program 211 times [2018-07-23 15:22:12,680 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17013 backedges. 11342 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:13,682 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:13,683 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [215] total 215 [2018-07-23 15:22:13,683 INFO L450 AbstractCegarLoop]: Interpolant automaton has 216 states [2018-07-23 15:22:13,685 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2018-07-23 15:22:13,688 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11771, Invalid=34669, Unknown=0, NotChecked=0, Total=46440 [2018-07-23 15:22:13,689 INFO L87 Difference]: Start difference. First operand 324 states and 325 transitions. Second operand 216 states. [2018-07-23 15:22:15,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:15,618 INFO L93 Difference]: Finished difference Result 542 states and 544 transitions. [2018-07-23 15:22:15,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2018-07-23 15:22:15,619 INFO L78 Accepts]: Start accepts. Automaton has 216 states. Word has length 323 [2018-07-23 15:22:15,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:15,619 INFO L225 Difference]: With dead ends: 542 [2018-07-23 15:22:15,619 INFO L226 Difference]: Without dead ends: 325 [2018-07-23 15:22:15,623 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16907 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=23541, Invalid=80465, Unknown=0, NotChecked=0, Total=104006 [2018-07-23 15:22:15,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2018-07-23 15:22:15,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2018-07-23 15:22:15,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-07-23 15:22:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2018-07-23 15:22:15,664 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 323 [2018-07-23 15:22:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:15,664 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2018-07-23 15:22:15,664 INFO L472 AbstractCegarLoop]: Interpolant automaton has 216 states. [2018-07-23 15:22:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2018-07-23 15:22:15,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-07-23 15:22:15,665 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:15,665 INFO L353 BasicCegarLoop]: trace histogram [107, 107, 106, 1, 1, 1, 1] [2018-07-23 15:22:15,665 INFO L414 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:15,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2140250898, now seen corresponding path program 212 times [2018-07-23 15:22:15,665 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17120 backedges. 5778 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:16,282 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:16,282 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2018-07-23 15:22:16,282 INFO L450 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-07-23 15:22:16,282 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-07-23 15:22:16,283 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:22:16,283 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand 111 states. [2018-07-23 15:22:16,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:16,806 INFO L93 Difference]: Finished difference Result 333 states and 334 transitions. [2018-07-23 15:22:16,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2018-07-23 15:22:16,806 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 324 [2018-07-23 15:22:16,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:16,806 INFO L225 Difference]: With dead ends: 333 [2018-07-23 15:22:16,806 INFO L226 Difference]: Without dead ends: 331 [2018-07-23 15:22:16,809 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11556 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2018-07-23 15:22:16,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-07-23 15:22:16,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 327. [2018-07-23 15:22:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-07-23 15:22:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 328 transitions. [2018-07-23 15:22:16,851 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 328 transitions. Word has length 324 [2018-07-23 15:22:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:16,851 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 328 transitions. [2018-07-23 15:22:16,851 INFO L472 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-07-23 15:22:16,851 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 328 transitions. [2018-07-23 15:22:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-07-23 15:22:16,852 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:16,852 INFO L353 BasicCegarLoop]: trace histogram [108, 107, 107, 1, 1, 1, 1] [2018-07-23 15:22:16,852 INFO L414 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:16,852 INFO L82 PathProgramCache]: Analyzing trace with hash -508155782, now seen corresponding path program 213 times [2018-07-23 15:22:16,852 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 17334 backedges. 11556 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:17,940 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:17,940 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [217] total 217 [2018-07-23 15:22:17,940 INFO L450 AbstractCegarLoop]: Interpolant automaton has 218 states [2018-07-23 15:22:17,941 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2018-07-23 15:22:17,942 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11989, Invalid=35317, Unknown=0, NotChecked=0, Total=47306 [2018-07-23 15:22:17,942 INFO L87 Difference]: Start difference. First operand 327 states and 328 transitions. Second operand 218 states. [2018-07-23 15:22:19,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:19,105 INFO L93 Difference]: Finished difference Result 547 states and 549 transitions. [2018-07-23 15:22:19,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2018-07-23 15:22:19,106 INFO L78 Accepts]: Start accepts. Automaton has 218 states. Word has length 326 [2018-07-23 15:22:19,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:19,107 INFO L225 Difference]: With dead ends: 547 [2018-07-23 15:22:19,107 INFO L226 Difference]: Without dead ends: 328 [2018-07-23 15:22:19,112 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17227 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=23977, Invalid=81973, Unknown=0, NotChecked=0, Total=105950 [2018-07-23 15:22:19,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-07-23 15:22:19,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2018-07-23 15:22:19,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-07-23 15:22:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 329 transitions. [2018-07-23 15:22:19,159 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 329 transitions. Word has length 326 [2018-07-23 15:22:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:19,159 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 329 transitions. [2018-07-23 15:22:19,159 INFO L472 AbstractCegarLoop]: Interpolant automaton has 218 states. [2018-07-23 15:22:19,159 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 329 transitions. [2018-07-23 15:22:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-07-23 15:22:19,160 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:19,160 INFO L353 BasicCegarLoop]: trace histogram [108, 108, 107, 1, 1, 1, 1] [2018-07-23 15:22:19,160 INFO L414 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:19,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1146229453, now seen corresponding path program 214 times [2018-07-23 15:22:19,160 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 17442 backedges. 5886 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:19,802 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:19,802 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2018-07-23 15:22:19,803 INFO L450 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-07-23 15:22:19,803 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-07-23 15:22:19,804 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:22:19,804 INFO L87 Difference]: Start difference. First operand 328 states and 329 transitions. Second operand 112 states. [2018-07-23 15:22:20,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:20,340 INFO L93 Difference]: Finished difference Result 336 states and 337 transitions. [2018-07-23 15:22:20,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2018-07-23 15:22:20,340 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 327 [2018-07-23 15:22:20,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:20,341 INFO L225 Difference]: With dead ends: 336 [2018-07-23 15:22:20,341 INFO L226 Difference]: Without dead ends: 334 [2018-07-23 15:22:20,344 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11772 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2018-07-23 15:22:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2018-07-23 15:22:20,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2018-07-23 15:22:20,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2018-07-23 15:22:20,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 331 transitions. [2018-07-23 15:22:20,387 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 331 transitions. Word has length 327 [2018-07-23 15:22:20,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:20,387 INFO L471 AbstractCegarLoop]: Abstraction has 330 states and 331 transitions. [2018-07-23 15:22:20,387 INFO L472 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-07-23 15:22:20,387 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 331 transitions. [2018-07-23 15:22:20,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2018-07-23 15:22:20,388 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:20,388 INFO L353 BasicCegarLoop]: trace histogram [109, 108, 108, 1, 1, 1, 1] [2018-07-23 15:22:20,388 INFO L414 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:20,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2014810533, now seen corresponding path program 215 times [2018-07-23 15:22:20,389 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17658 backedges. 11772 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:21,445 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:21,445 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [219] total 219 [2018-07-23 15:22:21,445 INFO L450 AbstractCegarLoop]: Interpolant automaton has 220 states [2018-07-23 15:22:21,446 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 220 interpolants. [2018-07-23 15:22:21,448 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12209, Invalid=35971, Unknown=0, NotChecked=0, Total=48180 [2018-07-23 15:22:21,448 INFO L87 Difference]: Start difference. First operand 330 states and 331 transitions. Second operand 220 states. [2018-07-23 15:22:23,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:23,437 INFO L93 Difference]: Finished difference Result 552 states and 554 transitions. [2018-07-23 15:22:23,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2018-07-23 15:22:23,438 INFO L78 Accepts]: Start accepts. Automaton has 220 states. Word has length 329 [2018-07-23 15:22:23,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:23,438 INFO L225 Difference]: With dead ends: 552 [2018-07-23 15:22:23,438 INFO L226 Difference]: Without dead ends: 331 [2018-07-23 15:22:23,443 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17550 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=24417, Invalid=83495, Unknown=0, NotChecked=0, Total=107912 [2018-07-23 15:22:23,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-07-23 15:22:23,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-07-23 15:22:23,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-07-23 15:22:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2018-07-23 15:22:23,486 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 329 [2018-07-23 15:22:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:23,486 INFO L471 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2018-07-23 15:22:23,486 INFO L472 AbstractCegarLoop]: Interpolant automaton has 220 states. [2018-07-23 15:22:23,486 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2018-07-23 15:22:23,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-07-23 15:22:23,487 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:23,487 INFO L353 BasicCegarLoop]: trace histogram [109, 109, 108, 1, 1, 1, 1] [2018-07-23 15:22:23,487 INFO L414 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:23,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1342291198, now seen corresponding path program 216 times [2018-07-23 15:22:23,488 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17767 backedges. 5995 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:24,160 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:24,160 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2018-07-23 15:22:24,161 INFO L450 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-07-23 15:22:24,161 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-07-23 15:22:24,161 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:22:24,162 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 113 states. [2018-07-23 15:22:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:24,653 INFO L93 Difference]: Finished difference Result 339 states and 340 transitions. [2018-07-23 15:22:24,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2018-07-23 15:22:24,653 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 330 [2018-07-23 15:22:24,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:24,654 INFO L225 Difference]: With dead ends: 339 [2018-07-23 15:22:24,654 INFO L226 Difference]: Without dead ends: 337 [2018-07-23 15:22:24,656 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11990 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2018-07-23 15:22:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2018-07-23 15:22:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 333. [2018-07-23 15:22:24,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2018-07-23 15:22:24,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 334 transitions. [2018-07-23 15:22:24,700 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 334 transitions. Word has length 330 [2018-07-23 15:22:24,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:24,701 INFO L471 AbstractCegarLoop]: Abstraction has 333 states and 334 transitions. [2018-07-23 15:22:24,701 INFO L472 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-07-23 15:22:24,701 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 334 transitions. [2018-07-23 15:22:24,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-07-23 15:22:24,702 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:24,702 INFO L353 BasicCegarLoop]: trace histogram [110, 109, 109, 1, 1, 1, 1] [2018-07-23 15:22:24,702 INFO L414 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:24,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1451586454, now seen corresponding path program 217 times [2018-07-23 15:22:24,702 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17985 backedges. 11990 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:25,782 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:25,782 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [221] total 221 [2018-07-23 15:22:25,782 INFO L450 AbstractCegarLoop]: Interpolant automaton has 222 states [2018-07-23 15:22:25,784 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 222 interpolants. [2018-07-23 15:22:25,786 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12431, Invalid=36631, Unknown=0, NotChecked=0, Total=49062 [2018-07-23 15:22:25,786 INFO L87 Difference]: Start difference. First operand 333 states and 334 transitions. Second operand 222 states. [2018-07-23 15:22:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:27,487 INFO L93 Difference]: Finished difference Result 557 states and 559 transitions. [2018-07-23 15:22:27,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2018-07-23 15:22:27,487 INFO L78 Accepts]: Start accepts. Automaton has 222 states. Word has length 332 [2018-07-23 15:22:27,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:27,487 INFO L225 Difference]: With dead ends: 557 [2018-07-23 15:22:27,487 INFO L226 Difference]: Without dead ends: 334 [2018-07-23 15:22:27,494 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17876 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=24861, Invalid=85031, Unknown=0, NotChecked=0, Total=109892 [2018-07-23 15:22:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2018-07-23 15:22:27,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2018-07-23 15:22:27,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2018-07-23 15:22:27,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 335 transitions. [2018-07-23 15:22:27,538 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 335 transitions. Word has length 332 [2018-07-23 15:22:27,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:27,538 INFO L471 AbstractCegarLoop]: Abstraction has 334 states and 335 transitions. [2018-07-23 15:22:27,538 INFO L472 AbstractCegarLoop]: Interpolant automaton has 222 states. [2018-07-23 15:22:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 335 transitions. [2018-07-23 15:22:27,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-07-23 15:22:27,539 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:27,539 INFO L353 BasicCegarLoop]: trace histogram [110, 110, 109, 1, 1, 1, 1] [2018-07-23 15:22:27,539 INFO L414 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:27,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1844453987, now seen corresponding path program 218 times [2018-07-23 15:22:27,540 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18095 backedges. 6105 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:28,224 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:28,224 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2018-07-23 15:22:28,225 INFO L450 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-07-23 15:22:28,225 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-07-23 15:22:28,226 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:22:28,226 INFO L87 Difference]: Start difference. First operand 334 states and 335 transitions. Second operand 114 states. [2018-07-23 15:22:28,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:28,769 INFO L93 Difference]: Finished difference Result 342 states and 343 transitions. [2018-07-23 15:22:28,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2018-07-23 15:22:28,769 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 333 [2018-07-23 15:22:28,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:28,770 INFO L225 Difference]: With dead ends: 342 [2018-07-23 15:22:28,770 INFO L226 Difference]: Without dead ends: 340 [2018-07-23 15:22:28,772 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2018-07-23 15:22:28,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2018-07-23 15:22:28,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2018-07-23 15:22:28,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2018-07-23 15:22:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 337 transitions. [2018-07-23 15:22:28,817 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 337 transitions. Word has length 333 [2018-07-23 15:22:28,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:28,817 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 337 transitions. [2018-07-23 15:22:28,817 INFO L472 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-07-23 15:22:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 337 transitions. [2018-07-23 15:22:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2018-07-23 15:22:28,818 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:28,818 INFO L353 BasicCegarLoop]: trace histogram [111, 110, 110, 1, 1, 1, 1] [2018-07-23 15:22:28,818 INFO L414 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:28,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1301145717, now seen corresponding path program 219 times [2018-07-23 15:22:28,818 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18315 backedges. 12210 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:29,917 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:29,917 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [223] total 223 [2018-07-23 15:22:29,918 INFO L450 AbstractCegarLoop]: Interpolant automaton has 224 states [2018-07-23 15:22:29,919 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2018-07-23 15:22:29,921 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12655, Invalid=37297, Unknown=0, NotChecked=0, Total=49952 [2018-07-23 15:22:29,921 INFO L87 Difference]: Start difference. First operand 336 states and 337 transitions. Second operand 224 states. [2018-07-23 15:22:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:32,224 INFO L93 Difference]: Finished difference Result 562 states and 564 transitions. [2018-07-23 15:22:32,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2018-07-23 15:22:32,224 INFO L78 Accepts]: Start accepts. Automaton has 224 states. Word has length 335 [2018-07-23 15:22:32,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:32,225 INFO L225 Difference]: With dead ends: 562 [2018-07-23 15:22:32,225 INFO L226 Difference]: Without dead ends: 337 [2018-07-23 15:22:32,231 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18205 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=25309, Invalid=86581, Unknown=0, NotChecked=0, Total=111890 [2018-07-23 15:22:32,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2018-07-23 15:22:32,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2018-07-23 15:22:32,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2018-07-23 15:22:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 338 transitions. [2018-07-23 15:22:32,276 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 338 transitions. Word has length 335 [2018-07-23 15:22:32,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:32,276 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 338 transitions. [2018-07-23 15:22:32,277 INFO L472 AbstractCegarLoop]: Interpolant automaton has 224 states. [2018-07-23 15:22:32,277 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 338 transitions. [2018-07-23 15:22:32,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-07-23 15:22:32,277 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:32,278 INFO L353 BasicCegarLoop]: trace histogram [111, 111, 110, 1, 1, 1, 1] [2018-07-23 15:22:32,278 INFO L414 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:32,278 INFO L82 PathProgramCache]: Analyzing trace with hash -502689038, now seen corresponding path program 220 times [2018-07-23 15:22:32,278 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18426 backedges. 6216 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:33,052 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:33,052 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2018-07-23 15:22:33,052 INFO L450 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-07-23 15:22:33,053 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-07-23 15:22:33,053 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:22:33,053 INFO L87 Difference]: Start difference. First operand 337 states and 338 transitions. Second operand 115 states. [2018-07-23 15:22:33,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:33,630 INFO L93 Difference]: Finished difference Result 345 states and 346 transitions. [2018-07-23 15:22:33,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2018-07-23 15:22:33,630 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 336 [2018-07-23 15:22:33,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:33,630 INFO L225 Difference]: With dead ends: 345 [2018-07-23 15:22:33,631 INFO L226 Difference]: Without dead ends: 343 [2018-07-23 15:22:33,634 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12432 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2018-07-23 15:22:33,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-07-23 15:22:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 339. [2018-07-23 15:22:33,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-07-23 15:22:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 340 transitions. [2018-07-23 15:22:33,688 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 340 transitions. Word has length 336 [2018-07-23 15:22:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:33,689 INFO L471 AbstractCegarLoop]: Abstraction has 339 states and 340 transitions. [2018-07-23 15:22:33,689 INFO L472 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-07-23 15:22:33,689 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 340 transitions. [2018-07-23 15:22:33,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-07-23 15:22:33,690 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:33,690 INFO L353 BasicCegarLoop]: trace histogram [112, 111, 111, 1, 1, 1, 1] [2018-07-23 15:22:33,690 INFO L414 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:33,690 INFO L82 PathProgramCache]: Analyzing trace with hash -2047762342, now seen corresponding path program 221 times [2018-07-23 15:22:33,690 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18648 backedges. 12432 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:34,811 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:34,811 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [225] total 225 [2018-07-23 15:22:34,811 INFO L450 AbstractCegarLoop]: Interpolant automaton has 226 states [2018-07-23 15:22:34,813 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 226 interpolants. [2018-07-23 15:22:34,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12881, Invalid=37969, Unknown=0, NotChecked=0, Total=50850 [2018-07-23 15:22:34,815 INFO L87 Difference]: Start difference. First operand 339 states and 340 transitions. Second operand 226 states. [2018-07-23 15:22:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:37,158 INFO L93 Difference]: Finished difference Result 567 states and 569 transitions. [2018-07-23 15:22:37,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2018-07-23 15:22:37,158 INFO L78 Accepts]: Start accepts. Automaton has 226 states. Word has length 338 [2018-07-23 15:22:37,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:37,159 INFO L225 Difference]: With dead ends: 567 [2018-07-23 15:22:37,159 INFO L226 Difference]: Without dead ends: 340 [2018-07-23 15:22:37,161 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18537 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=25761, Invalid=88145, Unknown=0, NotChecked=0, Total=113906 [2018-07-23 15:22:37,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2018-07-23 15:22:37,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2018-07-23 15:22:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-07-23 15:22:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 341 transitions. [2018-07-23 15:22:37,206 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 341 transitions. Word has length 338 [2018-07-23 15:22:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:37,206 INFO L471 AbstractCegarLoop]: Abstraction has 340 states and 341 transitions. [2018-07-23 15:22:37,206 INFO L472 AbstractCegarLoop]: Interpolant automaton has 226 states. [2018-07-23 15:22:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 341 transitions. [2018-07-23 15:22:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-07-23 15:22:37,207 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:37,207 INFO L353 BasicCegarLoop]: trace histogram [112, 112, 111, 1, 1, 1, 1] [2018-07-23 15:22:37,207 INFO L414 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:37,207 INFO L82 PathProgramCache]: Analyzing trace with hash -753723501, now seen corresponding path program 222 times [2018-07-23 15:22:37,208 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18760 backedges. 6328 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:37,967 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:37,967 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115] total 115 [2018-07-23 15:22:37,967 INFO L450 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-07-23 15:22:37,968 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-07-23 15:22:37,968 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:22:37,968 INFO L87 Difference]: Start difference. First operand 340 states and 341 transitions. Second operand 116 states. [2018-07-23 15:22:38,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:38,500 INFO L93 Difference]: Finished difference Result 348 states and 349 transitions. [2018-07-23 15:22:38,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2018-07-23 15:22:38,500 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 339 [2018-07-23 15:22:38,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:38,500 INFO L225 Difference]: With dead ends: 348 [2018-07-23 15:22:38,501 INFO L226 Difference]: Without dead ends: 346 [2018-07-23 15:22:38,503 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12656 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2018-07-23 15:22:38,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2018-07-23 15:22:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 342. [2018-07-23 15:22:38,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2018-07-23 15:22:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 343 transitions. [2018-07-23 15:22:38,550 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 343 transitions. Word has length 339 [2018-07-23 15:22:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:38,550 INFO L471 AbstractCegarLoop]: Abstraction has 342 states and 343 transitions. [2018-07-23 15:22:38,550 INFO L472 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-07-23 15:22:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 343 transitions. [2018-07-23 15:22:38,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-07-23 15:22:38,551 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:38,551 INFO L353 BasicCegarLoop]: trace histogram [113, 112, 112, 1, 1, 1, 1] [2018-07-23 15:22:38,551 INFO L414 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:38,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1521254587, now seen corresponding path program 223 times [2018-07-23 15:22:38,551 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18984 backedges. 12656 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:39,696 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:39,696 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [227] total 227 [2018-07-23 15:22:39,697 INFO L450 AbstractCegarLoop]: Interpolant automaton has 228 states [2018-07-23 15:22:39,698 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2018-07-23 15:22:39,700 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13109, Invalid=38647, Unknown=0, NotChecked=0, Total=51756 [2018-07-23 15:22:39,701 INFO L87 Difference]: Start difference. First operand 342 states and 343 transitions. Second operand 228 states. [2018-07-23 15:22:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:42,030 INFO L93 Difference]: Finished difference Result 572 states and 574 transitions. [2018-07-23 15:22:42,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2018-07-23 15:22:42,030 INFO L78 Accepts]: Start accepts. Automaton has 228 states. Word has length 341 [2018-07-23 15:22:42,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:42,031 INFO L225 Difference]: With dead ends: 572 [2018-07-23 15:22:42,031 INFO L226 Difference]: Without dead ends: 343 [2018-07-23 15:22:42,035 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18872 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=26217, Invalid=89723, Unknown=0, NotChecked=0, Total=115940 [2018-07-23 15:22:42,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-07-23 15:22:42,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-07-23 15:22:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-07-23 15:22:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2018-07-23 15:22:42,080 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 341 [2018-07-23 15:22:42,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:42,080 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2018-07-23 15:22:42,080 INFO L472 AbstractCegarLoop]: Interpolant automaton has 228 states. [2018-07-23 15:22:42,080 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2018-07-23 15:22:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-07-23 15:22:42,081 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:42,081 INFO L353 BasicCegarLoop]: trace histogram [113, 113, 112, 1, 1, 1, 1] [2018-07-23 15:22:42,081 INFO L414 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:42,082 INFO L82 PathProgramCache]: Analyzing trace with hash 605917922, now seen corresponding path program 224 times [2018-07-23 15:22:42,082 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 19097 backedges. 6441 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:42,801 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:42,802 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2018-07-23 15:22:42,802 INFO L450 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-07-23 15:22:42,802 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-07-23 15:22:42,803 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:22:42,803 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 117 states. [2018-07-23 15:22:43,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:43,368 INFO L93 Difference]: Finished difference Result 351 states and 352 transitions. [2018-07-23 15:22:43,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2018-07-23 15:22:43,368 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 342 [2018-07-23 15:22:43,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:43,369 INFO L225 Difference]: With dead ends: 351 [2018-07-23 15:22:43,369 INFO L226 Difference]: Without dead ends: 349 [2018-07-23 15:22:43,372 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12882 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2018-07-23 15:22:43,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2018-07-23 15:22:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2018-07-23 15:22:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2018-07-23 15:22:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 346 transitions. [2018-07-23 15:22:43,419 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 346 transitions. Word has length 342 [2018-07-23 15:22:43,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:43,420 INFO L471 AbstractCegarLoop]: Abstraction has 345 states and 346 transitions. [2018-07-23 15:22:43,420 INFO L472 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-07-23 15:22:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 346 transitions. [2018-07-23 15:22:43,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-07-23 15:22:43,421 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:43,421 INFO L353 BasicCegarLoop]: trace histogram [114, 113, 113, 1, 1, 1, 1] [2018-07-23 15:22:43,421 INFO L414 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:43,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1828363190, now seen corresponding path program 225 times [2018-07-23 15:22:43,421 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 19323 backedges. 12882 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:44,658 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:44,658 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [229] total 229 [2018-07-23 15:22:44,658 INFO L450 AbstractCegarLoop]: Interpolant automaton has 230 states [2018-07-23 15:22:44,659 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 230 interpolants. [2018-07-23 15:22:44,661 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13339, Invalid=39331, Unknown=0, NotChecked=0, Total=52670 [2018-07-23 15:22:44,661 INFO L87 Difference]: Start difference. First operand 345 states and 346 transitions. Second operand 230 states. [2018-07-23 15:22:46,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:46,418 INFO L93 Difference]: Finished difference Result 577 states and 579 transitions. [2018-07-23 15:22:46,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2018-07-23 15:22:46,418 INFO L78 Accepts]: Start accepts. Automaton has 230 states. Word has length 344 [2018-07-23 15:22:46,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:46,418 INFO L225 Difference]: With dead ends: 577 [2018-07-23 15:22:46,419 INFO L226 Difference]: Without dead ends: 346 [2018-07-23 15:22:46,423 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 342 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19210 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=26677, Invalid=91315, Unknown=0, NotChecked=0, Total=117992 [2018-07-23 15:22:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2018-07-23 15:22:46,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2018-07-23 15:22:46,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2018-07-23 15:22:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 347 transitions. [2018-07-23 15:22:46,470 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 347 transitions. Word has length 344 [2018-07-23 15:22:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:46,470 INFO L471 AbstractCegarLoop]: Abstraction has 346 states and 347 transitions. [2018-07-23 15:22:46,470 INFO L472 AbstractCegarLoop]: Interpolant automaton has 230 states. [2018-07-23 15:22:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 347 transitions. [2018-07-23 15:22:46,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2018-07-23 15:22:46,471 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:46,471 INFO L353 BasicCegarLoop]: trace histogram [114, 114, 113, 1, 1, 1, 1] [2018-07-23 15:22:46,471 INFO L414 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:46,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1875587901, now seen corresponding path program 226 times [2018-07-23 15:22:46,471 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 19437 backedges. 6555 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:47,195 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:47,195 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117] total 117 [2018-07-23 15:22:47,195 INFO L450 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-07-23 15:22:47,196 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-07-23 15:22:47,196 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:22:47,196 INFO L87 Difference]: Start difference. First operand 346 states and 347 transitions. Second operand 118 states. [2018-07-23 15:22:47,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:47,772 INFO L93 Difference]: Finished difference Result 354 states and 355 transitions. [2018-07-23 15:22:47,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2018-07-23 15:22:47,772 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 345 [2018-07-23 15:22:47,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:47,772 INFO L225 Difference]: With dead ends: 354 [2018-07-23 15:22:47,772 INFO L226 Difference]: Without dead ends: 352 [2018-07-23 15:22:47,776 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2018-07-23 15:22:47,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2018-07-23 15:22:47,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2018-07-23 15:22:47,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-07-23 15:22:47,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 349 transitions. [2018-07-23 15:22:47,824 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 349 transitions. Word has length 345 [2018-07-23 15:22:47,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:47,825 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 349 transitions. [2018-07-23 15:22:47,825 INFO L472 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-07-23 15:22:47,825 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 349 transitions. [2018-07-23 15:22:47,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-07-23 15:22:47,826 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:47,826 INFO L353 BasicCegarLoop]: trace histogram [115, 114, 114, 1, 1, 1, 1] [2018-07-23 15:22:47,826 INFO L414 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:47,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1446357483, now seen corresponding path program 227 times [2018-07-23 15:22:47,826 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 19665 backedges. 13110 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:49,065 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:49,065 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [231] total 231 [2018-07-23 15:22:49,065 INFO L450 AbstractCegarLoop]: Interpolant automaton has 232 states [2018-07-23 15:22:49,067 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 232 interpolants. [2018-07-23 15:22:49,068 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13571, Invalid=40021, Unknown=0, NotChecked=0, Total=53592 [2018-07-23 15:22:49,069 INFO L87 Difference]: Start difference. First operand 348 states and 349 transitions. Second operand 232 states. [2018-07-23 15:22:50,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:50,682 INFO L93 Difference]: Finished difference Result 582 states and 584 transitions. [2018-07-23 15:22:50,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2018-07-23 15:22:50,682 INFO L78 Accepts]: Start accepts. Automaton has 232 states. Word has length 347 [2018-07-23 15:22:50,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:50,683 INFO L225 Difference]: With dead ends: 582 [2018-07-23 15:22:50,683 INFO L226 Difference]: Without dead ends: 349 [2018-07-23 15:22:50,689 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 345 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19551 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=27141, Invalid=92921, Unknown=0, NotChecked=0, Total=120062 [2018-07-23 15:22:50,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2018-07-23 15:22:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2018-07-23 15:22:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-07-23 15:22:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 350 transitions. [2018-07-23 15:22:50,737 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 350 transitions. Word has length 347 [2018-07-23 15:22:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:50,737 INFO L471 AbstractCegarLoop]: Abstraction has 349 states and 350 transitions. [2018-07-23 15:22:50,737 INFO L472 AbstractCegarLoop]: Interpolant automaton has 232 states. [2018-07-23 15:22:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 350 transitions. [2018-07-23 15:22:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-07-23 15:22:50,738 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:50,738 INFO L353 BasicCegarLoop]: trace histogram [115, 115, 114, 1, 1, 1, 1] [2018-07-23 15:22:50,739 INFO L414 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:50,739 INFO L82 PathProgramCache]: Analyzing trace with hash -970702126, now seen corresponding path program 228 times [2018-07-23 15:22:50,739 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 19780 backedges. 6670 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:51,623 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:51,623 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2018-07-23 15:22:51,623 INFO L450 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-07-23 15:22:51,624 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-07-23 15:22:51,624 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:22:51,624 INFO L87 Difference]: Start difference. First operand 349 states and 350 transitions. Second operand 119 states. [2018-07-23 15:22:52,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:52,182 INFO L93 Difference]: Finished difference Result 357 states and 358 transitions. [2018-07-23 15:22:52,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2018-07-23 15:22:52,182 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 348 [2018-07-23 15:22:52,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:52,183 INFO L225 Difference]: With dead ends: 357 [2018-07-23 15:22:52,183 INFO L226 Difference]: Without dead ends: 355 [2018-07-23 15:22:52,186 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2018-07-23 15:22:52,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-07-23 15:22:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 351. [2018-07-23 15:22:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-07-23 15:22:52,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 352 transitions. [2018-07-23 15:22:52,234 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 352 transitions. Word has length 348 [2018-07-23 15:22:52,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:52,234 INFO L471 AbstractCegarLoop]: Abstraction has 351 states and 352 transitions. [2018-07-23 15:22:52,234 INFO L472 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-07-23 15:22:52,234 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 352 transitions. [2018-07-23 15:22:52,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-07-23 15:22:52,235 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:52,235 INFO L353 BasicCegarLoop]: trace histogram [116, 115, 115, 1, 1, 1, 1] [2018-07-23 15:22:52,236 INFO L414 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:52,236 INFO L82 PathProgramCache]: Analyzing trace with hash -836773830, now seen corresponding path program 229 times [2018-07-23 15:22:52,236 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 20010 backedges. 13340 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:53,494 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:53,494 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [233] total 233 [2018-07-23 15:22:53,495 INFO L450 AbstractCegarLoop]: Interpolant automaton has 234 states [2018-07-23 15:22:53,496 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 234 interpolants. [2018-07-23 15:22:53,498 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13805, Invalid=40717, Unknown=0, NotChecked=0, Total=54522 [2018-07-23 15:22:53,498 INFO L87 Difference]: Start difference. First operand 351 states and 352 transitions. Second operand 234 states. [2018-07-23 15:22:55,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:55,112 INFO L93 Difference]: Finished difference Result 587 states and 589 transitions. [2018-07-23 15:22:55,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2018-07-23 15:22:55,113 INFO L78 Accepts]: Start accepts. Automaton has 234 states. Word has length 350 [2018-07-23 15:22:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:55,113 INFO L225 Difference]: With dead ends: 587 [2018-07-23 15:22:55,113 INFO L226 Difference]: Without dead ends: 352 [2018-07-23 15:22:55,120 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 348 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19895 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=27609, Invalid=94541, Unknown=0, NotChecked=0, Total=122150 [2018-07-23 15:22:55,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2018-07-23 15:22:55,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2018-07-23 15:22:55,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-07-23 15:22:55,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2018-07-23 15:22:55,241 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 350 [2018-07-23 15:22:55,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:55,241 INFO L471 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2018-07-23 15:22:55,241 INFO L472 AbstractCegarLoop]: Interpolant automaton has 234 states. [2018-07-23 15:22:55,241 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2018-07-23 15:22:55,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-07-23 15:22:55,242 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:55,242 INFO L353 BasicCegarLoop]: trace histogram [116, 116, 115, 1, 1, 1, 1] [2018-07-23 15:22:55,242 INFO L414 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:55,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1962099187, now seen corresponding path program 230 times [2018-07-23 15:22:55,243 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20126 backedges. 6786 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:56,061 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:56,061 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119] total 119 [2018-07-23 15:22:56,061 INFO L450 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-07-23 15:22:56,062 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-07-23 15:22:56,062 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:22:56,062 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand 120 states. [2018-07-23 15:22:56,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:56,628 INFO L93 Difference]: Finished difference Result 360 states and 361 transitions. [2018-07-23 15:22:56,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2018-07-23 15:22:56,628 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 351 [2018-07-23 15:22:56,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:56,629 INFO L225 Difference]: With dead ends: 360 [2018-07-23 15:22:56,629 INFO L226 Difference]: Without dead ends: 358 [2018-07-23 15:22:56,633 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13572 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2018-07-23 15:22:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2018-07-23 15:22:56,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2018-07-23 15:22:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2018-07-23 15:22:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 355 transitions. [2018-07-23 15:22:56,685 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 355 transitions. Word has length 351 [2018-07-23 15:22:56,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:56,685 INFO L471 AbstractCegarLoop]: Abstraction has 354 states and 355 transitions. [2018-07-23 15:22:56,685 INFO L472 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-07-23 15:22:56,686 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 355 transitions. [2018-07-23 15:22:56,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-07-23 15:22:56,686 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:56,687 INFO L353 BasicCegarLoop]: trace histogram [117, 116, 116, 1, 1, 1, 1] [2018-07-23 15:22:56,687 INFO L414 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:56,687 INFO L82 PathProgramCache]: Analyzing trace with hash 86741787, now seen corresponding path program 231 times [2018-07-23 15:22:56,687 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20358 backedges. 13572 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:57,964 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:57,964 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [235] total 235 [2018-07-23 15:22:57,965 INFO L450 AbstractCegarLoop]: Interpolant automaton has 236 states [2018-07-23 15:22:57,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2018-07-23 15:22:57,969 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14041, Invalid=41419, Unknown=0, NotChecked=0, Total=55460 [2018-07-23 15:22:57,969 INFO L87 Difference]: Start difference. First operand 354 states and 355 transitions. Second operand 236 states. [2018-07-23 15:22:59,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:59,733 INFO L93 Difference]: Finished difference Result 592 states and 594 transitions. [2018-07-23 15:22:59,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2018-07-23 15:22:59,733 INFO L78 Accepts]: Start accepts. Automaton has 236 states. Word has length 353 [2018-07-23 15:22:59,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:59,734 INFO L225 Difference]: With dead ends: 592 [2018-07-23 15:22:59,734 INFO L226 Difference]: Without dead ends: 355 [2018-07-23 15:22:59,739 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 351 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20242 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=28081, Invalid=96175, Unknown=0, NotChecked=0, Total=124256 [2018-07-23 15:22:59,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-07-23 15:22:59,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2018-07-23 15:22:59,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-07-23 15:22:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 356 transitions. [2018-07-23 15:22:59,787 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 356 transitions. Word has length 353 [2018-07-23 15:22:59,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:59,788 INFO L471 AbstractCegarLoop]: Abstraction has 355 states and 356 transitions. [2018-07-23 15:22:59,788 INFO L472 AbstractCegarLoop]: Interpolant automaton has 236 states. [2018-07-23 15:22:59,788 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 356 transitions. [2018-07-23 15:22:59,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-07-23 15:22:59,789 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:59,789 INFO L353 BasicCegarLoop]: trace histogram [117, 117, 116, 1, 1, 1, 1] [2018-07-23 15:22:59,789 INFO L414 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:59,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1182293310, now seen corresponding path program 232 times [2018-07-23 15:22:59,789 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20475 backedges. 6903 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:00,603 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:00,603 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2018-07-23 15:23:00,603 INFO L450 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-07-23 15:23:00,604 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-07-23 15:23:00,604 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:23:00,604 INFO L87 Difference]: Start difference. First operand 355 states and 356 transitions. Second operand 121 states. [2018-07-23 15:23:01,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:01,213 INFO L93 Difference]: Finished difference Result 363 states and 364 transitions. [2018-07-23 15:23:01,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2018-07-23 15:23:01,213 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 354 [2018-07-23 15:23:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:01,214 INFO L225 Difference]: With dead ends: 363 [2018-07-23 15:23:01,214 INFO L226 Difference]: Without dead ends: 361 [2018-07-23 15:23:01,218 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13806 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2018-07-23 15:23:01,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2018-07-23 15:23:01,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 357. [2018-07-23 15:23:01,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2018-07-23 15:23:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 358 transitions. [2018-07-23 15:23:01,277 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 358 transitions. Word has length 354 [2018-07-23 15:23:01,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:01,278 INFO L471 AbstractCegarLoop]: Abstraction has 357 states and 358 transitions. [2018-07-23 15:23:01,278 INFO L472 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-07-23 15:23:01,278 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 358 transitions. [2018-07-23 15:23:01,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2018-07-23 15:23:01,279 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:01,279 INFO L353 BasicCegarLoop]: trace histogram [118, 117, 117, 1, 1, 1, 1] [2018-07-23 15:23:01,279 INFO L414 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:01,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1982528554, now seen corresponding path program 233 times [2018-07-23 15:23:01,279 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20709 backedges. 13806 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:02,700 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:02,700 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [237] total 237 [2018-07-23 15:23:02,700 INFO L450 AbstractCegarLoop]: Interpolant automaton has 238 states [2018-07-23 15:23:02,702 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 238 interpolants. [2018-07-23 15:23:02,704 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14279, Invalid=42127, Unknown=0, NotChecked=0, Total=56406 [2018-07-23 15:23:02,704 INFO L87 Difference]: Start difference. First operand 357 states and 358 transitions. Second operand 238 states. [2018-07-23 15:23:05,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:05,320 INFO L93 Difference]: Finished difference Result 597 states and 599 transitions. [2018-07-23 15:23:05,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2018-07-23 15:23:05,320 INFO L78 Accepts]: Start accepts. Automaton has 238 states. Word has length 356 [2018-07-23 15:23:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:05,321 INFO L225 Difference]: With dead ends: 597 [2018-07-23 15:23:05,321 INFO L226 Difference]: Without dead ends: 358 [2018-07-23 15:23:05,328 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20592 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=28557, Invalid=97823, Unknown=0, NotChecked=0, Total=126380 [2018-07-23 15:23:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2018-07-23 15:23:05,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2018-07-23 15:23:05,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2018-07-23 15:23:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 359 transitions. [2018-07-23 15:23:05,378 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 359 transitions. Word has length 356 [2018-07-23 15:23:05,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:05,378 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 359 transitions. [2018-07-23 15:23:05,378 INFO L472 AbstractCegarLoop]: Interpolant automaton has 238 states. [2018-07-23 15:23:05,378 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 359 transitions. [2018-07-23 15:23:05,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-07-23 15:23:05,379 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:05,379 INFO L353 BasicCegarLoop]: trace histogram [118, 118, 117, 1, 1, 1, 1] [2018-07-23 15:23:05,379 INFO L414 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:05,379 INFO L82 PathProgramCache]: Analyzing trace with hash 460093219, now seen corresponding path program 234 times [2018-07-23 15:23:05,379 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20827 backedges. 7021 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:06,232 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:06,232 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121] total 121 [2018-07-23 15:23:06,233 INFO L450 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-07-23 15:23:06,234 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-07-23 15:23:06,234 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:23:06,234 INFO L87 Difference]: Start difference. First operand 358 states and 359 transitions. Second operand 122 states. [2018-07-23 15:23:06,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:06,822 INFO L93 Difference]: Finished difference Result 366 states and 367 transitions. [2018-07-23 15:23:06,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2018-07-23 15:23:06,823 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 357 [2018-07-23 15:23:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:06,823 INFO L225 Difference]: With dead ends: 366 [2018-07-23 15:23:06,823 INFO L226 Difference]: Without dead ends: 364 [2018-07-23 15:23:06,826 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14042 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2018-07-23 15:23:06,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2018-07-23 15:23:06,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 360. [2018-07-23 15:23:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2018-07-23 15:23:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 361 transitions. [2018-07-23 15:23:06,877 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 361 transitions. Word has length 357 [2018-07-23 15:23:06,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:06,877 INFO L471 AbstractCegarLoop]: Abstraction has 360 states and 361 transitions. [2018-07-23 15:23:06,878 INFO L472 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-07-23 15:23:06,878 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 361 transitions. [2018-07-23 15:23:06,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-07-23 15:23:06,879 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:06,879 INFO L353 BasicCegarLoop]: trace histogram [119, 118, 118, 1, 1, 1, 1] [2018-07-23 15:23:06,879 INFO L414 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:06,879 INFO L82 PathProgramCache]: Analyzing trace with hash -231982005, now seen corresponding path program 235 times [2018-07-23 15:23:06,879 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 21063 backedges. 14042 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:08,219 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:08,220 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [239] total 239 [2018-07-23 15:23:08,220 INFO L450 AbstractCegarLoop]: Interpolant automaton has 240 states [2018-07-23 15:23:08,221 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 240 interpolants. [2018-07-23 15:23:08,224 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14519, Invalid=42841, Unknown=0, NotChecked=0, Total=57360 [2018-07-23 15:23:08,224 INFO L87 Difference]: Start difference. First operand 360 states and 361 transitions. Second operand 240 states. [2018-07-23 15:23:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:10,981 INFO L93 Difference]: Finished difference Result 602 states and 604 transitions. [2018-07-23 15:23:10,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2018-07-23 15:23:10,981 INFO L78 Accepts]: Start accepts. Automaton has 240 states. Word has length 359 [2018-07-23 15:23:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:10,982 INFO L225 Difference]: With dead ends: 602 [2018-07-23 15:23:10,982 INFO L226 Difference]: Without dead ends: 361 [2018-07-23 15:23:10,984 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20945 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=29037, Invalid=99485, Unknown=0, NotChecked=0, Total=128522 [2018-07-23 15:23:10,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2018-07-23 15:23:11,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2018-07-23 15:23:11,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-07-23 15:23:11,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 362 transitions. [2018-07-23 15:23:11,036 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 362 transitions. Word has length 359 [2018-07-23 15:23:11,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:11,036 INFO L471 AbstractCegarLoop]: Abstraction has 361 states and 362 transitions. [2018-07-23 15:23:11,036 INFO L472 AbstractCegarLoop]: Interpolant automaton has 240 states. [2018-07-23 15:23:11,036 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 362 transitions. [2018-07-23 15:23:11,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-07-23 15:23:11,037 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:11,037 INFO L353 BasicCegarLoop]: trace histogram [119, 119, 118, 1, 1, 1, 1] [2018-07-23 15:23:11,037 INFO L414 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:11,037 INFO L82 PathProgramCache]: Analyzing trace with hash -248401230, now seen corresponding path program 236 times [2018-07-23 15:23:11,038 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 21182 backedges. 7140 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:11,928 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:11,928 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2018-07-23 15:23:11,929 INFO L450 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-07-23 15:23:11,929 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-07-23 15:23:11,930 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2018-07-23 15:23:11,930 INFO L87 Difference]: Start difference. First operand 361 states and 362 transitions. Second operand 123 states. [2018-07-23 15:23:12,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:12,585 INFO L93 Difference]: Finished difference Result 369 states and 370 transitions. [2018-07-23 15:23:12,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2018-07-23 15:23:12,585 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 360 [2018-07-23 15:23:12,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:12,586 INFO L225 Difference]: With dead ends: 369 [2018-07-23 15:23:12,586 INFO L226 Difference]: Without dead ends: 367 [2018-07-23 15:23:12,589 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2018-07-23 15:23:12,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-07-23 15:23:12,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 363. [2018-07-23 15:23:12,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2018-07-23 15:23:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 364 transitions. [2018-07-23 15:23:12,642 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 364 transitions. Word has length 360 [2018-07-23 15:23:12,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:12,642 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 364 transitions. [2018-07-23 15:23:12,642 INFO L472 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-07-23 15:23:12,642 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 364 transitions. [2018-07-23 15:23:12,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-07-23 15:23:12,643 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:12,643 INFO L353 BasicCegarLoop]: trace histogram [120, 119, 119, 1, 1, 1, 1] [2018-07-23 15:23:12,643 INFO L414 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:12,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1804652570, now seen corresponding path program 237 times [2018-07-23 15:23:12,643 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 21420 backedges. 14280 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:14,064 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:14,064 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [241] total 241 [2018-07-23 15:23:14,064 INFO L450 AbstractCegarLoop]: Interpolant automaton has 242 states [2018-07-23 15:23:14,065 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 242 interpolants. [2018-07-23 15:23:14,066 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14761, Invalid=43561, Unknown=0, NotChecked=0, Total=58322 [2018-07-23 15:23:14,066 INFO L87 Difference]: Start difference. First operand 363 states and 364 transitions. Second operand 242 states. [2018-07-23 15:23:16,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:16,709 INFO L93 Difference]: Finished difference Result 607 states and 609 transitions. [2018-07-23 15:23:16,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2018-07-23 15:23:16,709 INFO L78 Accepts]: Start accepts. Automaton has 242 states. Word has length 362 [2018-07-23 15:23:16,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:16,709 INFO L225 Difference]: With dead ends: 607 [2018-07-23 15:23:16,710 INFO L226 Difference]: Without dead ends: 364 [2018-07-23 15:23:16,714 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 360 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21301 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=29521, Invalid=101161, Unknown=0, NotChecked=0, Total=130682 [2018-07-23 15:23:16,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2018-07-23 15:23:16,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2018-07-23 15:23:16,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-07-23 15:23:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 365 transitions. [2018-07-23 15:23:16,772 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 365 transitions. Word has length 362 [2018-07-23 15:23:16,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:16,772 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 365 transitions. [2018-07-23 15:23:16,772 INFO L472 AbstractCegarLoop]: Interpolant automaton has 242 states. [2018-07-23 15:23:16,772 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 365 transitions. [2018-07-23 15:23:16,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-07-23 15:23:16,773 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:16,773 INFO L353 BasicCegarLoop]: trace histogram [120, 120, 119, 1, 1, 1, 1] [2018-07-23 15:23:16,773 INFO L414 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:16,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2009174957, now seen corresponding path program 238 times [2018-07-23 15:23:16,774 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 21540 backedges. 7260 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:17,661 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:17,661 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123] total 123 [2018-07-23 15:23:17,661 INFO L450 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-07-23 15:23:17,662 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-07-23 15:23:17,663 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:23:17,663 INFO L87 Difference]: Start difference. First operand 364 states and 365 transitions. Second operand 124 states. [2018-07-23 15:23:18,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:18,295 INFO L93 Difference]: Finished difference Result 372 states and 373 transitions. [2018-07-23 15:23:18,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2018-07-23 15:23:18,295 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 363 [2018-07-23 15:23:18,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:18,296 INFO L225 Difference]: With dead ends: 372 [2018-07-23 15:23:18,296 INFO L226 Difference]: Without dead ends: 370 [2018-07-23 15:23:18,299 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2018-07-23 15:23:18,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2018-07-23 15:23:18,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 366. [2018-07-23 15:23:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2018-07-23 15:23:18,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 367 transitions. [2018-07-23 15:23:18,352 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 367 transitions. Word has length 363 [2018-07-23 15:23:18,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:18,352 INFO L471 AbstractCegarLoop]: Abstraction has 366 states and 367 transitions. [2018-07-23 15:23:18,352 INFO L472 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-07-23 15:23:18,352 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 367 transitions. [2018-07-23 15:23:18,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2018-07-23 15:23:18,353 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:18,353 INFO L353 BasicCegarLoop]: trace histogram [121, 120, 120, 1, 1, 1, 1] [2018-07-23 15:23:18,353 INFO L414 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:18,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1918215547, now seen corresponding path program 239 times [2018-07-23 15:23:18,354 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 21780 backedges. 14520 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:19,710 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:19,710 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [243] total 243 [2018-07-23 15:23:19,711 INFO L450 AbstractCegarLoop]: Interpolant automaton has 244 states [2018-07-23 15:23:19,712 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 244 interpolants. [2018-07-23 15:23:19,715 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15005, Invalid=44287, Unknown=0, NotChecked=0, Total=59292 [2018-07-23 15:23:19,715 INFO L87 Difference]: Start difference. First operand 366 states and 367 transitions. Second operand 244 states. [2018-07-23 15:23:21,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:21,601 INFO L93 Difference]: Finished difference Result 612 states and 614 transitions. [2018-07-23 15:23:21,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2018-07-23 15:23:21,601 INFO L78 Accepts]: Start accepts. Automaton has 244 states. Word has length 365 [2018-07-23 15:23:21,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:21,602 INFO L225 Difference]: With dead ends: 612 [2018-07-23 15:23:21,602 INFO L226 Difference]: Without dead ends: 367 [2018-07-23 15:23:21,612 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 363 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21660 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=30009, Invalid=102851, Unknown=0, NotChecked=0, Total=132860 [2018-07-23 15:23:21,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-07-23 15:23:21,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2018-07-23 15:23:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2018-07-23 15:23:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 368 transitions. [2018-07-23 15:23:21,667 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 368 transitions. Word has length 365 [2018-07-23 15:23:21,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:21,668 INFO L471 AbstractCegarLoop]: Abstraction has 367 states and 368 transitions. [2018-07-23 15:23:21,668 INFO L472 AbstractCegarLoop]: Interpolant automaton has 244 states. [2018-07-23 15:23:21,668 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 368 transitions. [2018-07-23 15:23:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-07-23 15:23:21,669 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:21,669 INFO L353 BasicCegarLoop]: trace histogram [121, 121, 120, 1, 1, 1, 1] [2018-07-23 15:23:21,669 INFO L414 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:21,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1047760222, now seen corresponding path program 240 times [2018-07-23 15:23:21,669 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 21901 backedges. 7381 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:22,631 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:22,631 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2018-07-23 15:23:22,632 INFO L450 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-07-23 15:23:22,632 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-07-23 15:23:22,633 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:23:22,633 INFO L87 Difference]: Start difference. First operand 367 states and 368 transitions. Second operand 125 states. [2018-07-23 15:23:23,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:23,234 INFO L93 Difference]: Finished difference Result 375 states and 376 transitions. [2018-07-23 15:23:23,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 246 states. [2018-07-23 15:23:23,234 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 366 [2018-07-23 15:23:23,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:23,235 INFO L225 Difference]: With dead ends: 375 [2018-07-23 15:23:23,235 INFO L226 Difference]: Without dead ends: 373 [2018-07-23 15:23:23,239 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14762 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2018-07-23 15:23:23,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2018-07-23 15:23:23,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 369. [2018-07-23 15:23:23,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-07-23 15:23:23,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 370 transitions. [2018-07-23 15:23:23,293 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 370 transitions. Word has length 366 [2018-07-23 15:23:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:23,294 INFO L471 AbstractCegarLoop]: Abstraction has 369 states and 370 transitions. [2018-07-23 15:23:23,294 INFO L472 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-07-23 15:23:23,294 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 370 transitions. [2018-07-23 15:23:23,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-07-23 15:23:23,295 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:23,295 INFO L353 BasicCegarLoop]: trace histogram [122, 121, 121, 1, 1, 1, 1] [2018-07-23 15:23:23,295 INFO L414 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:23,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1875160054, now seen corresponding path program 241 times [2018-07-23 15:23:23,295 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 22143 backedges. 14762 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:24,746 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:24,746 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [245] total 245 [2018-07-23 15:23:24,746 INFO L450 AbstractCegarLoop]: Interpolant automaton has 246 states [2018-07-23 15:23:24,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 246 interpolants. [2018-07-23 15:23:24,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15251, Invalid=45019, Unknown=0, NotChecked=0, Total=60270 [2018-07-23 15:23:24,751 INFO L87 Difference]: Start difference. First operand 369 states and 370 transitions. Second operand 246 states. Received shutdown request... [2018-07-23 15:23:25,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-07-23 15:23:25,423 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 15:23:25,429 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 15:23:25,430 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 03:23:25 BoogieIcfgContainer [2018-07-23 15:23:25,430 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 15:23:25,431 INFO L168 Benchmark]: Toolchain (without parser) took 254866.76 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 3.3 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-07-23 15:23:25,432 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 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 15:23:25,433 INFO L168 Benchmark]: Boogie Preprocessor took 49.25 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 15:23:25,433 INFO L168 Benchmark]: RCFGBuilder took 239.48 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 15:23:25,434 INFO L168 Benchmark]: TraceAbstraction took 254573.70 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 3.3 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-07-23 15:23:25,437 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 0.22 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 49.25 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 239.48 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 254573.70 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 3.3 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 76). Cancelled while BasicCegarLoop was constructing difference of abstraction (369states) and interpolant automaton (currently 148 states, 246 states before enhancement), while ReachableStatesComputation was computing reachable states (217 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 254.5s OverallTime, 243 OverallIterations, 122 TraceHistogramMax, 149.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 850 SDtfs, 3952 SDslu, 8531 SDs, 0 SdLazy, 545500 SolverSat, 27149 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45039 GetRequests, 7503 SyntacticMatches, 0 SemanticMatches, 37536 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501068 ImplicationChecksByTransitivity, 103.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=369occurred in iteration=242, 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: 6.2s AutomataMinimizationTime, 242 MinimizatonAttempts, 484 StatesRemovedByMinimization, 121 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 24.3s SatisfiabilityAnalysisTime, 65.5s InterpolantComputationTime, 45259 NumberOfCodeBlocks, 45259 NumberOfCodeBlocksAsserted, 243 NumberOfCheckSat, 45016 ConstructedInterpolants, 0 QuantifiedInterpolants, 32953656 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 243 InterpolantComputations, 2 PerfectInterpolantSequences, 907863/1800964 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/down.i_4.bplTransformedIcfg_BEv2_5.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_15-23-25-449.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bplTransformedIcfg_BEv2_5.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_15-23-25-449.csv Completed graceful shutdown