java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/Pdr/AutomizerBpl-nestedInterpolants.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Sandman01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-e6fd87c [2018-07-25 08:55:54,397 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-25 08:55:54,399 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-25 08:55:54,417 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-25 08:55:54,417 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-25 08:55:54,418 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-25 08:55:54,420 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-25 08:55:54,423 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-25 08:55:54,425 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-25 08:55:54,428 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-25 08:55:54,429 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-25 08:55:54,429 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-25 08:55:54,431 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-25 08:55:54,432 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-25 08:55:54,435 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-25 08:55:54,442 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-25 08:55:54,443 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-25 08:55:54,445 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-25 08:55:54,449 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-25 08:55:54,451 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-25 08:55:54,454 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-25 08:55:54,455 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-25 08:55:54,459 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-25 08:55:54,459 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-25 08:55:54,459 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-25 08:55:54,460 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-25 08:55:54,461 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-25 08:55:54,462 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-25 08:55:54,463 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-25 08:55:54,464 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-25 08:55:54,464 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-25 08:55:54,465 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-07-25 08:55:54,469 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/Pdr/AutomizerBpl-nestedInterpolants.epf [2018-07-25 08:55:54,495 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-25 08:55:54,495 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-25 08:55:54,496 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-25 08:55:54,496 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-25 08:55:54,497 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-25 08:55:54,497 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-25 08:55:54,497 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-25 08:55:54,497 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-25 08:55:54,556 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-25 08:55:54,572 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-25 08:55:54,578 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-25 08:55:54,579 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-25 08:55:54,580 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-25 08:55:54,581 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Sandman01.bpl [2018-07-25 08:55:54,581 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Sandman01.bpl' [2018-07-25 08:55:54,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-25 08:55:54,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-07-25 08:55:54,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-25 08:55:54,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-25 08:55:54,647 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-25 08:55:54,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Sandman01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:55:54" (1/1) ... [2018-07-25 08:55:54,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Sandman01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:55:54" (1/1) ... [2018-07-25 08:55:54,688 WARN L165 Inliner]: Program contained no entry procedure! [2018-07-25 08:55:54,689 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-07-25 08:55:54,689 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-07-25 08:55:54,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-25 08:55:54,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-25 08:55:54,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-25 08:55:54,692 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-25 08:55:54,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Sandman01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:55:54" (1/1) ... [2018-07-25 08:55:54,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Sandman01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:55:54" (1/1) ... [2018-07-25 08:55:54,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Sandman01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:55:54" (1/1) ... [2018-07-25 08:55:54,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Sandman01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:55:54" (1/1) ... [2018-07-25 08:55:54,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Sandman01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:55:54" (1/1) ... [2018-07-25 08:55:54,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Sandman01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:55:54" (1/1) ... [2018-07-25 08:55:54,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Sandman01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:55:54" (1/1) ... [2018-07-25 08:55:54,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-25 08:55:54,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-25 08:55:54,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-25 08:55:54,712 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-25 08:55:54,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Sandman01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:55:54" (1/1) ... [2018-07-25 08:55:54,797 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-07-25 08:55:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-25 08:55:54,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-25 08:55:54,956 INFO L270 CfgBuilder]: Using library mode [2018-07-25 08:55:54,957 INFO L202 PluginConnector]: Adding new model Sandman01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.07 08:55:54 BoogieIcfgContainer [2018-07-25 08:55:54,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-25 08:55:54,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-25 08:55:54,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-25 08:55:54,962 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-25 08:55:54,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Sandman01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:55:54" (1/2) ... [2018-07-25 08:55:54,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69bdebca and model type Sandman01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.07 08:55:54, skipping insertion in model container [2018-07-25 08:55:54,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Sandman01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.07 08:55:54" (2/2) ... [2018-07-25 08:55:54,967 INFO L112 eAbstractionObserver]: Analyzing ICFG Sandman01.bpl [2018-07-25 08:55:54,978 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-25 08:55:54,992 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-25 08:55:55,047 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-25 08:55:55,048 INFO L374 AbstractCegarLoop]: Interprodecural is true [2018-07-25 08:55:55,048 INFO L375 AbstractCegarLoop]: Hoare is true [2018-07-25 08:55:55,048 INFO L376 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-25 08:55:55,049 INFO L377 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-25 08:55:55,049 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-25 08:55:55,049 INFO L379 AbstractCegarLoop]: Difference is false [2018-07-25 08:55:55,049 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-25 08:55:55,049 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-25 08:55:55,070 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-07-25 08:55:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-07-25 08:55:55,083 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:55,086 INFO L354 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-07-25 08:55:55,087 INFO L415 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:55,093 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-07-25 08:55:55,101 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:55,216 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-25 08:55:55,217 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-25 08:55:55,221 INFO L451 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-25 08:55:55,233 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-25 08:55:55,233 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-25 08:55:55,236 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-07-25 08:55:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:55,273 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-07-25 08:55:55,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-25 08:55:55,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-07-25 08:55:55,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:55,289 INFO L225 Difference]: With dead ends: 13 [2018-07-25 08:55:55,289 INFO L226 Difference]: Without dead ends: 5 [2018-07-25 08:55:55,293 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-25 08:55:55,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-07-25 08:55:55,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-07-25 08:55:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-07-25 08:55:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-07-25 08:55:55,331 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-07-25 08:55:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:55,332 INFO L472 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-07-25 08:55:55,332 INFO L473 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-25 08:55:55,332 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-07-25 08:55:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-25 08:55:55,332 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:55,333 INFO L354 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-25 08:55:55,333 INFO L415 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-07-25 08:55:55,333 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:55,390 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:55,390 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-25 08:55:55,392 INFO L451 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-25 08:55:55,393 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-25 08:55:55,393 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-25 08:55:55,393 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-07-25 08:55:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:55,418 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-07-25 08:55:55,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-25 08:55:55,419 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-07-25 08:55:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:55,420 INFO L225 Difference]: With dead ends: 8 [2018-07-25 08:55:55,420 INFO L226 Difference]: Without dead ends: 6 [2018-07-25 08:55:55,421 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-25 08:55:55,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-07-25 08:55:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-07-25 08:55:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-07-25 08:55:55,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-07-25 08:55:55,424 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-07-25 08:55:55,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:55,425 INFO L472 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-07-25 08:55:55,425 INFO L473 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-25 08:55:55,425 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-07-25 08:55:55,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-07-25 08:55:55,425 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:55,426 INFO L354 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-07-25 08:55:55,426 INFO L415 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:55,426 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-07-25 08:55:55,427 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:55,526 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:55,526 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-25 08:55:55,527 INFO L451 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-25 08:55:55,527 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-25 08:55:55,527 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-25 08:55:55,528 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-07-25 08:55:55,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:55,561 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-07-25 08:55:55,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-25 08:55:55,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-07-25 08:55:55,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:55,562 INFO L225 Difference]: With dead ends: 9 [2018-07-25 08:55:55,562 INFO L226 Difference]: Without dead ends: 7 [2018-07-25 08:55:55,563 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-25 08:55:55,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-25 08:55:55,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-25 08:55:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-25 08:55:55,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-25 08:55:55,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-07-25 08:55:55,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:55,571 INFO L472 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-25 08:55:55,571 INFO L473 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-25 08:55:55,571 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-25 08:55:55,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-25 08:55:55,572 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:55,572 INFO L354 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-07-25 08:55:55,574 INFO L415 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:55,574 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-07-25 08:55:55,574 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:55,700 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:55,700 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-25 08:55:55,700 INFO L451 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-25 08:55:55,700 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-25 08:55:55,701 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-25 08:55:55,701 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-07-25 08:55:55,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:55,721 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-07-25 08:55:55,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-25 08:55:55,722 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-07-25 08:55:55,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:55,722 INFO L225 Difference]: With dead ends: 10 [2018-07-25 08:55:55,722 INFO L226 Difference]: Without dead ends: 8 [2018-07-25 08:55:55,723 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-25 08:55:55,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-07-25 08:55:55,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-07-25 08:55:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-07-25 08:55:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-07-25 08:55:55,727 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-07-25 08:55:55,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:55,728 INFO L472 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-07-25 08:55:55,728 INFO L473 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-25 08:55:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-07-25 08:55:55,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-25 08:55:55,729 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:55,729 INFO L354 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-07-25 08:55:55,729 INFO L415 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:55,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-07-25 08:55:55,730 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:55,828 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:55,828 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-25 08:55:55,830 INFO L451 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-25 08:55:55,831 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-25 08:55:55,831 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-25 08:55:55,832 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-07-25 08:55:55,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:55,867 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-07-25 08:55:55,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-25 08:55:55,868 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-07-25 08:55:55,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:55,868 INFO L225 Difference]: With dead ends: 11 [2018-07-25 08:55:55,868 INFO L226 Difference]: Without dead ends: 9 [2018-07-25 08:55:55,869 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-25 08:55:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-25 08:55:55,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-25 08:55:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-25 08:55:55,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-25 08:55:55,874 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-07-25 08:55:55,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:55,874 INFO L472 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-25 08:55:55,874 INFO L473 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-25 08:55:55,875 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-25 08:55:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-25 08:55:55,875 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:55,875 INFO L354 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-07-25 08:55:55,876 INFO L415 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:55,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-07-25 08:55:55,876 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:55,970 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:55,971 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-25 08:55:55,971 INFO L451 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-25 08:55:55,975 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-25 08:55:55,975 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-25 08:55:55,976 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-07-25 08:55:56,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:56,025 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-07-25 08:55:56,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-25 08:55:56,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-07-25 08:55:56,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:56,028 INFO L225 Difference]: With dead ends: 12 [2018-07-25 08:55:56,028 INFO L226 Difference]: Without dead ends: 10 [2018-07-25 08:55:56,029 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-25 08:55:56,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-07-25 08:55:56,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-07-25 08:55:56,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-07-25 08:55:56,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-07-25 08:55:56,044 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-07-25 08:55:56,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:56,045 INFO L472 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-07-25 08:55:56,045 INFO L473 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-25 08:55:56,045 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-07-25 08:55:56,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-07-25 08:55:56,046 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:56,046 INFO L354 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-07-25 08:55:56,046 INFO L415 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:56,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-07-25 08:55:56,047 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:56,227 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:56,228 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-25 08:55:56,228 INFO L451 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-25 08:55:56,229 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-25 08:55:56,229 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-25 08:55:56,230 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-07-25 08:55:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:56,278 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-07-25 08:55:56,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-25 08:55:56,282 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-07-25 08:55:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:56,282 INFO L225 Difference]: With dead ends: 13 [2018-07-25 08:55:56,282 INFO L226 Difference]: Without dead ends: 11 [2018-07-25 08:55:56,283 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-25 08:55:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-07-25 08:55:56,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-07-25 08:55:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-25 08:55:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-25 08:55:56,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-07-25 08:55:56,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:56,291 INFO L472 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-25 08:55:56,291 INFO L473 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-25 08:55:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-25 08:55:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-25 08:55:56,295 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:56,295 INFO L354 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-07-25 08:55:56,295 INFO L415 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:56,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-07-25 08:55:56,296 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:56,415 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:56,415 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-25 08:55:56,416 INFO L451 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-25 08:55:56,416 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-25 08:55:56,417 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-25 08:55:56,417 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-07-25 08:55:56,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:56,436 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-07-25 08:55:56,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-25 08:55:56,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-07-25 08:55:56,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:56,437 INFO L225 Difference]: With dead ends: 14 [2018-07-25 08:55:56,437 INFO L226 Difference]: Without dead ends: 12 [2018-07-25 08:55:56,438 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-25 08:55:56,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-25 08:55:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-07-25 08:55:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-25 08:55:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-07-25 08:55:56,443 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-07-25 08:55:56,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:56,449 INFO L472 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-07-25 08:55:56,449 INFO L473 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-25 08:55:56,450 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-07-25 08:55:56,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-25 08:55:56,452 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:56,452 INFO L354 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-07-25 08:55:56,452 INFO L415 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:56,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-07-25 08:55:56,453 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:56,574 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:56,575 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-25 08:55:56,575 INFO L451 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-25 08:55:56,580 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-25 08:55:56,580 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-25 08:55:56,581 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-07-25 08:55:56,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:56,608 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-07-25 08:55:56,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-25 08:55:56,610 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-07-25 08:55:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:56,611 INFO L225 Difference]: With dead ends: 15 [2018-07-25 08:55:56,611 INFO L226 Difference]: Without dead ends: 13 [2018-07-25 08:55:56,612 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-25 08:55:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-25 08:55:56,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-07-25 08:55:56,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-07-25 08:55:56,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-07-25 08:55:56,618 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-07-25 08:55:56,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:56,618 INFO L472 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-07-25 08:55:56,618 INFO L473 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-25 08:55:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-07-25 08:55:56,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-07-25 08:55:56,619 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:56,619 INFO L354 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-07-25 08:55:56,620 INFO L415 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:56,620 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-07-25 08:55:56,620 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:56,739 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:56,739 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-25 08:55:56,739 INFO L451 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-25 08:55:56,740 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-25 08:55:56,740 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-25 08:55:56,741 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-07-25 08:55:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:56,777 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-07-25 08:55:56,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-25 08:55:56,778 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-07-25 08:55:56,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:56,779 INFO L225 Difference]: With dead ends: 16 [2018-07-25 08:55:56,779 INFO L226 Difference]: Without dead ends: 14 [2018-07-25 08:55:56,780 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-25 08:55:56,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-25 08:55:56,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-25 08:55:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-25 08:55:56,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-07-25 08:55:56,787 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-07-25 08:55:56,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:56,787 INFO L472 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-07-25 08:55:56,788 INFO L473 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-25 08:55:56,788 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-07-25 08:55:56,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-25 08:55:56,791 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:56,792 INFO L354 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-07-25 08:55:56,792 INFO L415 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:56,793 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-07-25 08:55:56,793 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:56,911 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:56,911 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-07-25 08:55:56,912 INFO L451 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-25 08:55:56,912 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-25 08:55:56,912 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-25 08:55:56,913 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-07-25 08:55:56,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:56,935 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-07-25 08:55:56,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-25 08:55:56,935 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-07-25 08:55:56,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:56,936 INFO L225 Difference]: With dead ends: 17 [2018-07-25 08:55:56,936 INFO L226 Difference]: Without dead ends: 15 [2018-07-25 08:55:56,937 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-25 08:55:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-25 08:55:56,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-07-25 08:55:56,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-07-25 08:55:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-07-25 08:55:56,942 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-07-25 08:55:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:56,943 INFO L472 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-07-25 08:55:56,943 INFO L473 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-25 08:55:56,943 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-07-25 08:55:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-25 08:55:56,944 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:56,944 INFO L354 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-07-25 08:55:56,944 INFO L415 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:56,945 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-07-25 08:55:56,945 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:57,053 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:57,053 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-25 08:55:57,053 INFO L451 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-25 08:55:57,054 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-25 08:55:57,054 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-25 08:55:57,054 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-07-25 08:55:57,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:57,077 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-07-25 08:55:57,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-25 08:55:57,078 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-07-25 08:55:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:57,079 INFO L225 Difference]: With dead ends: 18 [2018-07-25 08:55:57,079 INFO L226 Difference]: Without dead ends: 16 [2018-07-25 08:55:57,080 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-25 08:55:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-25 08:55:57,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-07-25 08:55:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-25 08:55:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-07-25 08:55:57,085 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-07-25 08:55:57,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:57,086 INFO L472 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-07-25 08:55:57,086 INFO L473 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-25 08:55:57,086 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-07-25 08:55:57,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-25 08:55:57,087 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:57,087 INFO L354 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-07-25 08:55:57,087 INFO L415 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:57,088 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-07-25 08:55:57,088 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:57,213 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:57,213 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-07-25 08:55:57,214 INFO L451 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-25 08:55:57,214 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-25 08:55:57,214 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-25 08:55:57,215 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-07-25 08:55:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:57,239 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-07-25 08:55:57,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-25 08:55:57,240 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-07-25 08:55:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:57,240 INFO L225 Difference]: With dead ends: 19 [2018-07-25 08:55:57,241 INFO L226 Difference]: Without dead ends: 17 [2018-07-25 08:55:57,241 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-25 08:55:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-07-25 08:55:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-07-25 08:55:57,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-25 08:55:57,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-07-25 08:55:57,247 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-07-25 08:55:57,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:57,247 INFO L472 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-07-25 08:55:57,247 INFO L473 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-25 08:55:57,248 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-07-25 08:55:57,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-25 08:55:57,248 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:57,249 INFO L354 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-07-25 08:55:57,249 INFO L415 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:57,249 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-07-25 08:55:57,249 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:57,403 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:57,403 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-25 08:55:57,404 INFO L451 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-25 08:55:57,405 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-25 08:55:57,405 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-25 08:55:57,405 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-07-25 08:55:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:57,433 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-07-25 08:55:57,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-25 08:55:57,434 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-07-25 08:55:57,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:57,435 INFO L225 Difference]: With dead ends: 20 [2018-07-25 08:55:57,435 INFO L226 Difference]: Without dead ends: 18 [2018-07-25 08:55:57,436 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-25 08:55:57,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-25 08:55:57,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-07-25 08:55:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-25 08:55:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-07-25 08:55:57,445 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-07-25 08:55:57,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:57,445 INFO L472 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-07-25 08:55:57,446 INFO L473 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-25 08:55:57,446 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-07-25 08:55:57,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-25 08:55:57,447 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:57,448 INFO L354 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-07-25 08:55:57,448 INFO L415 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:57,448 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-07-25 08:55:57,449 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:57,594 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:57,594 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-07-25 08:55:57,594 INFO L451 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-25 08:55:57,595 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-25 08:55:57,595 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-25 08:55:57,595 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-07-25 08:55:57,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:57,614 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-07-25 08:55:57,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-25 08:55:57,615 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-07-25 08:55:57,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:57,615 INFO L225 Difference]: With dead ends: 21 [2018-07-25 08:55:57,616 INFO L226 Difference]: Without dead ends: 19 [2018-07-25 08:55:57,616 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-25 08:55:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-07-25 08:55:57,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-07-25 08:55:57,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-07-25 08:55:57,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-07-25 08:55:57,622 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-07-25 08:55:57,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:57,622 INFO L472 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-07-25 08:55:57,622 INFO L473 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-25 08:55:57,623 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-07-25 08:55:57,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-07-25 08:55:57,623 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:57,624 INFO L354 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-07-25 08:55:57,624 INFO L415 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:57,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-07-25 08:55:57,624 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:57,777 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:57,777 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-07-25 08:55:57,777 INFO L451 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-25 08:55:57,778 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-25 08:55:57,778 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-25 08:55:57,778 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-07-25 08:55:57,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:57,802 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-07-25 08:55:57,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-25 08:55:57,803 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-07-25 08:55:57,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:57,804 INFO L225 Difference]: With dead ends: 22 [2018-07-25 08:55:57,804 INFO L226 Difference]: Without dead ends: 20 [2018-07-25 08:55:57,804 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-25 08:55:57,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-07-25 08:55:57,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-07-25 08:55:57,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-25 08:55:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-07-25 08:55:57,810 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-07-25 08:55:57,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:57,811 INFO L472 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-07-25 08:55:57,811 INFO L473 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-25 08:55:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-07-25 08:55:57,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-25 08:55:57,812 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:57,812 INFO L354 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-07-25 08:55:57,812 INFO L415 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:57,813 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-07-25 08:55:57,813 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:57,969 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:57,970 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-07-25 08:55:57,970 INFO L451 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-25 08:55:57,970 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-25 08:55:57,971 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-25 08:55:57,971 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-07-25 08:55:57,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:57,997 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-07-25 08:55:57,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-25 08:55:57,998 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-07-25 08:55:57,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:57,998 INFO L225 Difference]: With dead ends: 23 [2018-07-25 08:55:57,998 INFO L226 Difference]: Without dead ends: 21 [2018-07-25 08:55:57,999 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-25 08:55:57,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-25 08:55:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-07-25 08:55:58,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-07-25 08:55:58,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-07-25 08:55:58,004 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-07-25 08:55:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:58,005 INFO L472 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-07-25 08:55:58,005 INFO L473 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-25 08:55:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-07-25 08:55:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-25 08:55:58,006 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:58,006 INFO L354 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-07-25 08:55:58,006 INFO L415 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:58,007 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-07-25 08:55:58,007 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:58,173 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:58,173 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-07-25 08:55:58,173 INFO L451 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-25 08:55:58,174 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-25 08:55:58,174 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-25 08:55:58,175 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-07-25 08:55:58,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:58,201 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-07-25 08:55:58,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-25 08:55:58,202 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-07-25 08:55:58,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:58,203 INFO L225 Difference]: With dead ends: 24 [2018-07-25 08:55:58,203 INFO L226 Difference]: Without dead ends: 22 [2018-07-25 08:55:58,203 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-25 08:55:58,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-07-25 08:55:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-07-25 08:55:58,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-25 08:55:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-07-25 08:55:58,210 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-07-25 08:55:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:58,210 INFO L472 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-07-25 08:55:58,210 INFO L473 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-25 08:55:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-07-25 08:55:58,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-25 08:55:58,211 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:58,211 INFO L354 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-07-25 08:55:58,212 INFO L415 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:58,212 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-07-25 08:55:58,212 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:58,393 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:58,393 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-07-25 08:55:58,394 INFO L451 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-25 08:55:58,394 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-25 08:55:58,394 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-25 08:55:58,395 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-07-25 08:55:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:58,424 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-07-25 08:55:58,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-25 08:55:58,424 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-07-25 08:55:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:58,425 INFO L225 Difference]: With dead ends: 25 [2018-07-25 08:55:58,425 INFO L226 Difference]: Without dead ends: 23 [2018-07-25 08:55:58,426 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-25 08:55:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-07-25 08:55:58,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-07-25 08:55:58,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-25 08:55:58,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-07-25 08:55:58,437 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-07-25 08:55:58,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:58,438 INFO L472 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-07-25 08:55:58,438 INFO L473 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-25 08:55:58,438 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-07-25 08:55:58,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-25 08:55:58,439 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:58,439 INFO L354 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-07-25 08:55:58,439 INFO L415 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:58,440 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-07-25 08:55:58,440 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:58,643 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:58,644 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-07-25 08:55:58,644 INFO L451 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-25 08:55:58,645 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-25 08:55:58,645 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-25 08:55:58,646 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-07-25 08:55:58,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:58,668 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-07-25 08:55:58,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-25 08:55:58,668 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-07-25 08:55:58,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:58,669 INFO L225 Difference]: With dead ends: 26 [2018-07-25 08:55:58,669 INFO L226 Difference]: Without dead ends: 24 [2018-07-25 08:55:58,670 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-25 08:55:58,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-25 08:55:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-07-25 08:55:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-25 08:55:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-07-25 08:55:58,679 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-07-25 08:55:58,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:58,679 INFO L472 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-07-25 08:55:58,680 INFO L473 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-25 08:55:58,680 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-07-25 08:55:58,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-25 08:55:58,680 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:58,681 INFO L354 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-07-25 08:55:58,681 INFO L415 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:58,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-07-25 08:55:58,683 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:58,935 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:58,935 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-07-25 08:55:58,935 INFO L451 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-25 08:55:58,936 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-25 08:55:58,936 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-25 08:55:58,937 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-07-25 08:55:58,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:58,965 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-07-25 08:55:58,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-25 08:55:58,965 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-07-25 08:55:58,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:58,966 INFO L225 Difference]: With dead ends: 27 [2018-07-25 08:55:58,966 INFO L226 Difference]: Without dead ends: 25 [2018-07-25 08:55:58,967 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-25 08:55:58,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-07-25 08:55:58,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-07-25 08:55:58,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-25 08:55:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-07-25 08:55:58,973 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-07-25 08:55:58,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:58,973 INFO L472 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-07-25 08:55:58,974 INFO L473 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-25 08:55:58,974 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-07-25 08:55:58,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-07-25 08:55:58,975 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:58,975 INFO L354 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-07-25 08:55:58,975 INFO L415 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:58,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-07-25 08:55:58,975 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:59,197 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:59,197 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-07-25 08:55:59,197 INFO L451 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-25 08:55:59,198 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-25 08:55:59,198 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-25 08:55:59,199 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-07-25 08:55:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:59,238 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-07-25 08:55:59,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-25 08:55:59,238 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-07-25 08:55:59,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:59,239 INFO L225 Difference]: With dead ends: 28 [2018-07-25 08:55:59,239 INFO L226 Difference]: Without dead ends: 26 [2018-07-25 08:55:59,242 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-25 08:55:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-07-25 08:55:59,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-07-25 08:55:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-25 08:55:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-07-25 08:55:59,252 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-07-25 08:55:59,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:59,253 INFO L472 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-07-25 08:55:59,253 INFO L473 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-25 08:55:59,253 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-07-25 08:55:59,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-25 08:55:59,254 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:59,254 INFO L354 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-07-25 08:55:59,254 INFO L415 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:59,255 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-07-25 08:55:59,255 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:59,593 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:59,593 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-07-25 08:55:59,594 INFO L451 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-25 08:55:59,594 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-25 08:55:59,594 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-25 08:55:59,595 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-07-25 08:55:59,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:59,624 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-07-25 08:55:59,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-25 08:55:59,624 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-07-25 08:55:59,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:59,625 INFO L225 Difference]: With dead ends: 29 [2018-07-25 08:55:59,625 INFO L226 Difference]: Without dead ends: 27 [2018-07-25 08:55:59,626 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-25 08:55:59,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-25 08:55:59,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-07-25 08:55:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-07-25 08:55:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-07-25 08:55:59,633 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-07-25 08:55:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:59,634 INFO L472 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-07-25 08:55:59,634 INFO L473 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-25 08:55:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-07-25 08:55:59,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-25 08:55:59,636 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:59,636 INFO L354 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-07-25 08:55:59,636 INFO L415 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:59,637 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-07-25 08:55:59,637 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:55:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:55:59,874 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:55:59,874 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-07-25 08:55:59,874 INFO L451 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-25 08:55:59,874 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-25 08:55:59,875 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-25 08:55:59,877 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-07-25 08:55:59,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:55:59,907 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-07-25 08:55:59,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-25 08:55:59,908 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-07-25 08:55:59,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:55:59,908 INFO L225 Difference]: With dead ends: 30 [2018-07-25 08:55:59,909 INFO L226 Difference]: Without dead ends: 28 [2018-07-25 08:55:59,910 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-25 08:55:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-07-25 08:55:59,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-07-25 08:55:59,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-25 08:55:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-07-25 08:55:59,923 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-07-25 08:55:59,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:55:59,924 INFO L472 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-07-25 08:55:59,924 INFO L473 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-25 08:55:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-07-25 08:55:59,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-25 08:55:59,924 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:55:59,925 INFO L354 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-07-25 08:55:59,925 INFO L415 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:55:59,925 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-07-25 08:55:59,925 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:55:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:00,160 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:00,160 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-07-25 08:56:00,160 INFO L451 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-25 08:56:00,161 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-25 08:56:00,161 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-25 08:56:00,161 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-07-25 08:56:00,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:00,194 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-07-25 08:56:00,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-25 08:56:00,194 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-07-25 08:56:00,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:00,195 INFO L225 Difference]: With dead ends: 31 [2018-07-25 08:56:00,195 INFO L226 Difference]: Without dead ends: 29 [2018-07-25 08:56:00,196 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-25 08:56:00,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-07-25 08:56:00,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-07-25 08:56:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-25 08:56:00,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-07-25 08:56:00,202 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-07-25 08:56:00,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:00,202 INFO L472 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-07-25 08:56:00,202 INFO L473 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-25 08:56:00,203 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-07-25 08:56:00,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-25 08:56:00,203 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:00,203 INFO L354 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-07-25 08:56:00,204 INFO L415 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:00,204 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-07-25 08:56:00,204 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:00,456 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:00,456 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-07-25 08:56:00,456 INFO L451 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-25 08:56:00,457 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-25 08:56:00,457 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-25 08:56:00,458 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-07-25 08:56:00,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:00,490 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-07-25 08:56:00,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-25 08:56:00,491 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-07-25 08:56:00,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:00,491 INFO L225 Difference]: With dead ends: 32 [2018-07-25 08:56:00,491 INFO L226 Difference]: Without dead ends: 30 [2018-07-25 08:56:00,492 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-25 08:56:00,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-25 08:56:00,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-07-25 08:56:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-07-25 08:56:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-07-25 08:56:00,498 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-07-25 08:56:00,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:00,499 INFO L472 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-07-25 08:56:00,499 INFO L473 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-25 08:56:00,499 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-07-25 08:56:00,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-07-25 08:56:00,500 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:00,500 INFO L354 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-07-25 08:56:00,500 INFO L415 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:00,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-07-25 08:56:00,500 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:00,753 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:00,753 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-07-25 08:56:00,753 INFO L451 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-25 08:56:00,753 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-25 08:56:00,754 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-25 08:56:00,754 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-07-25 08:56:00,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:00,778 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-07-25 08:56:00,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-25 08:56:00,778 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-07-25 08:56:00,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:00,779 INFO L225 Difference]: With dead ends: 33 [2018-07-25 08:56:00,779 INFO L226 Difference]: Without dead ends: 31 [2018-07-25 08:56:00,779 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-25 08:56:00,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-07-25 08:56:00,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-07-25 08:56:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-07-25 08:56:00,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-07-25 08:56:00,785 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-07-25 08:56:00,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:00,786 INFO L472 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-07-25 08:56:00,786 INFO L473 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-25 08:56:00,786 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-07-25 08:56:00,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-25 08:56:00,786 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:00,787 INFO L354 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-07-25 08:56:00,787 INFO L415 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:00,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-07-25 08:56:00,787 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:01,037 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:01,037 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-07-25 08:56:01,037 INFO L451 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-25 08:56:01,038 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-25 08:56:01,038 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-25 08:56:01,038 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-07-25 08:56:01,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:01,070 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-07-25 08:56:01,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-25 08:56:01,071 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-07-25 08:56:01,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:01,071 INFO L225 Difference]: With dead ends: 34 [2018-07-25 08:56:01,071 INFO L226 Difference]: Without dead ends: 32 [2018-07-25 08:56:01,072 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-25 08:56:01,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-07-25 08:56:01,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-07-25 08:56:01,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-25 08:56:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-07-25 08:56:01,085 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-07-25 08:56:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:01,088 INFO L472 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-07-25 08:56:01,088 INFO L473 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-25 08:56:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-07-25 08:56:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-25 08:56:01,088 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:01,089 INFO L354 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-07-25 08:56:01,089 INFO L415 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:01,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-07-25 08:56:01,089 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:01,353 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:01,353 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-07-25 08:56:01,353 INFO L451 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-25 08:56:01,354 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-25 08:56:01,354 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-25 08:56:01,355 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-07-25 08:56:01,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:01,381 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-07-25 08:56:01,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-25 08:56:01,381 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-07-25 08:56:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:01,382 INFO L225 Difference]: With dead ends: 35 [2018-07-25 08:56:01,382 INFO L226 Difference]: Without dead ends: 33 [2018-07-25 08:56:01,383 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-25 08:56:01,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-25 08:56:01,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-07-25 08:56:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-07-25 08:56:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-07-25 08:56:01,393 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-07-25 08:56:01,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:01,393 INFO L472 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-07-25 08:56:01,393 INFO L473 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-25 08:56:01,393 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-07-25 08:56:01,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-25 08:56:01,394 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:01,394 INFO L354 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-07-25 08:56:01,395 INFO L415 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:01,395 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-07-25 08:56:01,395 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:01,685 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:01,686 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-07-25 08:56:01,686 INFO L451 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-25 08:56:01,686 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-25 08:56:01,687 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-25 08:56:01,687 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-07-25 08:56:01,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:01,721 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-07-25 08:56:01,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-25 08:56:01,721 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-07-25 08:56:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:01,722 INFO L225 Difference]: With dead ends: 36 [2018-07-25 08:56:01,722 INFO L226 Difference]: Without dead ends: 34 [2018-07-25 08:56:01,723 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-25 08:56:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-07-25 08:56:01,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-07-25 08:56:01,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-07-25 08:56:01,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-07-25 08:56:01,733 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-07-25 08:56:01,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:01,733 INFO L472 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-07-25 08:56:01,733 INFO L473 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-25 08:56:01,734 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-07-25 08:56:01,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-07-25 08:56:01,734 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:01,734 INFO L354 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-07-25 08:56:01,735 INFO L415 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:01,735 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-07-25 08:56:01,735 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:02,022 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:02,022 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-07-25 08:56:02,022 INFO L451 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-25 08:56:02,023 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-25 08:56:02,023 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-25 08:56:02,024 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-07-25 08:56:02,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:02,059 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-07-25 08:56:02,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-25 08:56:02,059 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-07-25 08:56:02,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:02,060 INFO L225 Difference]: With dead ends: 37 [2018-07-25 08:56:02,061 INFO L226 Difference]: Without dead ends: 35 [2018-07-25 08:56:02,062 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-25 08:56:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-07-25 08:56:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-07-25 08:56:02,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-25 08:56:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-07-25 08:56:02,068 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-07-25 08:56:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:02,069 INFO L472 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-07-25 08:56:02,069 INFO L473 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-25 08:56:02,069 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-07-25 08:56:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-25 08:56:02,069 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:02,069 INFO L354 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-07-25 08:56:02,070 INFO L415 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:02,070 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-07-25 08:56:02,070 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:02,381 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:02,381 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-07-25 08:56:02,381 INFO L451 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-25 08:56:02,382 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-25 08:56:02,382 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-25 08:56:02,383 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-07-25 08:56:02,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:02,414 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-07-25 08:56:02,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-25 08:56:02,414 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-07-25 08:56:02,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:02,415 INFO L225 Difference]: With dead ends: 38 [2018-07-25 08:56:02,415 INFO L226 Difference]: Without dead ends: 36 [2018-07-25 08:56:02,416 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-25 08:56:02,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-25 08:56:02,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-07-25 08:56:02,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-25 08:56:02,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-07-25 08:56:02,423 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-07-25 08:56:02,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:02,423 INFO L472 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-07-25 08:56:02,423 INFO L473 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-25 08:56:02,424 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-07-25 08:56:02,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-25 08:56:02,424 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:02,424 INFO L354 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-07-25 08:56:02,424 INFO L415 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:02,425 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-07-25 08:56:02,425 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:02,817 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:02,817 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-07-25 08:56:02,817 INFO L451 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-25 08:56:02,818 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-25 08:56:02,818 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-25 08:56:02,822 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-07-25 08:56:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:02,856 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-07-25 08:56:02,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-25 08:56:02,856 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-07-25 08:56:02,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:02,857 INFO L225 Difference]: With dead ends: 39 [2018-07-25 08:56:02,857 INFO L226 Difference]: Without dead ends: 37 [2018-07-25 08:56:02,858 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-25 08:56:02,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-07-25 08:56:02,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-07-25 08:56:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-07-25 08:56:02,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-07-25 08:56:02,866 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-07-25 08:56:02,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:02,866 INFO L472 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-07-25 08:56:02,866 INFO L473 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-25 08:56:02,866 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-07-25 08:56:02,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-07-25 08:56:02,866 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:02,867 INFO L354 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-07-25 08:56:02,867 INFO L415 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:02,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-07-25 08:56:02,868 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:03,168 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:03,169 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-07-25 08:56:03,169 INFO L451 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-25 08:56:03,169 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-25 08:56:03,170 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-25 08:56:03,170 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-07-25 08:56:03,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:03,199 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-07-25 08:56:03,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-25 08:56:03,199 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-07-25 08:56:03,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:03,200 INFO L225 Difference]: With dead ends: 40 [2018-07-25 08:56:03,200 INFO L226 Difference]: Without dead ends: 38 [2018-07-25 08:56:03,201 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-25 08:56:03,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-07-25 08:56:03,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-07-25 08:56:03,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-07-25 08:56:03,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-07-25 08:56:03,208 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-07-25 08:56:03,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:03,208 INFO L472 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-07-25 08:56:03,208 INFO L473 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-25 08:56:03,208 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-07-25 08:56:03,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-25 08:56:03,209 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:03,209 INFO L354 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-07-25 08:56:03,209 INFO L415 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:03,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-07-25 08:56:03,210 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:03,503 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:03,503 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-07-25 08:56:03,504 INFO L451 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-25 08:56:03,504 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-25 08:56:03,504 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-25 08:56:03,505 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-07-25 08:56:03,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:03,530 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-07-25 08:56:03,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-25 08:56:03,531 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-07-25 08:56:03,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:03,531 INFO L225 Difference]: With dead ends: 41 [2018-07-25 08:56:03,532 INFO L226 Difference]: Without dead ends: 39 [2018-07-25 08:56:03,532 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-25 08:56:03,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-25 08:56:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-07-25 08:56:03,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-07-25 08:56:03,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-07-25 08:56:03,540 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-07-25 08:56:03,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:03,540 INFO L472 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-07-25 08:56:03,540 INFO L473 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-25 08:56:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-07-25 08:56:03,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-25 08:56:03,545 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:03,545 INFO L354 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-07-25 08:56:03,545 INFO L415 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:03,546 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-07-25 08:56:03,546 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:03,854 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:03,855 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-07-25 08:56:03,855 INFO L451 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-25 08:56:03,855 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-25 08:56:03,856 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-25 08:56:03,856 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-07-25 08:56:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:03,885 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-07-25 08:56:03,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-25 08:56:03,886 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-07-25 08:56:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:03,886 INFO L225 Difference]: With dead ends: 42 [2018-07-25 08:56:03,887 INFO L226 Difference]: Without dead ends: 40 [2018-07-25 08:56:03,888 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-25 08:56:03,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-07-25 08:56:03,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-07-25 08:56:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-25 08:56:03,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-07-25 08:56:03,897 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-07-25 08:56:03,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:03,897 INFO L472 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-07-25 08:56:03,897 INFO L473 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-25 08:56:03,897 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-07-25 08:56:03,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-25 08:56:03,898 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:03,898 INFO L354 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-07-25 08:56:03,898 INFO L415 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:03,898 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-07-25 08:56:03,899 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:04,222 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:04,222 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-07-25 08:56:04,222 INFO L451 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-25 08:56:04,222 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-25 08:56:04,223 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-25 08:56:04,224 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-07-25 08:56:04,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:04,265 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-07-25 08:56:04,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-25 08:56:04,265 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-07-25 08:56:04,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:04,266 INFO L225 Difference]: With dead ends: 43 [2018-07-25 08:56:04,266 INFO L226 Difference]: Without dead ends: 41 [2018-07-25 08:56:04,267 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-25 08:56:04,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-07-25 08:56:04,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-07-25 08:56:04,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-07-25 08:56:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-07-25 08:56:04,273 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-07-25 08:56:04,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:04,273 INFO L472 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-07-25 08:56:04,273 INFO L473 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-25 08:56:04,274 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-07-25 08:56:04,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-25 08:56:04,274 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:04,274 INFO L354 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-07-25 08:56:04,276 INFO L415 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:04,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-07-25 08:56:04,276 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:04,642 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:04,642 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-07-25 08:56:04,642 INFO L451 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-25 08:56:04,643 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-25 08:56:04,643 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-25 08:56:04,644 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-07-25 08:56:04,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:04,689 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-07-25 08:56:04,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-25 08:56:04,689 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-07-25 08:56:04,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:04,690 INFO L225 Difference]: With dead ends: 44 [2018-07-25 08:56:04,690 INFO L226 Difference]: Without dead ends: 42 [2018-07-25 08:56:04,691 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-25 08:56:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-25 08:56:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-07-25 08:56:04,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-07-25 08:56:04,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-07-25 08:56:04,698 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-07-25 08:56:04,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:04,699 INFO L472 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-07-25 08:56:04,699 INFO L473 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-25 08:56:04,699 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-07-25 08:56:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-07-25 08:56:04,699 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:04,699 INFO L354 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-07-25 08:56:04,700 INFO L415 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:04,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-07-25 08:56:04,700 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:05,035 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:05,035 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-07-25 08:56:05,035 INFO L451 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-25 08:56:05,036 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-25 08:56:05,036 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-25 08:56:05,037 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-07-25 08:56:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:05,080 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-07-25 08:56:05,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-25 08:56:05,080 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-07-25 08:56:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:05,080 INFO L225 Difference]: With dead ends: 45 [2018-07-25 08:56:05,081 INFO L226 Difference]: Without dead ends: 43 [2018-07-25 08:56:05,082 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-25 08:56:05,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-07-25 08:56:05,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-07-25 08:56:05,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-07-25 08:56:05,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-07-25 08:56:05,088 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-07-25 08:56:05,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:05,088 INFO L472 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-07-25 08:56:05,089 INFO L473 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-25 08:56:05,089 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-07-25 08:56:05,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-07-25 08:56:05,089 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:05,089 INFO L354 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-07-25 08:56:05,090 INFO L415 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:05,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-07-25 08:56:05,090 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:05,458 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:05,458 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-07-25 08:56:05,459 INFO L451 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-25 08:56:05,459 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-25 08:56:05,460 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-25 08:56:05,460 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-07-25 08:56:05,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:05,498 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-07-25 08:56:05,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-25 08:56:05,499 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-07-25 08:56:05,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:05,499 INFO L225 Difference]: With dead ends: 46 [2018-07-25 08:56:05,499 INFO L226 Difference]: Without dead ends: 44 [2018-07-25 08:56:05,501 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-25 08:56:05,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-07-25 08:56:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-07-25 08:56:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-25 08:56:05,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-07-25 08:56:05,508 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-07-25 08:56:05,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:05,508 INFO L472 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-07-25 08:56:05,509 INFO L473 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-25 08:56:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-07-25 08:56:05,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-25 08:56:05,509 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:05,509 INFO L354 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-07-25 08:56:05,510 INFO L415 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:05,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-07-25 08:56:05,510 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:05,918 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:05,918 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-07-25 08:56:05,919 INFO L451 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-25 08:56:05,919 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-25 08:56:05,920 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-25 08:56:05,921 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-07-25 08:56:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:06,015 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-07-25 08:56:06,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-25 08:56:06,015 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-07-25 08:56:06,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:06,016 INFO L225 Difference]: With dead ends: 47 [2018-07-25 08:56:06,016 INFO L226 Difference]: Without dead ends: 45 [2018-07-25 08:56:06,017 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-25 08:56:06,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-07-25 08:56:06,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-07-25 08:56:06,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-07-25 08:56:06,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-07-25 08:56:06,024 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-07-25 08:56:06,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:06,024 INFO L472 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-07-25 08:56:06,024 INFO L473 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-25 08:56:06,024 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-07-25 08:56:06,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-25 08:56:06,025 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:06,025 INFO L354 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-07-25 08:56:06,025 INFO L415 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:06,025 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-07-25 08:56:06,026 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:06,373 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:06,373 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-07-25 08:56:06,373 INFO L451 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-25 08:56:06,374 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-25 08:56:06,375 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-25 08:56:06,375 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-07-25 08:56:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:06,416 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-07-25 08:56:06,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-25 08:56:06,416 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-07-25 08:56:06,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:06,417 INFO L225 Difference]: With dead ends: 48 [2018-07-25 08:56:06,417 INFO L226 Difference]: Without dead ends: 46 [2018-07-25 08:56:06,418 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-25 08:56:06,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-07-25 08:56:06,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-07-25 08:56:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-07-25 08:56:06,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-07-25 08:56:06,426 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-07-25 08:56:06,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:06,427 INFO L472 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-07-25 08:56:06,427 INFO L473 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-25 08:56:06,427 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-07-25 08:56:06,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-07-25 08:56:06,427 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:06,427 INFO L354 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-07-25 08:56:06,428 INFO L415 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:06,428 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-07-25 08:56:06,428 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:06,777 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:06,777 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-07-25 08:56:06,777 INFO L451 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-25 08:56:06,778 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-25 08:56:06,779 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-25 08:56:06,779 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-07-25 08:56:06,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:06,813 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-07-25 08:56:06,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-25 08:56:06,813 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-07-25 08:56:06,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:06,814 INFO L225 Difference]: With dead ends: 49 [2018-07-25 08:56:06,814 INFO L226 Difference]: Without dead ends: 47 [2018-07-25 08:56:06,816 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-25 08:56:06,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-07-25 08:56:06,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-07-25 08:56:06,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-25 08:56:06,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-07-25 08:56:06,826 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-07-25 08:56:06,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:06,827 INFO L472 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-07-25 08:56:06,827 INFO L473 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-25 08:56:06,827 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-07-25 08:56:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-25 08:56:06,827 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:06,828 INFO L354 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-07-25 08:56:06,828 INFO L415 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:06,828 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-07-25 08:56:06,833 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:07,220 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:07,220 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-07-25 08:56:07,220 INFO L451 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-25 08:56:07,221 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-25 08:56:07,223 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-25 08:56:07,224 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-07-25 08:56:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:07,278 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-07-25 08:56:07,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-25 08:56:07,278 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-07-25 08:56:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:07,279 INFO L225 Difference]: With dead ends: 50 [2018-07-25 08:56:07,279 INFO L226 Difference]: Without dead ends: 48 [2018-07-25 08:56:07,280 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-25 08:56:07,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-07-25 08:56:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-07-25 08:56:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-07-25 08:56:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-07-25 08:56:07,288 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-07-25 08:56:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:07,288 INFO L472 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-07-25 08:56:07,288 INFO L473 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-25 08:56:07,288 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-07-25 08:56:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-07-25 08:56:07,289 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:07,289 INFO L354 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-07-25 08:56:07,289 INFO L415 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:07,289 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-07-25 08:56:07,289 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:07,698 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:07,698 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-07-25 08:56:07,698 INFO L451 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-25 08:56:07,699 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-25 08:56:07,699 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-25 08:56:07,700 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-07-25 08:56:07,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:07,749 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-07-25 08:56:07,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-25 08:56:07,749 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-07-25 08:56:07,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:07,750 INFO L225 Difference]: With dead ends: 51 [2018-07-25 08:56:07,750 INFO L226 Difference]: Without dead ends: 49 [2018-07-25 08:56:07,751 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-25 08:56:07,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-07-25 08:56:07,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-07-25 08:56:07,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-07-25 08:56:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-07-25 08:56:07,757 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-07-25 08:56:07,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:07,758 INFO L472 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-07-25 08:56:07,758 INFO L473 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-25 08:56:07,758 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-07-25 08:56:07,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-07-25 08:56:07,758 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:07,758 INFO L354 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-07-25 08:56:07,759 INFO L415 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:07,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-07-25 08:56:07,759 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:08,160 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:08,160 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-07-25 08:56:08,161 INFO L451 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-25 08:56:08,161 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-25 08:56:08,162 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-25 08:56:08,162 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-07-25 08:56:08,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:08,201 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-07-25 08:56:08,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-25 08:56:08,202 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-07-25 08:56:08,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:08,202 INFO L225 Difference]: With dead ends: 52 [2018-07-25 08:56:08,203 INFO L226 Difference]: Without dead ends: 50 [2018-07-25 08:56:08,203 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-25 08:56:08,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-07-25 08:56:08,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-07-25 08:56:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-07-25 08:56:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-07-25 08:56:08,211 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-07-25 08:56:08,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:08,211 INFO L472 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-07-25 08:56:08,211 INFO L473 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-25 08:56:08,211 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-07-25 08:56:08,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-07-25 08:56:08,212 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:08,212 INFO L354 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-07-25 08:56:08,212 INFO L415 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:08,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-07-25 08:56:08,212 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:08,616 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:08,616 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-07-25 08:56:08,616 INFO L451 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-25 08:56:08,617 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-25 08:56:08,618 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-25 08:56:08,618 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-07-25 08:56:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:08,662 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-07-25 08:56:08,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-25 08:56:08,662 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-07-25 08:56:08,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:08,663 INFO L225 Difference]: With dead ends: 53 [2018-07-25 08:56:08,663 INFO L226 Difference]: Without dead ends: 51 [2018-07-25 08:56:08,664 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-25 08:56:08,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-07-25 08:56:08,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-07-25 08:56:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-07-25 08:56:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-07-25 08:56:08,672 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-07-25 08:56:08,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:08,673 INFO L472 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-07-25 08:56:08,673 INFO L473 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-25 08:56:08,673 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-07-25 08:56:08,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-25 08:56:08,673 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:08,673 INFO L354 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-07-25 08:56:08,674 INFO L415 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:08,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-07-25 08:56:08,674 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:09,153 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:09,154 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-07-25 08:56:09,154 INFO L451 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-25 08:56:09,155 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-25 08:56:09,155 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-25 08:56:09,156 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-07-25 08:56:09,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:09,199 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-07-25 08:56:09,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-25 08:56:09,199 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-07-25 08:56:09,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:09,200 INFO L225 Difference]: With dead ends: 54 [2018-07-25 08:56:09,200 INFO L226 Difference]: Without dead ends: 52 [2018-07-25 08:56:09,201 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-25 08:56:09,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-07-25 08:56:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-07-25 08:56:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-07-25 08:56:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-07-25 08:56:09,214 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-07-25 08:56:09,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:09,214 INFO L472 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-07-25 08:56:09,214 INFO L473 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-25 08:56:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-07-25 08:56:09,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-07-25 08:56:09,217 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:09,217 INFO L354 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-07-25 08:56:09,218 INFO L415 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:09,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-07-25 08:56:09,218 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:09,664 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:09,664 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-07-25 08:56:09,664 INFO L451 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-25 08:56:09,665 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-25 08:56:09,665 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-25 08:56:09,665 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-07-25 08:56:09,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:09,714 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-07-25 08:56:09,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-25 08:56:09,714 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-07-25 08:56:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:09,715 INFO L225 Difference]: With dead ends: 55 [2018-07-25 08:56:09,715 INFO L226 Difference]: Without dead ends: 53 [2018-07-25 08:56:09,716 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-25 08:56:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-07-25 08:56:09,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-07-25 08:56:09,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-25 08:56:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-07-25 08:56:09,723 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-07-25 08:56:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:09,723 INFO L472 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-07-25 08:56:09,724 INFO L473 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-25 08:56:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-07-25 08:56:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-25 08:56:09,724 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:09,724 INFO L354 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-07-25 08:56:09,725 INFO L415 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:09,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-07-25 08:56:09,725 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:10,104 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:10,104 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-07-25 08:56:10,104 INFO L451 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-25 08:56:10,105 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-25 08:56:10,105 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-25 08:56:10,106 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-07-25 08:56:10,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:10,157 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-07-25 08:56:10,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-25 08:56:10,157 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-07-25 08:56:10,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:10,158 INFO L225 Difference]: With dead ends: 56 [2018-07-25 08:56:10,158 INFO L226 Difference]: Without dead ends: 54 [2018-07-25 08:56:10,159 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-25 08:56:10,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-07-25 08:56:10,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-07-25 08:56:10,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-07-25 08:56:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-07-25 08:56:10,167 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-07-25 08:56:10,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:10,168 INFO L472 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-07-25 08:56:10,168 INFO L473 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-25 08:56:10,168 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-07-25 08:56:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-07-25 08:56:10,168 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:10,168 INFO L354 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-07-25 08:56:10,169 INFO L415 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:10,169 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-07-25 08:56:10,169 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:10,579 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:10,580 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-07-25 08:56:10,580 INFO L451 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-25 08:56:10,580 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-25 08:56:10,581 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-25 08:56:10,581 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-07-25 08:56:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:10,639 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-07-25 08:56:10,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-25 08:56:10,639 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-07-25 08:56:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:10,640 INFO L225 Difference]: With dead ends: 57 [2018-07-25 08:56:10,640 INFO L226 Difference]: Without dead ends: 55 [2018-07-25 08:56:10,641 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-25 08:56:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-07-25 08:56:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-07-25 08:56:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-07-25 08:56:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-07-25 08:56:10,650 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-07-25 08:56:10,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:10,650 INFO L472 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-07-25 08:56:10,650 INFO L473 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-25 08:56:10,651 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-07-25 08:56:10,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-07-25 08:56:10,651 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:10,651 INFO L354 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-07-25 08:56:10,652 INFO L415 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:10,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-07-25 08:56:10,652 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:11,086 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:11,086 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-07-25 08:56:11,087 INFO L451 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-25 08:56:11,087 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-25 08:56:11,088 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-25 08:56:11,088 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-07-25 08:56:11,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:11,129 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-07-25 08:56:11,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-25 08:56:11,129 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-07-25 08:56:11,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:11,130 INFO L225 Difference]: With dead ends: 58 [2018-07-25 08:56:11,130 INFO L226 Difference]: Without dead ends: 56 [2018-07-25 08:56:11,131 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-25 08:56:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-07-25 08:56:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-07-25 08:56:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-07-25 08:56:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-07-25 08:56:11,140 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-07-25 08:56:11,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:11,140 INFO L472 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-07-25 08:56:11,141 INFO L473 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-25 08:56:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-07-25 08:56:11,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-25 08:56:11,141 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:11,141 INFO L354 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-07-25 08:56:11,142 INFO L415 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:11,142 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-07-25 08:56:11,142 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:11,607 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:11,607 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-07-25 08:56:11,607 INFO L451 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-25 08:56:11,608 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-25 08:56:11,608 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-25 08:56:11,609 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-07-25 08:56:11,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:11,664 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-07-25 08:56:11,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-25 08:56:11,665 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-07-25 08:56:11,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:11,665 INFO L225 Difference]: With dead ends: 59 [2018-07-25 08:56:11,665 INFO L226 Difference]: Without dead ends: 57 [2018-07-25 08:56:11,666 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-25 08:56:11,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-25 08:56:11,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-07-25 08:56:11,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-07-25 08:56:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-07-25 08:56:11,675 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-07-25 08:56:11,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:11,675 INFO L472 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-07-25 08:56:11,675 INFO L473 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-25 08:56:11,676 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-07-25 08:56:11,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-25 08:56:11,676 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:11,676 INFO L354 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-07-25 08:56:11,677 INFO L415 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:11,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-07-25 08:56:11,677 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:12,202 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:12,203 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-07-25 08:56:12,203 INFO L451 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-25 08:56:12,207 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-25 08:56:12,207 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-25 08:56:12,208 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-07-25 08:56:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:12,282 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-07-25 08:56:12,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-25 08:56:12,283 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-07-25 08:56:12,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:12,284 INFO L225 Difference]: With dead ends: 60 [2018-07-25 08:56:12,284 INFO L226 Difference]: Without dead ends: 58 [2018-07-25 08:56:12,285 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-25 08:56:12,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-07-25 08:56:12,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-07-25 08:56:12,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-07-25 08:56:12,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-07-25 08:56:12,294 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-07-25 08:56:12,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:12,294 INFO L472 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-07-25 08:56:12,295 INFO L473 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-25 08:56:12,295 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-07-25 08:56:12,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-07-25 08:56:12,295 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:12,295 INFO L354 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-07-25 08:56:12,296 INFO L415 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:12,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-07-25 08:56:12,296 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:12,752 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:12,752 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-07-25 08:56:12,752 INFO L451 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-25 08:56:12,753 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-25 08:56:12,754 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-25 08:56:12,754 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-07-25 08:56:12,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:12,813 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-07-25 08:56:12,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-25 08:56:12,813 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-07-25 08:56:12,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:12,814 INFO L225 Difference]: With dead ends: 61 [2018-07-25 08:56:12,814 INFO L226 Difference]: Without dead ends: 59 [2018-07-25 08:56:12,816 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-25 08:56:12,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-07-25 08:56:12,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-07-25 08:56:12,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-07-25 08:56:12,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-07-25 08:56:12,825 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-07-25 08:56:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:12,825 INFO L472 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-07-25 08:56:12,825 INFO L473 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-25 08:56:12,826 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-07-25 08:56:12,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-25 08:56:12,826 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:12,826 INFO L354 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-07-25 08:56:12,827 INFO L415 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:12,827 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-07-25 08:56:12,827 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:13,264 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:13,264 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-07-25 08:56:13,265 INFO L451 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-25 08:56:13,265 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-25 08:56:13,266 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-25 08:56:13,266 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-07-25 08:56:13,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:13,313 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-07-25 08:56:13,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-25 08:56:13,314 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-07-25 08:56:13,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:13,314 INFO L225 Difference]: With dead ends: 62 [2018-07-25 08:56:13,315 INFO L226 Difference]: Without dead ends: 60 [2018-07-25 08:56:13,316 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-25 08:56:13,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-07-25 08:56:13,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-07-25 08:56:13,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-07-25 08:56:13,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-07-25 08:56:13,324 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-07-25 08:56:13,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:13,325 INFO L472 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-07-25 08:56:13,325 INFO L473 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-25 08:56:13,325 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-07-25 08:56:13,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-07-25 08:56:13,326 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:13,326 INFO L354 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-07-25 08:56:13,326 INFO L415 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:13,326 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-07-25 08:56:13,326 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:13,778 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:13,778 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-07-25 08:56:13,778 INFO L451 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-25 08:56:13,779 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-25 08:56:13,779 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-25 08:56:13,780 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-07-25 08:56:13,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:13,841 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-07-25 08:56:13,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-25 08:56:13,842 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-07-25 08:56:13,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:13,842 INFO L225 Difference]: With dead ends: 63 [2018-07-25 08:56:13,842 INFO L226 Difference]: Without dead ends: 61 [2018-07-25 08:56:13,843 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-25 08:56:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-07-25 08:56:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-07-25 08:56:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-07-25 08:56:13,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-07-25 08:56:13,851 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-07-25 08:56:13,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:13,851 INFO L472 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-07-25 08:56:13,852 INFO L473 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-25 08:56:13,852 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-07-25 08:56:13,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-07-25 08:56:13,852 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:13,852 INFO L354 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-07-25 08:56:13,853 INFO L415 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:13,853 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-07-25 08:56:13,853 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:14,314 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:14,314 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-07-25 08:56:14,314 INFO L451 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-25 08:56:14,315 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-25 08:56:14,316 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-25 08:56:14,316 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-07-25 08:56:14,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:14,385 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-07-25 08:56:14,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-25 08:56:14,385 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-07-25 08:56:14,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:14,386 INFO L225 Difference]: With dead ends: 64 [2018-07-25 08:56:14,386 INFO L226 Difference]: Without dead ends: 62 [2018-07-25 08:56:14,387 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-25 08:56:14,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-07-25 08:56:14,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-07-25 08:56:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-07-25 08:56:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-07-25 08:56:14,395 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-07-25 08:56:14,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:14,396 INFO L472 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-07-25 08:56:14,396 INFO L473 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-25 08:56:14,396 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-07-25 08:56:14,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-07-25 08:56:14,396 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:14,397 INFO L354 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-07-25 08:56:14,397 INFO L415 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-07-25 08:56:14,397 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:14,900 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:14,901 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-07-25 08:56:14,901 INFO L451 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-25 08:56:14,902 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-25 08:56:14,902 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-25 08:56:14,903 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-07-25 08:56:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:14,970 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-07-25 08:56:14,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-25 08:56:14,971 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-07-25 08:56:14,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:14,971 INFO L225 Difference]: With dead ends: 65 [2018-07-25 08:56:14,971 INFO L226 Difference]: Without dead ends: 63 [2018-07-25 08:56:14,972 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-25 08:56:14,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-07-25 08:56:14,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-07-25 08:56:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-07-25 08:56:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-07-25 08:56:14,982 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-07-25 08:56:14,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:14,982 INFO L472 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-07-25 08:56:14,982 INFO L473 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-25 08:56:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-07-25 08:56:14,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-25 08:56:14,983 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:14,983 INFO L354 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-07-25 08:56:14,983 INFO L415 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:14,984 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-07-25 08:56:14,984 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:15,649 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:15,649 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-07-25 08:56:15,649 INFO L451 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-25 08:56:15,650 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-25 08:56:15,650 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-25 08:56:15,651 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-07-25 08:56:15,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:15,716 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-07-25 08:56:15,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-25 08:56:15,716 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-07-25 08:56:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:15,717 INFO L225 Difference]: With dead ends: 66 [2018-07-25 08:56:15,717 INFO L226 Difference]: Without dead ends: 64 [2018-07-25 08:56:15,718 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-25 08:56:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-07-25 08:56:15,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-07-25 08:56:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-07-25 08:56:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-07-25 08:56:15,729 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-07-25 08:56:15,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:15,730 INFO L472 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-07-25 08:56:15,730 INFO L473 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-25 08:56:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-07-25 08:56:15,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-07-25 08:56:15,731 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:15,731 INFO L354 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-07-25 08:56:15,731 INFO L415 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:15,731 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-07-25 08:56:15,732 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:16,204 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:16,204 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-07-25 08:56:16,205 INFO L451 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-25 08:56:16,205 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-25 08:56:16,206 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-25 08:56:16,207 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-07-25 08:56:16,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:16,271 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-07-25 08:56:16,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-25 08:56:16,271 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-07-25 08:56:16,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:16,272 INFO L225 Difference]: With dead ends: 67 [2018-07-25 08:56:16,272 INFO L226 Difference]: Without dead ends: 65 [2018-07-25 08:56:16,273 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-25 08:56:16,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-07-25 08:56:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-07-25 08:56:16,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-07-25 08:56:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-07-25 08:56:16,282 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-07-25 08:56:16,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:16,282 INFO L472 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-07-25 08:56:16,282 INFO L473 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-25 08:56:16,282 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-07-25 08:56:16,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-25 08:56:16,283 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:16,283 INFO L354 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-07-25 08:56:16,283 INFO L415 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:16,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-07-25 08:56:16,284 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:16,766 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:16,766 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-07-25 08:56:16,767 INFO L451 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-25 08:56:16,768 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-25 08:56:16,768 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-25 08:56:16,768 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-07-25 08:56:16,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:16,820 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-07-25 08:56:16,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-25 08:56:16,820 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-07-25 08:56:16,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:16,821 INFO L225 Difference]: With dead ends: 68 [2018-07-25 08:56:16,821 INFO L226 Difference]: Without dead ends: 66 [2018-07-25 08:56:16,822 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-25 08:56:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-07-25 08:56:16,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-07-25 08:56:16,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-07-25 08:56:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-07-25 08:56:16,830 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-07-25 08:56:16,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:16,830 INFO L472 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-07-25 08:56:16,830 INFO L473 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-25 08:56:16,830 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-07-25 08:56:16,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-07-25 08:56:16,831 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:16,831 INFO L354 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-07-25 08:56:16,831 INFO L415 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:16,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-07-25 08:56:16,832 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:17,296 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:17,296 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-07-25 08:56:17,296 INFO L451 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-25 08:56:17,297 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-25 08:56:17,298 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-25 08:56:17,298 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-07-25 08:56:17,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:17,366 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-07-25 08:56:17,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-25 08:56:17,367 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-07-25 08:56:17,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:17,367 INFO L225 Difference]: With dead ends: 69 [2018-07-25 08:56:17,367 INFO L226 Difference]: Without dead ends: 67 [2018-07-25 08:56:17,369 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-25 08:56:17,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-07-25 08:56:17,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-07-25 08:56:17,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-07-25 08:56:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-07-25 08:56:17,377 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-07-25 08:56:17,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:17,377 INFO L472 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-07-25 08:56:17,377 INFO L473 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-25 08:56:17,377 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-07-25 08:56:17,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-07-25 08:56:17,378 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:17,378 INFO L354 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-07-25 08:56:17,378 INFO L415 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:17,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-07-25 08:56:17,378 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:17,900 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:17,900 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-07-25 08:56:17,901 INFO L451 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-25 08:56:17,901 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-25 08:56:17,902 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-25 08:56:17,903 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-07-25 08:56:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:17,956 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-07-25 08:56:17,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-25 08:56:17,956 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-07-25 08:56:17,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:17,957 INFO L225 Difference]: With dead ends: 70 [2018-07-25 08:56:17,957 INFO L226 Difference]: Without dead ends: 68 [2018-07-25 08:56:17,957 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-25 08:56:17,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-07-25 08:56:17,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-07-25 08:56:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-07-25 08:56:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-07-25 08:56:17,966 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-07-25 08:56:17,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:17,966 INFO L472 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-07-25 08:56:17,966 INFO L473 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-25 08:56:17,966 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-07-25 08:56:17,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-07-25 08:56:17,967 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:17,967 INFO L354 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-07-25 08:56:17,967 INFO L415 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:17,967 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-07-25 08:56:17,968 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:18,567 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:18,567 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-07-25 08:56:18,568 INFO L451 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-25 08:56:18,568 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-25 08:56:18,568 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-25 08:56:18,569 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-07-25 08:56:18,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:18,638 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-07-25 08:56:18,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-07-25 08:56:18,638 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-07-25 08:56:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:18,639 INFO L225 Difference]: With dead ends: 71 [2018-07-25 08:56:18,639 INFO L226 Difference]: Without dead ends: 69 [2018-07-25 08:56:18,639 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-25 08:56:18,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-07-25 08:56:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-07-25 08:56:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-07-25 08:56:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-07-25 08:56:18,646 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-07-25 08:56:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:18,646 INFO L472 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-07-25 08:56:18,646 INFO L473 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-25 08:56:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-07-25 08:56:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-25 08:56:18,647 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:18,647 INFO L354 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-07-25 08:56:18,647 INFO L415 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:18,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-07-25 08:56:18,648 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:19,148 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:19,148 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-07-25 08:56:19,148 INFO L451 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-25 08:56:19,149 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-25 08:56:19,149 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-25 08:56:19,150 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-07-25 08:56:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:19,227 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-07-25 08:56:19,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-25 08:56:19,228 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-07-25 08:56:19,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:19,229 INFO L225 Difference]: With dead ends: 72 [2018-07-25 08:56:19,229 INFO L226 Difference]: Without dead ends: 70 [2018-07-25 08:56:19,229 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-25 08:56:19,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-07-25 08:56:19,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-07-25 08:56:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-07-25 08:56:19,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-07-25 08:56:19,236 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-07-25 08:56:19,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:19,237 INFO L472 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-07-25 08:56:19,237 INFO L473 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-25 08:56:19,237 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-07-25 08:56:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-07-25 08:56:19,237 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:19,237 INFO L354 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-07-25 08:56:19,238 INFO L415 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:19,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-07-25 08:56:19,238 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:19,707 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:19,707 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-07-25 08:56:19,708 INFO L451 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-25 08:56:19,708 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-25 08:56:19,708 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-25 08:56:19,709 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-07-25 08:56:19,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:19,772 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-07-25 08:56:19,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-25 08:56:19,773 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-07-25 08:56:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:19,773 INFO L225 Difference]: With dead ends: 73 [2018-07-25 08:56:19,773 INFO L226 Difference]: Without dead ends: 71 [2018-07-25 08:56:19,774 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-25 08:56:19,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-07-25 08:56:19,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-07-25 08:56:19,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-25 08:56:19,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-07-25 08:56:19,780 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-07-25 08:56:19,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:19,781 INFO L472 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-07-25 08:56:19,781 INFO L473 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-25 08:56:19,781 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-07-25 08:56:19,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-07-25 08:56:19,782 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:19,782 INFO L354 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-07-25 08:56:19,782 INFO L415 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:19,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-07-25 08:56:19,782 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:20,259 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:20,259 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-07-25 08:56:20,259 INFO L451 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-25 08:56:20,260 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-25 08:56:20,260 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-25 08:56:20,260 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-07-25 08:56:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:20,311 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-07-25 08:56:20,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-25 08:56:20,312 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-07-25 08:56:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:20,312 INFO L225 Difference]: With dead ends: 74 [2018-07-25 08:56:20,312 INFO L226 Difference]: Without dead ends: 72 [2018-07-25 08:56:20,313 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-25 08:56:20,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-07-25 08:56:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-07-25 08:56:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-07-25 08:56:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-07-25 08:56:20,322 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-07-25 08:56:20,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:20,322 INFO L472 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-07-25 08:56:20,322 INFO L473 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-25 08:56:20,322 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-07-25 08:56:20,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-07-25 08:56:20,323 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:20,323 INFO L354 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-07-25 08:56:20,323 INFO L415 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:20,324 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-07-25 08:56:20,324 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:20,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:20,926 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:20,927 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-07-25 08:56:20,927 INFO L451 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-25 08:56:20,928 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-25 08:56:20,928 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-25 08:56:20,928 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-07-25 08:56:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:20,986 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-07-25 08:56:20,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-25 08:56:20,986 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-07-25 08:56:20,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:20,987 INFO L225 Difference]: With dead ends: 75 [2018-07-25 08:56:20,987 INFO L226 Difference]: Without dead ends: 73 [2018-07-25 08:56:20,987 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-25 08:56:20,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-07-25 08:56:20,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-07-25 08:56:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-07-25 08:56:20,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-07-25 08:56:20,995 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-07-25 08:56:20,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:20,996 INFO L472 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-07-25 08:56:20,996 INFO L473 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-25 08:56:20,996 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-07-25 08:56:20,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-07-25 08:56:20,996 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:20,997 INFO L354 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-07-25 08:56:20,997 INFO L415 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:20,997 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-07-25 08:56:20,997 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:21,745 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:21,746 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-07-25 08:56:21,746 INFO L451 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-25 08:56:21,747 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-25 08:56:21,747 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-25 08:56:21,748 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-07-25 08:56:21,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:21,840 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-07-25 08:56:21,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-25 08:56:21,840 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-07-25 08:56:21,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:21,841 INFO L225 Difference]: With dead ends: 76 [2018-07-25 08:56:21,841 INFO L226 Difference]: Without dead ends: 74 [2018-07-25 08:56:21,842 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-25 08:56:21,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-07-25 08:56:21,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-07-25 08:56:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-07-25 08:56:21,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-07-25 08:56:21,852 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-07-25 08:56:21,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:21,852 INFO L472 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-07-25 08:56:21,852 INFO L473 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-25 08:56:21,852 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-07-25 08:56:21,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-07-25 08:56:21,853 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:21,853 INFO L354 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-07-25 08:56:21,854 INFO L415 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:21,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-07-25 08:56:21,854 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:22,549 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:22,549 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-07-25 08:56:22,550 INFO L451 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-25 08:56:22,551 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-25 08:56:22,551 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-25 08:56:22,551 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-07-25 08:56:22,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:22,640 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-07-25 08:56:22,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-07-25 08:56:22,640 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-07-25 08:56:22,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:22,641 INFO L225 Difference]: With dead ends: 77 [2018-07-25 08:56:22,641 INFO L226 Difference]: Without dead ends: 75 [2018-07-25 08:56:22,642 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-25 08:56:22,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-07-25 08:56:22,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-07-25 08:56:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-07-25 08:56:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-07-25 08:56:22,650 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-07-25 08:56:22,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:22,650 INFO L472 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-07-25 08:56:22,650 INFO L473 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-25 08:56:22,650 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-07-25 08:56:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-25 08:56:22,651 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:22,651 INFO L354 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-07-25 08:56:22,651 INFO L415 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:22,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-07-25 08:56:22,652 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:23,251 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:23,251 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-07-25 08:56:23,252 INFO L451 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-25 08:56:23,252 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-25 08:56:23,253 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-25 08:56:23,253 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-07-25 08:56:23,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:23,330 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-07-25 08:56:23,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-25 08:56:23,330 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-07-25 08:56:23,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:23,331 INFO L225 Difference]: With dead ends: 78 [2018-07-25 08:56:23,331 INFO L226 Difference]: Without dead ends: 76 [2018-07-25 08:56:23,332 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-25 08:56:23,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-07-25 08:56:23,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-07-25 08:56:23,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-07-25 08:56:23,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-07-25 08:56:23,339 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-07-25 08:56:23,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:23,340 INFO L472 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-07-25 08:56:23,340 INFO L473 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-25 08:56:23,340 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-07-25 08:56:23,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-07-25 08:56:23,341 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:23,341 INFO L354 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-07-25 08:56:23,341 INFO L415 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:23,341 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-07-25 08:56:23,341 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:23,944 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:23,944 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-07-25 08:56:23,944 INFO L451 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-25 08:56:23,945 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-25 08:56:23,945 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-25 08:56:23,945 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-07-25 08:56:24,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:24,022 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-07-25 08:56:24,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-25 08:56:24,023 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-07-25 08:56:24,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:24,023 INFO L225 Difference]: With dead ends: 79 [2018-07-25 08:56:24,023 INFO L226 Difference]: Without dead ends: 77 [2018-07-25 08:56:24,024 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-25 08:56:24,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-07-25 08:56:24,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-07-25 08:56:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-07-25 08:56:24,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-07-25 08:56:24,031 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-07-25 08:56:24,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:24,031 INFO L472 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-07-25 08:56:24,032 INFO L473 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-25 08:56:24,032 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-07-25 08:56:24,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-07-25 08:56:24,032 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:24,033 INFO L354 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-07-25 08:56:24,033 INFO L415 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:24,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-07-25 08:56:24,033 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:24,662 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:24,663 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-07-25 08:56:24,663 INFO L451 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-25 08:56:24,663 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-25 08:56:24,664 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-25 08:56:24,664 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-07-25 08:56:24,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:24,743 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-07-25 08:56:24,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-25 08:56:24,743 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-07-25 08:56:24,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:24,743 INFO L225 Difference]: With dead ends: 80 [2018-07-25 08:56:24,743 INFO L226 Difference]: Without dead ends: 78 [2018-07-25 08:56:24,744 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-25 08:56:24,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-07-25 08:56:24,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-07-25 08:56:24,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-07-25 08:56:24,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-07-25 08:56:24,750 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-07-25 08:56:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:24,750 INFO L472 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-07-25 08:56:24,750 INFO L473 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-25 08:56:24,750 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-07-25 08:56:24,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-07-25 08:56:24,751 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:24,751 INFO L354 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-07-25 08:56:24,751 INFO L415 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:24,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-07-25 08:56:24,751 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:25,332 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:25,332 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-07-25 08:56:25,332 INFO L451 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-25 08:56:25,356 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-25 08:56:25,356 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-25 08:56:25,357 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-07-25 08:56:25,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:25,439 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-07-25 08:56:25,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-07-25 08:56:25,439 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-07-25 08:56:25,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:25,439 INFO L225 Difference]: With dead ends: 81 [2018-07-25 08:56:25,440 INFO L226 Difference]: Without dead ends: 79 [2018-07-25 08:56:25,440 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-25 08:56:25,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-07-25 08:56:25,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-07-25 08:56:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-07-25 08:56:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-07-25 08:56:25,448 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-07-25 08:56:25,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:25,449 INFO L472 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-07-25 08:56:25,449 INFO L473 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-25 08:56:25,449 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-07-25 08:56:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-07-25 08:56:25,449 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:25,450 INFO L354 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-07-25 08:56:25,450 INFO L415 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:25,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-07-25 08:56:25,450 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:26,004 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:26,004 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-07-25 08:56:26,005 INFO L451 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-25 08:56:26,005 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-25 08:56:26,006 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-25 08:56:26,006 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-07-25 08:56:26,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:26,087 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-07-25 08:56:26,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-25 08:56:26,087 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-07-25 08:56:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:26,088 INFO L225 Difference]: With dead ends: 82 [2018-07-25 08:56:26,088 INFO L226 Difference]: Without dead ends: 80 [2018-07-25 08:56:26,088 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-25 08:56:26,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-07-25 08:56:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-07-25 08:56:26,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-25 08:56:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-07-25 08:56:26,095 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-07-25 08:56:26,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:26,095 INFO L472 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-07-25 08:56:26,095 INFO L473 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-25 08:56:26,095 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-07-25 08:56:26,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-07-25 08:56:26,095 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:26,096 INFO L354 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-07-25 08:56:26,096 INFO L415 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:26,096 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-07-25 08:56:26,096 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:26,739 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:26,739 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-07-25 08:56:26,739 INFO L451 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-25 08:56:26,740 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-25 08:56:26,741 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-25 08:56:26,741 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-07-25 08:56:26,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:26,804 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-07-25 08:56:26,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-25 08:56:26,804 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-07-25 08:56:26,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:26,805 INFO L225 Difference]: With dead ends: 83 [2018-07-25 08:56:26,805 INFO L226 Difference]: Without dead ends: 81 [2018-07-25 08:56:26,806 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-25 08:56:26,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-07-25 08:56:26,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-07-25 08:56:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-07-25 08:56:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-07-25 08:56:26,815 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-07-25 08:56:26,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:26,815 INFO L472 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-07-25 08:56:26,815 INFO L473 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-25 08:56:26,815 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-07-25 08:56:26,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-25 08:56:26,816 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:26,816 INFO L354 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-07-25 08:56:26,816 INFO L415 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:26,816 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-07-25 08:56:26,817 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:27,523 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:27,523 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-07-25 08:56:27,524 INFO L451 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-25 08:56:27,524 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-25 08:56:27,525 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-25 08:56:27,525 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-07-25 08:56:27,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:27,584 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-07-25 08:56:27,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-25 08:56:27,585 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-07-25 08:56:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:27,585 INFO L225 Difference]: With dead ends: 84 [2018-07-25 08:56:27,586 INFO L226 Difference]: Without dead ends: 82 [2018-07-25 08:56:27,586 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-25 08:56:27,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-07-25 08:56:27,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-07-25 08:56:27,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-07-25 08:56:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-07-25 08:56:27,596 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-07-25 08:56:27,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:27,596 INFO L472 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-07-25 08:56:27,596 INFO L473 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-25 08:56:27,596 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-07-25 08:56:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-07-25 08:56:27,597 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:27,597 INFO L354 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-07-25 08:56:27,597 INFO L415 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:27,597 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-07-25 08:56:27,600 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:28,328 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:28,328 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-07-25 08:56:28,328 INFO L451 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-25 08:56:28,329 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-25 08:56:28,330 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-25 08:56:28,330 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-07-25 08:56:28,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:28,426 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-07-25 08:56:28,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-25 08:56:28,426 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-07-25 08:56:28,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:28,427 INFO L225 Difference]: With dead ends: 85 [2018-07-25 08:56:28,427 INFO L226 Difference]: Without dead ends: 83 [2018-07-25 08:56:28,428 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-25 08:56:28,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-07-25 08:56:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-07-25 08:56:28,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-07-25 08:56:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-07-25 08:56:28,437 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-07-25 08:56:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:28,438 INFO L472 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-07-25 08:56:28,438 INFO L473 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-25 08:56:28,438 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-07-25 08:56:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-07-25 08:56:28,438 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:28,438 INFO L354 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-07-25 08:56:28,439 INFO L415 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:28,439 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-07-25 08:56:28,439 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:29,214 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:29,214 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-07-25 08:56:29,214 INFO L451 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-25 08:56:29,215 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-25 08:56:29,215 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-25 08:56:29,216 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-07-25 08:56:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:29,313 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-07-25 08:56:29,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-25 08:56:29,313 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-07-25 08:56:29,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:29,314 INFO L225 Difference]: With dead ends: 86 [2018-07-25 08:56:29,314 INFO L226 Difference]: Without dead ends: 84 [2018-07-25 08:56:29,315 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-25 08:56:29,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-07-25 08:56:29,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-07-25 08:56:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-07-25 08:56:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-07-25 08:56:29,324 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-07-25 08:56:29,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:29,324 INFO L472 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-07-25 08:56:29,324 INFO L473 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-25 08:56:29,324 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-07-25 08:56:29,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-07-25 08:56:29,325 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:29,325 INFO L354 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-07-25 08:56:29,325 INFO L415 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:29,326 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-07-25 08:56:29,326 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:29,881 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:29,881 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-07-25 08:56:29,881 INFO L451 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-07-25 08:56:29,882 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-07-25 08:56:29,882 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-25 08:56:29,883 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-07-25 08:56:29,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:29,937 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-07-25 08:56:29,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-25 08:56:29,937 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-07-25 08:56:29,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:29,938 INFO L225 Difference]: With dead ends: 87 [2018-07-25 08:56:29,938 INFO L226 Difference]: Without dead ends: 85 [2018-07-25 08:56:29,938 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-25 08:56:29,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-07-25 08:56:29,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-07-25 08:56:29,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-07-25 08:56:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-07-25 08:56:29,947 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-07-25 08:56:29,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:29,947 INFO L472 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-07-25 08:56:29,947 INFO L473 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-07-25 08:56:29,947 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-07-25 08:56:29,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-07-25 08:56:29,948 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:29,948 INFO L354 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-07-25 08:56:29,948 INFO L415 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:29,948 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-07-25 08:56:29,948 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:30,514 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:30,514 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-07-25 08:56:30,514 INFO L451 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-25 08:56:30,515 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-25 08:56:30,515 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-25 08:56:30,516 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-07-25 08:56:30,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:30,591 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-07-25 08:56:30,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-25 08:56:30,591 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-07-25 08:56:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:30,592 INFO L225 Difference]: With dead ends: 88 [2018-07-25 08:56:30,592 INFO L226 Difference]: Without dead ends: 86 [2018-07-25 08:56:30,593 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-25 08:56:30,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-07-25 08:56:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-07-25 08:56:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-07-25 08:56:30,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-07-25 08:56:30,600 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-07-25 08:56:30,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:30,600 INFO L472 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-07-25 08:56:30,600 INFO L473 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-25 08:56:30,600 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-07-25 08:56:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-07-25 08:56:30,601 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:30,601 INFO L354 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-07-25 08:56:30,601 INFO L415 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:30,601 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-07-25 08:56:30,601 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:31,175 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:31,175 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-07-25 08:56:31,175 INFO L451 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-07-25 08:56:31,176 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-07-25 08:56:31,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-25 08:56:31,177 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-07-25 08:56:31,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:31,292 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-07-25 08:56:31,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-25 08:56:31,293 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-07-25 08:56:31,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:31,293 INFO L225 Difference]: With dead ends: 89 [2018-07-25 08:56:31,293 INFO L226 Difference]: Without dead ends: 87 [2018-07-25 08:56:31,294 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-25 08:56:31,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-07-25 08:56:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-07-25 08:56:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-07-25 08:56:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-07-25 08:56:31,302 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-07-25 08:56:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:31,303 INFO L472 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-07-25 08:56:31,303 INFO L473 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-07-25 08:56:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-07-25 08:56:31,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-25 08:56:31,303 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:31,303 INFO L354 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-07-25 08:56:31,304 INFO L415 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:31,304 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-07-25 08:56:31,304 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:32,112 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:32,112 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-07-25 08:56:32,112 INFO L451 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-25 08:56:32,113 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-25 08:56:32,114 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-25 08:56:32,114 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-07-25 08:56:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:32,179 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-07-25 08:56:32,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-25 08:56:32,179 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-07-25 08:56:32,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:32,180 INFO L225 Difference]: With dead ends: 90 [2018-07-25 08:56:32,180 INFO L226 Difference]: Without dead ends: 88 [2018-07-25 08:56:32,181 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-25 08:56:32,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-07-25 08:56:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-07-25 08:56:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-07-25 08:56:32,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-07-25 08:56:32,190 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-07-25 08:56:32,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:32,191 INFO L472 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-07-25 08:56:32,191 INFO L473 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-25 08:56:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-07-25 08:56:32,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-07-25 08:56:32,191 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:32,192 INFO L354 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-07-25 08:56:32,192 INFO L415 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:32,192 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-07-25 08:56:32,192 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:32,813 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:32,813 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-07-25 08:56:32,813 INFO L451 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-25 08:56:32,814 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-25 08:56:32,814 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-25 08:56:32,814 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-07-25 08:56:32,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:32,904 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-07-25 08:56:32,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-25 08:56:32,905 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-07-25 08:56:32,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:32,906 INFO L225 Difference]: With dead ends: 91 [2018-07-25 08:56:32,906 INFO L226 Difference]: Without dead ends: 89 [2018-07-25 08:56:32,906 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-25 08:56:32,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-07-25 08:56:32,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-07-25 08:56:32,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-25 08:56:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-07-25 08:56:32,915 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-07-25 08:56:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:32,915 INFO L472 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-07-25 08:56:32,915 INFO L473 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-25 08:56:32,915 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-07-25 08:56:32,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-07-25 08:56:32,916 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:32,916 INFO L354 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-07-25 08:56:32,916 INFO L415 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:32,916 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-07-25 08:56:32,917 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:33,540 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:33,541 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-07-25 08:56:33,541 INFO L451 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-25 08:56:33,542 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-25 08:56:33,542 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-25 08:56:33,543 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-07-25 08:56:33,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:33,610 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-07-25 08:56:33,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-25 08:56:33,611 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-07-25 08:56:33,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:33,612 INFO L225 Difference]: With dead ends: 92 [2018-07-25 08:56:33,612 INFO L226 Difference]: Without dead ends: 90 [2018-07-25 08:56:33,613 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-25 08:56:33,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-07-25 08:56:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-07-25 08:56:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-07-25 08:56:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-07-25 08:56:33,622 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-07-25 08:56:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:33,622 INFO L472 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-07-25 08:56:33,622 INFO L473 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-25 08:56:33,622 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-07-25 08:56:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-07-25 08:56:33,623 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:33,623 INFO L354 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-07-25 08:56:33,623 INFO L415 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:33,623 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-07-25 08:56:33,624 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:34,496 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:34,496 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-07-25 08:56:34,496 INFO L451 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-07-25 08:56:34,497 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-07-25 08:56:34,498 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-25 08:56:34,498 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-07-25 08:56:34,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:34,653 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-07-25 08:56:34,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-07-25 08:56:34,653 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-07-25 08:56:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:34,654 INFO L225 Difference]: With dead ends: 93 [2018-07-25 08:56:34,654 INFO L226 Difference]: Without dead ends: 91 [2018-07-25 08:56:34,655 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-25 08:56:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-07-25 08:56:34,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-07-25 08:56:34,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-07-25 08:56:34,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-07-25 08:56:34,682 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-07-25 08:56:34,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:34,683 INFO L472 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-07-25 08:56:34,683 INFO L473 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-07-25 08:56:34,683 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-07-25 08:56:34,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-07-25 08:56:34,685 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:34,686 INFO L354 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-07-25 08:56:34,686 INFO L415 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:34,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-07-25 08:56:34,686 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:35,338 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:35,338 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-07-25 08:56:35,338 INFO L451 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-25 08:56:35,339 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-25 08:56:35,340 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-25 08:56:35,340 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-07-25 08:56:35,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:35,410 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-07-25 08:56:35,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-25 08:56:35,410 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-07-25 08:56:35,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:35,411 INFO L225 Difference]: With dead ends: 94 [2018-07-25 08:56:35,411 INFO L226 Difference]: Without dead ends: 92 [2018-07-25 08:56:35,412 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-25 08:56:35,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-07-25 08:56:35,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-07-25 08:56:35,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-07-25 08:56:35,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-07-25 08:56:35,422 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-07-25 08:56:35,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:35,423 INFO L472 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-07-25 08:56:35,423 INFO L473 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-25 08:56:35,423 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-07-25 08:56:35,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-07-25 08:56:35,428 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:35,428 INFO L354 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-07-25 08:56:35,428 INFO L415 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:35,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-07-25 08:56:35,428 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:36,195 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:36,195 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2018-07-25 08:56:36,195 INFO L451 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-07-25 08:56:36,196 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-07-25 08:56:36,196 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-25 08:56:36,196 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-07-25 08:56:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:36,289 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-07-25 08:56:36,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-07-25 08:56:36,289 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-07-25 08:56:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:36,290 INFO L225 Difference]: With dead ends: 95 [2018-07-25 08:56:36,290 INFO L226 Difference]: Without dead ends: 93 [2018-07-25 08:56:36,291 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-25 08:56:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-07-25 08:56:36,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-07-25 08:56:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-07-25 08:56:36,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-07-25 08:56:36,302 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-07-25 08:56:36,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:36,302 INFO L472 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-07-25 08:56:36,303 INFO L473 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-07-25 08:56:36,303 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-07-25 08:56:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-07-25 08:56:36,303 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:36,304 INFO L354 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-07-25 08:56:36,304 INFO L415 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:36,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-07-25 08:56:36,304 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:36,894 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:36,895 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-07-25 08:56:36,895 INFO L451 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-25 08:56:36,895 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-25 08:56:36,896 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-25 08:56:36,896 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-07-25 08:56:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:36,985 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-07-25 08:56:36,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-25 08:56:36,985 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-07-25 08:56:36,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:36,986 INFO L225 Difference]: With dead ends: 96 [2018-07-25 08:56:36,986 INFO L226 Difference]: Without dead ends: 94 [2018-07-25 08:56:36,987 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-25 08:56:36,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-07-25 08:56:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-07-25 08:56:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-07-25 08:56:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-07-25 08:56:36,996 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-07-25 08:56:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:36,996 INFO L472 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-07-25 08:56:36,996 INFO L473 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-25 08:56:36,996 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-07-25 08:56:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-07-25 08:56:36,997 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:36,997 INFO L354 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-07-25 08:56:36,997 INFO L415 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:36,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-07-25 08:56:36,998 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:37,640 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:37,640 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-07-25 08:56:37,641 INFO L451 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-25 08:56:37,641 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-25 08:56:37,642 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-25 08:56:37,642 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-07-25 08:56:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:37,694 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-07-25 08:56:37,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-07-25 08:56:37,694 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-07-25 08:56:37,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:37,695 INFO L225 Difference]: With dead ends: 97 [2018-07-25 08:56:37,695 INFO L226 Difference]: Without dead ends: 95 [2018-07-25 08:56:37,696 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-25 08:56:37,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-07-25 08:56:37,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-07-25 08:56:37,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-07-25 08:56:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-07-25 08:56:37,704 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-07-25 08:56:37,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:37,704 INFO L472 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-07-25 08:56:37,704 INFO L473 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-25 08:56:37,704 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-07-25 08:56:37,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-07-25 08:56:37,704 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:37,704 INFO L354 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-07-25 08:56:37,705 INFO L415 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:37,705 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-07-25 08:56:37,705 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:38,386 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:38,386 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-07-25 08:56:38,387 INFO L451 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-25 08:56:38,387 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-25 08:56:38,388 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-25 08:56:38,388 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-07-25 08:56:38,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:38,462 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-07-25 08:56:38,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-25 08:56:38,462 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-07-25 08:56:38,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:38,463 INFO L225 Difference]: With dead ends: 98 [2018-07-25 08:56:38,463 INFO L226 Difference]: Without dead ends: 96 [2018-07-25 08:56:38,464 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-25 08:56:38,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-07-25 08:56:38,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-07-25 08:56:38,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-07-25 08:56:38,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-07-25 08:56:38,473 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-07-25 08:56:38,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:38,473 INFO L472 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-07-25 08:56:38,473 INFO L473 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-25 08:56:38,473 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-07-25 08:56:38,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-07-25 08:56:38,474 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:38,474 INFO L354 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-07-25 08:56:38,474 INFO L415 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:38,474 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-07-25 08:56:38,475 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:39,135 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:39,135 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2018-07-25 08:56:39,135 INFO L451 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-07-25 08:56:39,136 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-07-25 08:56:39,136 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-25 08:56:39,136 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-07-25 08:56:39,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:39,239 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-07-25 08:56:39,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-07-25 08:56:39,239 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-07-25 08:56:39,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:39,239 INFO L225 Difference]: With dead ends: 99 [2018-07-25 08:56:39,240 INFO L226 Difference]: Without dead ends: 97 [2018-07-25 08:56:39,240 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-25 08:56:39,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-07-25 08:56:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-07-25 08:56:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-07-25 08:56:39,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-07-25 08:56:39,247 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-07-25 08:56:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:39,247 INFO L472 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-07-25 08:56:39,247 INFO L473 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-07-25 08:56:39,247 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-07-25 08:56:39,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-07-25 08:56:39,247 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:39,248 INFO L354 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-07-25 08:56:39,248 INFO L415 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:39,248 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-07-25 08:56:39,248 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:39,874 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:39,874 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-07-25 08:56:39,875 INFO L451 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-25 08:56:39,875 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-25 08:56:39,875 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-25 08:56:39,876 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-07-25 08:56:39,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:39,958 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-07-25 08:56:39,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-25 08:56:39,958 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-07-25 08:56:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:39,959 INFO L225 Difference]: With dead ends: 100 [2018-07-25 08:56:39,959 INFO L226 Difference]: Without dead ends: 98 [2018-07-25 08:56:39,959 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-25 08:56:39,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-07-25 08:56:39,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-07-25 08:56:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-25 08:56:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-07-25 08:56:39,966 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-07-25 08:56:39,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:39,966 INFO L472 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-07-25 08:56:39,966 INFO L473 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-25 08:56:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-07-25 08:56:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-07-25 08:56:39,967 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:39,967 INFO L354 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-07-25 08:56:39,967 INFO L415 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:39,967 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-07-25 08:56:39,967 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:40,539 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:40,539 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-07-25 08:56:40,539 INFO L451 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-07-25 08:56:40,540 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-07-25 08:56:40,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-25 08:56:40,541 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-07-25 08:56:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:40,608 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-07-25 08:56:40,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-25 08:56:40,608 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-07-25 08:56:40,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:40,609 INFO L225 Difference]: With dead ends: 101 [2018-07-25 08:56:40,609 INFO L226 Difference]: Without dead ends: 99 [2018-07-25 08:56:40,610 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-25 08:56:40,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-07-25 08:56:40,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-07-25 08:56:40,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-07-25 08:56:40,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-07-25 08:56:40,615 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-07-25 08:56:40,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:40,616 INFO L472 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-07-25 08:56:40,616 INFO L473 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-07-25 08:56:40,616 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-07-25 08:56:40,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-07-25 08:56:40,616 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:40,616 INFO L354 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-07-25 08:56:40,616 INFO L415 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:40,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-07-25 08:56:40,617 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:41,350 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:41,350 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-07-25 08:56:41,350 INFO L451 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-07-25 08:56:41,351 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-07-25 08:56:41,352 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-25 08:56:41,352 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-07-25 08:56:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:41,408 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-07-25 08:56:41,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-25 08:56:41,408 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-07-25 08:56:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:41,409 INFO L225 Difference]: With dead ends: 102 [2018-07-25 08:56:41,409 INFO L226 Difference]: Without dead ends: 100 [2018-07-25 08:56:41,410 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-25 08:56:41,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-07-25 08:56:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-07-25 08:56:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-07-25 08:56:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-07-25 08:56:41,417 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-07-25 08:56:41,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:41,417 INFO L472 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-07-25 08:56:41,417 INFO L473 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-07-25 08:56:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-07-25 08:56:41,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-07-25 08:56:41,418 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:41,418 INFO L354 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-07-25 08:56:41,418 INFO L415 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:41,418 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-07-25 08:56:41,418 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:42,256 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:42,257 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2018-07-25 08:56:42,257 INFO L451 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-07-25 08:56:42,257 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-07-25 08:56:42,258 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-25 08:56:42,258 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-07-25 08:56:42,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:42,328 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-07-25 08:56:42,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-07-25 08:56:42,329 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-07-25 08:56:42,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:42,329 INFO L225 Difference]: With dead ends: 103 [2018-07-25 08:56:42,329 INFO L226 Difference]: Without dead ends: 101 [2018-07-25 08:56:42,330 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-25 08:56:42,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-07-25 08:56:42,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-07-25 08:56:42,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-07-25 08:56:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-07-25 08:56:42,339 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-07-25 08:56:42,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:42,339 INFO L472 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-07-25 08:56:42,339 INFO L473 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-07-25 08:56:42,339 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-07-25 08:56:42,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-07-25 08:56:42,340 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:42,340 INFO L354 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-07-25 08:56:42,340 INFO L415 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:42,340 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-07-25 08:56:42,341 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:43,159 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:43,159 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-07-25 08:56:43,159 INFO L451 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-07-25 08:56:43,160 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-07-25 08:56:43,161 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-07-25 08:56:43,161 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-07-25 08:56:43,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:43,280 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-07-25 08:56:43,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-25 08:56:43,280 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-07-25 08:56:43,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:43,281 INFO L225 Difference]: With dead ends: 104 [2018-07-25 08:56:43,281 INFO L226 Difference]: Without dead ends: 102 [2018-07-25 08:56:43,282 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-07-25 08:56:43,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-07-25 08:56:43,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-07-25 08:56:43,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-07-25 08:56:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-07-25 08:56:43,293 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-07-25 08:56:43,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:43,293 INFO L472 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-07-25 08:56:43,293 INFO L473 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-07-25 08:56:43,293 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-07-25 08:56:43,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-07-25 08:56:43,294 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:43,294 INFO L354 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-07-25 08:56:43,294 INFO L415 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:43,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-07-25 08:56:43,295 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:44,092 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:44,092 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2018-07-25 08:56:44,092 INFO L451 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-07-25 08:56:44,093 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-07-25 08:56:44,093 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-25 08:56:44,094 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-07-25 08:56:44,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:44,173 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-07-25 08:56:44,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-07-25 08:56:44,173 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-07-25 08:56:44,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:44,174 INFO L225 Difference]: With dead ends: 105 [2018-07-25 08:56:44,174 INFO L226 Difference]: Without dead ends: 103 [2018-07-25 08:56:44,175 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-25 08:56:44,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-07-25 08:56:44,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-07-25 08:56:44,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-07-25 08:56:44,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-07-25 08:56:44,182 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-07-25 08:56:44,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:44,182 INFO L472 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-07-25 08:56:44,182 INFO L473 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-07-25 08:56:44,182 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-07-25 08:56:44,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-07-25 08:56:44,183 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:44,183 INFO L354 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-07-25 08:56:44,183 INFO L415 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:44,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-07-25 08:56:44,183 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:44,957 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:44,957 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2018-07-25 08:56:44,957 INFO L451 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-07-25 08:56:44,958 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-07-25 08:56:44,959 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-25 08:56:44,959 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-07-25 08:56:45,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:45,038 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-07-25 08:56:45,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-25 08:56:45,038 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-07-25 08:56:45,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:45,039 INFO L225 Difference]: With dead ends: 106 [2018-07-25 08:56:45,039 INFO L226 Difference]: Without dead ends: 104 [2018-07-25 08:56:45,040 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-25 08:56:45,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-07-25 08:56:45,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-07-25 08:56:45,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-07-25 08:56:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-07-25 08:56:45,050 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-07-25 08:56:45,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:45,050 INFO L472 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-07-25 08:56:45,050 INFO L473 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-07-25 08:56:45,050 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-07-25 08:56:45,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-07-25 08:56:45,051 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:45,051 INFO L354 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-07-25 08:56:45,051 INFO L415 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:45,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-07-25 08:56:45,052 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:45,862 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:45,862 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2018-07-25 08:56:45,862 INFO L451 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-07-25 08:56:45,863 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-07-25 08:56:45,863 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-25 08:56:45,863 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-07-25 08:56:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:45,950 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-07-25 08:56:45,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-07-25 08:56:45,951 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-07-25 08:56:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:45,951 INFO L225 Difference]: With dead ends: 107 [2018-07-25 08:56:45,952 INFO L226 Difference]: Without dead ends: 105 [2018-07-25 08:56:45,952 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-25 08:56:45,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-07-25 08:56:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-07-25 08:56:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-07-25 08:56:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-07-25 08:56:45,962 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-07-25 08:56:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:45,962 INFO L472 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-07-25 08:56:45,962 INFO L473 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-07-25 08:56:45,962 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-07-25 08:56:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-07-25 08:56:45,963 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:45,963 INFO L354 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-07-25 08:56:45,963 INFO L415 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:45,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-07-25 08:56:45,964 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:47,068 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:47,068 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2018-07-25 08:56:47,068 INFO L451 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-07-25 08:56:47,070 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-07-25 08:56:47,070 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-07-25 08:56:47,071 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-07-25 08:56:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:47,239 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-07-25 08:56:47,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-07-25 08:56:47,239 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-07-25 08:56:47,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:47,240 INFO L225 Difference]: With dead ends: 108 [2018-07-25 08:56:47,240 INFO L226 Difference]: Without dead ends: 106 [2018-07-25 08:56:47,241 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-07-25 08:56:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-07-25 08:56:47,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-07-25 08:56:47,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-07-25 08:56:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-07-25 08:56:47,251 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-07-25 08:56:47,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:47,252 INFO L472 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-07-25 08:56:47,252 INFO L473 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-07-25 08:56:47,252 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-07-25 08:56:47,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-07-25 08:56:47,252 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:47,252 INFO L354 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-07-25 08:56:47,253 INFO L415 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:47,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-07-25 08:56:47,253 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:48,030 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:48,030 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2018-07-25 08:56:48,030 INFO L451 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-07-25 08:56:48,031 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-07-25 08:56:48,031 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-07-25 08:56:48,032 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-07-25 08:56:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:48,160 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-07-25 08:56:48,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-07-25 08:56:48,161 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-07-25 08:56:48,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:48,161 INFO L225 Difference]: With dead ends: 109 [2018-07-25 08:56:48,162 INFO L226 Difference]: Without dead ends: 107 [2018-07-25 08:56:48,162 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-07-25 08:56:48,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-07-25 08:56:48,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-07-25 08:56:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-25 08:56:48,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-07-25 08:56:48,173 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-07-25 08:56:48,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:48,173 INFO L472 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-07-25 08:56:48,173 INFO L473 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-07-25 08:56:48,173 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-07-25 08:56:48,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-07-25 08:56:48,174 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:48,174 INFO L354 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-07-25 08:56:48,174 INFO L415 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:48,175 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-07-25 08:56:48,175 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:48,975 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:48,975 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2018-07-25 08:56:48,975 INFO L451 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-07-25 08:56:48,976 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-07-25 08:56:48,977 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-07-25 08:56:48,977 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-07-25 08:56:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:49,124 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-07-25 08:56:49,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-07-25 08:56:49,124 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-07-25 08:56:49,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:49,125 INFO L225 Difference]: With dead ends: 110 [2018-07-25 08:56:49,125 INFO L226 Difference]: Without dead ends: 108 [2018-07-25 08:56:49,126 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-07-25 08:56:49,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-07-25 08:56:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-07-25 08:56:49,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-07-25 08:56:49,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-07-25 08:56:49,136 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-07-25 08:56:49,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:49,137 INFO L472 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-07-25 08:56:49,137 INFO L473 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-07-25 08:56:49,137 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-07-25 08:56:49,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-07-25 08:56:49,137 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:49,137 INFO L354 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-07-25 08:56:49,138 INFO L415 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:49,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-07-25 08:56:49,138 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:50,176 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:50,176 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2018-07-25 08:56:50,176 INFO L451 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-07-25 08:56:50,177 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-07-25 08:56:50,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-07-25 08:56:50,177 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-07-25 08:56:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:50,265 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-07-25 08:56:50,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-07-25 08:56:50,265 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-07-25 08:56:50,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:50,266 INFO L225 Difference]: With dead ends: 111 [2018-07-25 08:56:50,266 INFO L226 Difference]: Without dead ends: 109 [2018-07-25 08:56:50,266 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-07-25 08:56:50,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-07-25 08:56:50,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-07-25 08:56:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-07-25 08:56:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-07-25 08:56:50,275 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-07-25 08:56:50,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:50,275 INFO L472 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-07-25 08:56:50,275 INFO L473 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-07-25 08:56:50,275 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-07-25 08:56:50,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-07-25 08:56:50,276 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:50,276 INFO L354 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-07-25 08:56:50,276 INFO L415 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:50,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-07-25 08:56:50,277 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:51,062 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:51,062 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2018-07-25 08:56:51,062 INFO L451 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-07-25 08:56:51,063 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-07-25 08:56:51,063 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-07-25 08:56:51,064 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-07-25 08:56:51,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:51,145 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-07-25 08:56:51,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-07-25 08:56:51,145 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-07-25 08:56:51,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:51,146 INFO L225 Difference]: With dead ends: 112 [2018-07-25 08:56:51,146 INFO L226 Difference]: Without dead ends: 110 [2018-07-25 08:56:51,147 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-07-25 08:56:51,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-07-25 08:56:51,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-07-25 08:56:51,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-07-25 08:56:51,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-07-25 08:56:51,157 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-07-25 08:56:51,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:51,158 INFO L472 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-07-25 08:56:51,158 INFO L473 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-07-25 08:56:51,158 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-07-25 08:56:51,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-07-25 08:56:51,158 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:51,159 INFO L354 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-07-25 08:56:51,159 INFO L415 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:51,160 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-07-25 08:56:51,160 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:51,988 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:51,988 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2018-07-25 08:56:51,988 INFO L451 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-07-25 08:56:51,989 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-07-25 08:56:51,990 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-07-25 08:56:51,990 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-07-25 08:56:52,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:52,150 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-07-25 08:56:52,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-07-25 08:56:52,151 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-07-25 08:56:52,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:52,151 INFO L225 Difference]: With dead ends: 113 [2018-07-25 08:56:52,151 INFO L226 Difference]: Without dead ends: 111 [2018-07-25 08:56:52,152 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-07-25 08:56:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-07-25 08:56:52,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-07-25 08:56:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-07-25 08:56:52,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-07-25 08:56:52,164 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-07-25 08:56:52,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:52,164 INFO L472 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-07-25 08:56:52,165 INFO L473 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-07-25 08:56:52,165 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-07-25 08:56:52,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-07-25 08:56:52,165 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:52,166 INFO L354 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-07-25 08:56:52,166 INFO L415 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:52,166 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-07-25 08:56:52,166 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:53,211 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:53,211 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2018-07-25 08:56:53,211 INFO L451 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-07-25 08:56:53,213 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-07-25 08:56:53,214 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-07-25 08:56:53,214 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-07-25 08:56:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:53,371 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-07-25 08:56:53,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-25 08:56:53,371 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-07-25 08:56:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:53,372 INFO L225 Difference]: With dead ends: 114 [2018-07-25 08:56:53,372 INFO L226 Difference]: Without dead ends: 112 [2018-07-25 08:56:53,373 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-07-25 08:56:53,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-07-25 08:56:53,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-07-25 08:56:53,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-07-25 08:56:53,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-07-25 08:56:53,383 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-07-25 08:56:53,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:53,383 INFO L472 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-07-25 08:56:53,383 INFO L473 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-07-25 08:56:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-07-25 08:56:53,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-07-25 08:56:53,384 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:53,384 INFO L354 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-07-25 08:56:53,384 INFO L415 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:53,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1271178720, now seen corresponding path program 108 times [2018-07-25 08:56:53,384 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:54,293 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:54,293 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2018-07-25 08:56:54,293 INFO L451 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-07-25 08:56:54,294 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-07-25 08:56:54,295 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-07-25 08:56:54,295 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-07-25 08:56:54,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:54,411 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-07-25 08:56:54,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-07-25 08:56:54,412 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-07-25 08:56:54,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:54,412 INFO L225 Difference]: With dead ends: 115 [2018-07-25 08:56:54,412 INFO L226 Difference]: Without dead ends: 113 [2018-07-25 08:56:54,413 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-07-25 08:56:54,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-07-25 08:56:54,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-07-25 08:56:54,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-07-25 08:56:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-07-25 08:56:54,423 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-07-25 08:56:54,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:54,424 INFO L472 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-07-25 08:56:54,424 INFO L473 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-07-25 08:56:54,424 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-07-25 08:56:54,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-07-25 08:56:54,425 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:54,425 INFO L354 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-07-25 08:56:54,425 INFO L415 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:54,425 INFO L82 PathProgramCache]: Analyzing trace with hash 751830790, now seen corresponding path program 109 times [2018-07-25 08:56:54,425 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:55,324 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:55,324 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2018-07-25 08:56:55,324 INFO L451 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-07-25 08:56:55,326 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-07-25 08:56:55,326 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-07-25 08:56:55,327 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-07-25 08:56:55,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:55,499 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-07-25 08:56:55,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-07-25 08:56:55,499 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-07-25 08:56:55,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:55,500 INFO L225 Difference]: With dead ends: 116 [2018-07-25 08:56:55,500 INFO L226 Difference]: Without dead ends: 114 [2018-07-25 08:56:55,501 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-07-25 08:56:55,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-07-25 08:56:55,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-07-25 08:56:55,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-07-25 08:56:55,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-07-25 08:56:55,511 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-07-25 08:56:55,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:55,511 INFO L472 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-07-25 08:56:55,511 INFO L473 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-07-25 08:56:55,511 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-07-25 08:56:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-07-25 08:56:55,511 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:55,512 INFO L354 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-07-25 08:56:55,512 INFO L415 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:55,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1831914144, now seen corresponding path program 110 times [2018-07-25 08:56:55,512 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:56,285 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:56,285 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2018-07-25 08:56:56,285 INFO L451 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-07-25 08:56:56,286 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-07-25 08:56:56,286 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-07-25 08:56:56,287 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-07-25 08:56:56,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:56,378 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-07-25 08:56:56,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-07-25 08:56:56,378 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-07-25 08:56:56,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:56,379 INFO L225 Difference]: With dead ends: 117 [2018-07-25 08:56:56,379 INFO L226 Difference]: Without dead ends: 115 [2018-07-25 08:56:56,380 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-07-25 08:56:56,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-07-25 08:56:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-07-25 08:56:56,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-07-25 08:56:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-07-25 08:56:56,388 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-07-25 08:56:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:56,389 INFO L472 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-07-25 08:56:56,389 INFO L473 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-07-25 08:56:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-07-25 08:56:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-07-25 08:56:56,389 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:56,390 INFO L354 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-07-25 08:56:56,390 INFO L415 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:56,390 INFO L82 PathProgramCache]: Analyzing trace with hash 954759750, now seen corresponding path program 111 times [2018-07-25 08:56:56,390 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:57,273 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:57,274 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2018-07-25 08:56:57,274 INFO L451 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-07-25 08:56:57,275 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-07-25 08:56:57,276 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-07-25 08:56:57,276 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-07-25 08:56:57,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:57,445 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-07-25 08:56:57,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-07-25 08:56:57,446 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-07-25 08:56:57,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:57,446 INFO L225 Difference]: With dead ends: 118 [2018-07-25 08:56:57,446 INFO L226 Difference]: Without dead ends: 116 [2018-07-25 08:56:57,447 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-07-25 08:56:57,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-07-25 08:56:57,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-07-25 08:56:57,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-25 08:56:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-07-25 08:56:57,458 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-07-25 08:56:57,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:57,459 INFO L472 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-07-25 08:56:57,459 INFO L473 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-07-25 08:56:57,459 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-07-25 08:56:57,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-07-25 08:56:57,459 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:57,459 INFO L354 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-07-25 08:56:57,460 INFO L415 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:57,460 INFO L82 PathProgramCache]: Analyzing trace with hash -467222688, now seen corresponding path program 112 times [2018-07-25 08:56:57,460 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:58,554 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:58,554 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2018-07-25 08:56:58,554 INFO L451 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-07-25 08:56:58,555 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-07-25 08:56:58,555 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-07-25 08:56:58,555 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-07-25 08:56:58,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:58,668 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-07-25 08:56:58,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-07-25 08:56:58,668 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-07-25 08:56:58,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:58,669 INFO L225 Difference]: With dead ends: 119 [2018-07-25 08:56:58,669 INFO L226 Difference]: Without dead ends: 117 [2018-07-25 08:56:58,669 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-07-25 08:56:58,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-07-25 08:56:58,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-07-25 08:56:58,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-07-25 08:56:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-07-25 08:56:58,679 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-07-25 08:56:58,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:58,680 INFO L472 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-07-25 08:56:58,680 INFO L473 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-07-25 08:56:58,680 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-07-25 08:56:58,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-07-25 08:56:58,680 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:58,681 INFO L354 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-07-25 08:56:58,681 INFO L415 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:58,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1599005306, now seen corresponding path program 113 times [2018-07-25 08:56:58,681 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:56:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:56:59,582 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:56:59,582 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115] total 115 [2018-07-25 08:56:59,582 INFO L451 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-07-25 08:56:59,583 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-07-25 08:56:59,584 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-07-25 08:56:59,584 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 116 states. [2018-07-25 08:56:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:56:59,707 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-07-25 08:56:59,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-07-25 08:56:59,707 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 116 [2018-07-25 08:56:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:56:59,708 INFO L225 Difference]: With dead ends: 120 [2018-07-25 08:56:59,708 INFO L226 Difference]: Without dead ends: 118 [2018-07-25 08:56:59,709 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-07-25 08:56:59,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-07-25 08:56:59,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-07-25 08:56:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-07-25 08:56:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-07-25 08:56:59,719 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-07-25 08:56:59,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:56:59,720 INFO L472 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-07-25 08:56:59,720 INFO L473 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-07-25 08:56:59,720 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-07-25 08:56:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-07-25 08:56:59,720 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:56:59,721 INFO L354 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-07-25 08:56:59,721 INFO L415 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:56:59,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1970439200, now seen corresponding path program 114 times [2018-07-25 08:56:59,721 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:56:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:00,690 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:00,690 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2018-07-25 08:57:00,691 INFO L451 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-07-25 08:57:00,692 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-07-25 08:57:00,692 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-07-25 08:57:00,692 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 117 states. [2018-07-25 08:57:00,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:00,854 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-07-25 08:57:00,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-07-25 08:57:00,855 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 117 [2018-07-25 08:57:00,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:00,855 INFO L225 Difference]: With dead ends: 121 [2018-07-25 08:57:00,855 INFO L226 Difference]: Without dead ends: 119 [2018-07-25 08:57:00,856 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-07-25 08:57:00,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-07-25 08:57:00,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-07-25 08:57:00,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-07-25 08:57:00,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-07-25 08:57:00,866 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-07-25 08:57:00,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:00,866 INFO L472 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-07-25 08:57:00,866 INFO L473 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-07-25 08:57:00,866 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-07-25 08:57:00,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-07-25 08:57:00,866 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:00,867 INFO L354 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-07-25 08:57:00,867 INFO L415 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:00,867 INFO L82 PathProgramCache]: Analyzing trace with hash 954069190, now seen corresponding path program 115 times [2018-07-25 08:57:00,867 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:01,858 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:01,858 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117] total 117 [2018-07-25 08:57:01,859 INFO L451 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-07-25 08:57:01,860 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-07-25 08:57:01,860 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-25 08:57:01,860 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 118 states. [2018-07-25 08:57:02,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:02,062 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-07-25 08:57:02,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-07-25 08:57:02,063 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-07-25 08:57:02,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:02,063 INFO L225 Difference]: With dead ends: 122 [2018-07-25 08:57:02,064 INFO L226 Difference]: Without dead ends: 120 [2018-07-25 08:57:02,065 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-25 08:57:02,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-07-25 08:57:02,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-07-25 08:57:02,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-07-25 08:57:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-07-25 08:57:02,075 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-07-25 08:57:02,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:02,076 INFO L472 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-07-25 08:57:02,076 INFO L473 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-07-25 08:57:02,076 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-07-25 08:57:02,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-07-25 08:57:02,076 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:02,077 INFO L354 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-07-25 08:57:02,077 INFO L415 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:02,077 INFO L82 PathProgramCache]: Analyzing trace with hash -488630048, now seen corresponding path program 116 times [2018-07-25 08:57:02,077 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:03,035 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:03,035 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2018-07-25 08:57:03,035 INFO L451 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-07-25 08:57:03,036 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-07-25 08:57:03,037 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-07-25 08:57:03,037 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 119 states. [2018-07-25 08:57:03,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:03,166 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-07-25 08:57:03,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-07-25 08:57:03,167 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 119 [2018-07-25 08:57:03,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:03,167 INFO L225 Difference]: With dead ends: 123 [2018-07-25 08:57:03,167 INFO L226 Difference]: Without dead ends: 121 [2018-07-25 08:57:03,168 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-07-25 08:57:03,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-07-25 08:57:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-07-25 08:57:03,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-07-25 08:57:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-07-25 08:57:03,176 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-07-25 08:57:03,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:03,176 INFO L472 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-07-25 08:57:03,176 INFO L473 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-07-25 08:57:03,176 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-07-25 08:57:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-07-25 08:57:03,176 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:03,176 INFO L354 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-07-25 08:57:03,177 INFO L415 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:03,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2032333830, now seen corresponding path program 117 times [2018-07-25 08:57:03,177 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:04,235 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:04,235 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119] total 119 [2018-07-25 08:57:04,236 INFO L451 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-07-25 08:57:04,237 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-07-25 08:57:04,238 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-07-25 08:57:04,238 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 120 states. [2018-07-25 08:57:04,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:04,426 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-07-25 08:57:04,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-07-25 08:57:04,426 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 120 [2018-07-25 08:57:04,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:04,427 INFO L225 Difference]: With dead ends: 124 [2018-07-25 08:57:04,427 INFO L226 Difference]: Without dead ends: 122 [2018-07-25 08:57:04,428 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-07-25 08:57:04,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-07-25 08:57:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-07-25 08:57:04,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-07-25 08:57:04,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-07-25 08:57:04,439 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-07-25 08:57:04,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:04,439 INFO L472 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-07-25 08:57:04,439 INFO L473 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-07-25 08:57:04,439 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-07-25 08:57:04,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-07-25 08:57:04,440 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:04,440 INFO L354 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-07-25 08:57:04,440 INFO L415 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:04,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1422164576, now seen corresponding path program 118 times [2018-07-25 08:57:04,440 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:05,431 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:05,431 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2018-07-25 08:57:05,431 INFO L451 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-07-25 08:57:05,433 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-07-25 08:57:05,433 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-07-25 08:57:05,433 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 121 states. [2018-07-25 08:57:05,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:05,608 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-07-25 08:57:05,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-07-25 08:57:05,608 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 121 [2018-07-25 08:57:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:05,609 INFO L225 Difference]: With dead ends: 125 [2018-07-25 08:57:05,609 INFO L226 Difference]: Without dead ends: 123 [2018-07-25 08:57:05,610 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-07-25 08:57:05,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-07-25 08:57:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-07-25 08:57:05,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-07-25 08:57:05,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-07-25 08:57:05,618 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-07-25 08:57:05,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:05,618 INFO L472 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-07-25 08:57:05,618 INFO L473 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-07-25 08:57:05,619 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-07-25 08:57:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-07-25 08:57:05,619 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:05,619 INFO L354 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-07-25 08:57:05,619 INFO L415 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:05,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1137432762, now seen corresponding path program 119 times [2018-07-25 08:57:05,619 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:06,768 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:06,768 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121] total 121 [2018-07-25 08:57:06,768 INFO L451 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-07-25 08:57:06,769 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-07-25 08:57:06,769 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-07-25 08:57:06,769 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 122 states. [2018-07-25 08:57:06,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:06,853 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-07-25 08:57:06,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-07-25 08:57:06,854 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-07-25 08:57:06,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:06,854 INFO L225 Difference]: With dead ends: 126 [2018-07-25 08:57:06,854 INFO L226 Difference]: Without dead ends: 124 [2018-07-25 08:57:06,855 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-07-25 08:57:06,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-07-25 08:57:06,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-07-25 08:57:06,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-07-25 08:57:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-07-25 08:57:06,865 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-07-25 08:57:06,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:06,865 INFO L472 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-07-25 08:57:06,866 INFO L473 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-07-25 08:57:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-07-25 08:57:06,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-07-25 08:57:06,866 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:06,866 INFO L354 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-07-25 08:57:06,866 INFO L415 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:06,867 INFO L82 PathProgramCache]: Analyzing trace with hash -900681120, now seen corresponding path program 120 times [2018-07-25 08:57:06,867 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:07,866 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:07,866 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2018-07-25 08:57:07,867 INFO L451 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-07-25 08:57:07,868 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-07-25 08:57:07,868 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-07-25 08:57:07,869 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 123 states. [2018-07-25 08:57:08,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:08,047 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-07-25 08:57:08,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-07-25 08:57:08,048 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 123 [2018-07-25 08:57:08,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:08,048 INFO L225 Difference]: With dead ends: 127 [2018-07-25 08:57:08,048 INFO L226 Difference]: Without dead ends: 125 [2018-07-25 08:57:08,049 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-07-25 08:57:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-07-25 08:57:08,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-07-25 08:57:08,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-25 08:57:08,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-07-25 08:57:08,057 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-07-25 08:57:08,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:08,057 INFO L472 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-07-25 08:57:08,057 INFO L473 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-07-25 08:57:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-07-25 08:57:08,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-07-25 08:57:08,058 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:08,058 INFO L354 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-07-25 08:57:08,058 INFO L415 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:08,059 INFO L82 PathProgramCache]: Analyzing trace with hash 2143652486, now seen corresponding path program 121 times [2018-07-25 08:57:08,059 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:09,085 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:09,085 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123] total 123 [2018-07-25 08:57:09,085 INFO L451 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-07-25 08:57:09,086 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-07-25 08:57:09,087 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-07-25 08:57:09,087 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 124 states. [2018-07-25 08:57:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:09,193 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-07-25 08:57:09,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-07-25 08:57:09,193 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 124 [2018-07-25 08:57:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:09,193 INFO L225 Difference]: With dead ends: 128 [2018-07-25 08:57:09,193 INFO L226 Difference]: Without dead ends: 126 [2018-07-25 08:57:09,194 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-07-25 08:57:09,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-07-25 08:57:09,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-07-25 08:57:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-07-25 08:57:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-07-25 08:57:09,202 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-07-25 08:57:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:09,202 INFO L472 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-07-25 08:57:09,202 INFO L473 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-07-25 08:57:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-07-25 08:57:09,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-07-25 08:57:09,202 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:09,202 INFO L354 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-07-25 08:57:09,203 INFO L415 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:09,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2028713760, now seen corresponding path program 122 times [2018-07-25 08:57:09,203 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:10,270 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:10,270 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2018-07-25 08:57:10,271 INFO L451 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-07-25 08:57:10,272 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-07-25 08:57:10,272 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-07-25 08:57:10,273 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2018-07-25 08:57:10,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:10,486 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-07-25 08:57:10,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-07-25 08:57:10,487 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2018-07-25 08:57:10,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:10,487 INFO L225 Difference]: With dead ends: 129 [2018-07-25 08:57:10,487 INFO L226 Difference]: Without dead ends: 127 [2018-07-25 08:57:10,488 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-07-25 08:57:10,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-07-25 08:57:10,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-07-25 08:57:10,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-07-25 08:57:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-07-25 08:57:10,496 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-07-25 08:57:10,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:10,496 INFO L472 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-07-25 08:57:10,497 INFO L473 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-07-25 08:57:10,497 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-07-25 08:57:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-07-25 08:57:10,497 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:10,497 INFO L354 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-07-25 08:57:10,497 INFO L415 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:10,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1534386746, now seen corresponding path program 123 times [2018-07-25 08:57:10,498 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:11,467 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:11,468 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125] total 125 [2018-07-25 08:57:11,468 INFO L451 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-07-25 08:57:11,469 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-07-25 08:57:11,470 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-07-25 08:57:11,470 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 126 states. [2018-07-25 08:57:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:11,581 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-07-25 08:57:11,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-07-25 08:57:11,581 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-07-25 08:57:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:11,582 INFO L225 Difference]: With dead ends: 130 [2018-07-25 08:57:11,582 INFO L226 Difference]: Without dead ends: 128 [2018-07-25 08:57:11,583 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-07-25 08:57:11,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-07-25 08:57:11,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-07-25 08:57:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-07-25 08:57:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-07-25 08:57:11,589 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-07-25 08:57:11,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:11,590 INFO L472 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-07-25 08:57:11,590 INFO L473 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-07-25 08:57:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-07-25 08:57:11,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-07-25 08:57:11,590 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:11,590 INFO L354 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-07-25 08:57:11,590 INFO L415 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:11,590 INFO L82 PathProgramCache]: Analyzing trace with hash -321352736, now seen corresponding path program 124 times [2018-07-25 08:57:11,591 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:12,650 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:12,650 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126] total 126 [2018-07-25 08:57:12,650 INFO L451 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-07-25 08:57:12,651 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-07-25 08:57:12,652 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-07-25 08:57:12,652 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 127 states. [2018-07-25 08:57:12,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:12,894 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-07-25 08:57:12,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-07-25 08:57:12,894 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 127 [2018-07-25 08:57:12,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:12,895 INFO L225 Difference]: With dead ends: 131 [2018-07-25 08:57:12,895 INFO L226 Difference]: Without dead ends: 129 [2018-07-25 08:57:12,896 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-07-25 08:57:12,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-07-25 08:57:12,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-07-25 08:57:12,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-07-25 08:57:12,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-07-25 08:57:12,904 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-07-25 08:57:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:12,904 INFO L472 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-07-25 08:57:12,904 INFO L473 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-07-25 08:57:12,904 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-07-25 08:57:12,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-07-25 08:57:12,904 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:12,905 INFO L354 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-07-25 08:57:12,905 INFO L415 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:12,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1372004090, now seen corresponding path program 125 times [2018-07-25 08:57:12,905 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:14,052 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:14,052 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127] total 127 [2018-07-25 08:57:14,053 INFO L451 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-07-25 08:57:14,054 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-07-25 08:57:14,055 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-07-25 08:57:14,055 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 128 states. [2018-07-25 08:57:14,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:14,173 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-07-25 08:57:14,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-07-25 08:57:14,173 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 128 [2018-07-25 08:57:14,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:14,174 INFO L225 Difference]: With dead ends: 132 [2018-07-25 08:57:14,174 INFO L226 Difference]: Without dead ends: 130 [2018-07-25 08:57:14,175 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-07-25 08:57:14,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-07-25 08:57:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-07-25 08:57:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-07-25 08:57:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-07-25 08:57:14,185 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-07-25 08:57:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:14,185 INFO L472 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-07-25 08:57:14,185 INFO L473 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-07-25 08:57:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-07-25 08:57:14,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-07-25 08:57:14,186 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:14,186 INFO L354 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-07-25 08:57:14,186 INFO L415 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:14,186 INFO L82 PathProgramCache]: Analyzing trace with hash 417542304, now seen corresponding path program 126 times [2018-07-25 08:57:14,186 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:15,347 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:15,347 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128] total 128 [2018-07-25 08:57:15,347 INFO L451 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-07-25 08:57:15,349 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-07-25 08:57:15,349 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-07-25 08:57:15,349 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 129 states. [2018-07-25 08:57:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:15,531 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-07-25 08:57:15,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-07-25 08:57:15,531 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 129 [2018-07-25 08:57:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:15,532 INFO L225 Difference]: With dead ends: 133 [2018-07-25 08:57:15,532 INFO L226 Difference]: Without dead ends: 131 [2018-07-25 08:57:15,533 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-07-25 08:57:15,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-07-25 08:57:15,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-07-25 08:57:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-07-25 08:57:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-07-25 08:57:15,539 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-07-25 08:57:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:15,539 INFO L472 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-07-25 08:57:15,539 INFO L473 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-07-25 08:57:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-07-25 08:57:15,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-07-25 08:57:15,540 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:15,540 INFO L354 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-07-25 08:57:15,540 INFO L415 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:15,541 INFO L82 PathProgramCache]: Analyzing trace with hash 58905670, now seen corresponding path program 127 times [2018-07-25 08:57:15,541 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:16,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:16,712 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:16,713 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129] total 129 [2018-07-25 08:57:16,713 INFO L451 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-07-25 08:57:16,714 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-07-25 08:57:16,715 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-07-25 08:57:16,716 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 130 states. [2018-07-25 08:57:16,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:16,837 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-07-25 08:57:16,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-07-25 08:57:16,838 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-07-25 08:57:16,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:16,838 INFO L225 Difference]: With dead ends: 134 [2018-07-25 08:57:16,838 INFO L226 Difference]: Without dead ends: 132 [2018-07-25 08:57:16,840 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-07-25 08:57:16,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-07-25 08:57:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-07-25 08:57:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-07-25 08:57:16,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-07-25 08:57:16,849 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-07-25 08:57:16,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:16,849 INFO L472 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-07-25 08:57:16,849 INFO L473 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-07-25 08:57:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-07-25 08:57:16,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-07-25 08:57:16,850 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:16,850 INFO L354 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-07-25 08:57:16,850 INFO L415 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:16,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1826071904, now seen corresponding path program 128 times [2018-07-25 08:57:16,850 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:18,023 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:18,023 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130] total 130 [2018-07-25 08:57:18,024 INFO L451 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-07-25 08:57:18,025 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-07-25 08:57:18,026 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-07-25 08:57:18,026 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 131 states. [2018-07-25 08:57:18,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:18,219 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-07-25 08:57:18,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-07-25 08:57:18,219 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 131 [2018-07-25 08:57:18,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:18,219 INFO L225 Difference]: With dead ends: 135 [2018-07-25 08:57:18,220 INFO L226 Difference]: Without dead ends: 133 [2018-07-25 08:57:18,221 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-07-25 08:57:18,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-07-25 08:57:18,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-07-25 08:57:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-07-25 08:57:18,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-07-25 08:57:18,228 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-07-25 08:57:18,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:18,229 INFO L472 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-07-25 08:57:18,229 INFO L473 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-07-25 08:57:18,229 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-07-25 08:57:18,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-07-25 08:57:18,229 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:18,230 INFO L354 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-07-25 08:57:18,230 INFO L415 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:18,230 INFO L82 PathProgramCache]: Analyzing trace with hash 773650310, now seen corresponding path program 129 times [2018-07-25 08:57:18,230 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:19,430 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:19,431 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131] total 131 [2018-07-25 08:57:19,431 INFO L451 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-07-25 08:57:19,432 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-07-25 08:57:19,433 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-07-25 08:57:19,433 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 132 states. [2018-07-25 08:57:19,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:19,637 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-07-25 08:57:19,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-07-25 08:57:19,638 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 132 [2018-07-25 08:57:19,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:19,638 INFO L225 Difference]: With dead ends: 136 [2018-07-25 08:57:19,638 INFO L226 Difference]: Without dead ends: 134 [2018-07-25 08:57:19,639 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-07-25 08:57:19,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-07-25 08:57:19,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-07-25 08:57:19,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-07-25 08:57:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-07-25 08:57:19,646 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-07-25 08:57:19,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:19,647 INFO L472 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-07-25 08:57:19,647 INFO L473 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-07-25 08:57:19,647 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-07-25 08:57:19,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-07-25 08:57:19,647 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:19,647 INFO L354 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-07-25 08:57:19,647 INFO L415 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:19,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1786648032, now seen corresponding path program 130 times [2018-07-25 08:57:19,648 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:20,729 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:20,729 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132] total 132 [2018-07-25 08:57:20,729 INFO L451 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-07-25 08:57:20,731 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-07-25 08:57:20,731 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-07-25 08:57:20,731 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 133 states. [2018-07-25 08:57:20,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:20,875 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-07-25 08:57:20,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-07-25 08:57:20,875 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 133 [2018-07-25 08:57:20,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:20,875 INFO L225 Difference]: With dead ends: 137 [2018-07-25 08:57:20,875 INFO L226 Difference]: Without dead ends: 135 [2018-07-25 08:57:20,876 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-07-25 08:57:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-07-25 08:57:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-07-25 08:57:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-07-25 08:57:20,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-07-25 08:57:20,884 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-07-25 08:57:20,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:20,884 INFO L472 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-07-25 08:57:20,884 INFO L473 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-07-25 08:57:20,884 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-07-25 08:57:20,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-07-25 08:57:20,885 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:20,885 INFO L354 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-07-25 08:57:20,885 INFO L415 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:20,885 INFO L82 PathProgramCache]: Analyzing trace with hash 448481990, now seen corresponding path program 131 times [2018-07-25 08:57:20,885 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:21,972 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:21,972 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133] total 133 [2018-07-25 08:57:21,972 INFO L451 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-07-25 08:57:21,974 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-07-25 08:57:21,974 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-07-25 08:57:21,975 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 134 states. [2018-07-25 08:57:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:22,188 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-07-25 08:57:22,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-07-25 08:57:22,188 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-07-25 08:57:22,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:22,189 INFO L225 Difference]: With dead ends: 138 [2018-07-25 08:57:22,189 INFO L226 Difference]: Without dead ends: 136 [2018-07-25 08:57:22,190 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-07-25 08:57:22,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-07-25 08:57:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-07-25 08:57:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-07-25 08:57:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-07-25 08:57:22,201 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-07-25 08:57:22,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:22,201 INFO L472 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-07-25 08:57:22,201 INFO L473 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-07-25 08:57:22,201 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-07-25 08:57:22,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-07-25 08:57:22,202 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:22,202 INFO L354 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-07-25 08:57:22,202 INFO L415 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:22,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1018035936, now seen corresponding path program 132 times [2018-07-25 08:57:22,203 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:23,369 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:23,369 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134] total 134 [2018-07-25 08:57:23,369 INFO L451 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-07-25 08:57:23,371 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-07-25 08:57:23,371 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-07-25 08:57:23,372 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 135 states. [2018-07-25 08:57:23,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:23,597 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-07-25 08:57:23,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-07-25 08:57:23,597 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 135 [2018-07-25 08:57:23,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:23,598 INFO L225 Difference]: With dead ends: 139 [2018-07-25 08:57:23,598 INFO L226 Difference]: Without dead ends: 137 [2018-07-25 08:57:23,599 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-07-25 08:57:23,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-07-25 08:57:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-07-25 08:57:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-07-25 08:57:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-07-25 08:57:23,609 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-07-25 08:57:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:23,609 INFO L472 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-07-25 08:57:23,609 INFO L473 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-07-25 08:57:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-07-25 08:57:23,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-07-25 08:57:23,609 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:23,610 INFO L354 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-07-25 08:57:23,610 INFO L415 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:23,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1494339078, now seen corresponding path program 133 times [2018-07-25 08:57:23,610 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:24,879 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:24,879 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135] total 135 [2018-07-25 08:57:24,879 INFO L451 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-07-25 08:57:24,881 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-07-25 08:57:24,882 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-07-25 08:57:24,882 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 136 states. [2018-07-25 08:57:25,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:25,073 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-07-25 08:57:25,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-07-25 08:57:25,073 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 136 [2018-07-25 08:57:25,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:25,074 INFO L225 Difference]: With dead ends: 140 [2018-07-25 08:57:25,074 INFO L226 Difference]: Without dead ends: 138 [2018-07-25 08:57:25,075 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-07-25 08:57:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-07-25 08:57:25,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-07-25 08:57:25,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-07-25 08:57:25,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-07-25 08:57:25,086 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-07-25 08:57:25,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:25,087 INFO L472 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-07-25 08:57:25,087 INFO L473 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-07-25 08:57:25,087 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-07-25 08:57:25,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-07-25 08:57:25,087 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:25,088 INFO L354 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-07-25 08:57:25,088 INFO L415 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:25,088 INFO L82 PathProgramCache]: Analyzing trace with hash -920132704, now seen corresponding path program 134 times [2018-07-25 08:57:25,088 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:26,417 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:26,417 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136] total 136 [2018-07-25 08:57:26,417 INFO L451 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-07-25 08:57:26,419 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-07-25 08:57:26,420 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-07-25 08:57:26,420 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 137 states. [2018-07-25 08:57:26,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:26,706 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-07-25 08:57:26,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-07-25 08:57:26,706 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 137 [2018-07-25 08:57:26,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:26,707 INFO L225 Difference]: With dead ends: 141 [2018-07-25 08:57:26,707 INFO L226 Difference]: Without dead ends: 139 [2018-07-25 08:57:26,708 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-07-25 08:57:26,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-07-25 08:57:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-07-25 08:57:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-07-25 08:57:26,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-07-25 08:57:26,716 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-07-25 08:57:26,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:26,716 INFO L472 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-07-25 08:57:26,716 INFO L473 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-07-25 08:57:26,717 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-07-25 08:57:26,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-07-25 08:57:26,717 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:26,717 INFO L354 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-07-25 08:57:26,717 INFO L415 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:26,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1540653382, now seen corresponding path program 135 times [2018-07-25 08:57:26,718 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:28,026 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:28,026 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137] total 137 [2018-07-25 08:57:28,026 INFO L451 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-07-25 08:57:28,028 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-07-25 08:57:28,029 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-07-25 08:57:28,029 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 138 states. [2018-07-25 08:57:28,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:28,351 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-07-25 08:57:28,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-07-25 08:57:28,351 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-07-25 08:57:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:28,352 INFO L225 Difference]: With dead ends: 142 [2018-07-25 08:57:28,352 INFO L226 Difference]: Without dead ends: 140 [2018-07-25 08:57:28,353 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-07-25 08:57:28,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-07-25 08:57:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-07-25 08:57:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-07-25 08:57:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-07-25 08:57:28,361 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-07-25 08:57:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:28,361 INFO L472 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-07-25 08:57:28,361 INFO L473 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-07-25 08:57:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-07-25 08:57:28,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-07-25 08:57:28,361 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:28,362 INFO L354 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-07-25 08:57:28,362 INFO L415 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:28,362 INFO L82 PathProgramCache]: Analyzing trace with hash 515610720, now seen corresponding path program 136 times [2018-07-25 08:57:28,362 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:29,670 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:29,671 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138] total 138 [2018-07-25 08:57:29,671 INFO L451 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-07-25 08:57:29,673 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-07-25 08:57:29,673 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-07-25 08:57:29,674 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 139 states. [2018-07-25 08:57:29,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:29,819 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-07-25 08:57:29,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-07-25 08:57:29,819 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 139 [2018-07-25 08:57:29,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:29,820 INFO L225 Difference]: With dead ends: 143 [2018-07-25 08:57:29,820 INFO L226 Difference]: Without dead ends: 141 [2018-07-25 08:57:29,821 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-07-25 08:57:29,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-07-25 08:57:29,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-07-25 08:57:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-07-25 08:57:29,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-07-25 08:57:29,829 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-07-25 08:57:29,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:29,829 INFO L472 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-07-25 08:57:29,829 INFO L473 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-07-25 08:57:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-07-25 08:57:29,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-07-25 08:57:29,830 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:29,830 INFO L354 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-07-25 08:57:29,830 INFO L415 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:29,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1195940730, now seen corresponding path program 137 times [2018-07-25 08:57:29,830 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:31,214 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:31,214 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139] total 139 [2018-07-25 08:57:31,214 INFO L451 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-07-25 08:57:31,215 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-07-25 08:57:31,216 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-07-25 08:57:31,216 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 140 states. [2018-07-25 08:57:31,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:31,491 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-07-25 08:57:31,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-07-25 08:57:31,491 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 140 [2018-07-25 08:57:31,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:31,492 INFO L225 Difference]: With dead ends: 144 [2018-07-25 08:57:31,492 INFO L226 Difference]: Without dead ends: 142 [2018-07-25 08:57:31,493 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-07-25 08:57:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-07-25 08:57:31,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-07-25 08:57:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-07-25 08:57:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-07-25 08:57:31,500 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2018-07-25 08:57:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:31,501 INFO L472 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-07-25 08:57:31,501 INFO L473 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-07-25 08:57:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-07-25 08:57:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-07-25 08:57:31,501 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:31,501 INFO L354 BasicCegarLoop]: trace histogram [138, 1, 1, 1] [2018-07-25 08:57:31,501 INFO L415 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:31,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1580539168, now seen corresponding path program 138 times [2018-07-25 08:57:31,502 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:32,985 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:32,985 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140] total 140 [2018-07-25 08:57:32,985 INFO L451 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-07-25 08:57:32,987 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-07-25 08:57:32,988 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-07-25 08:57:32,988 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 141 states. [2018-07-25 08:57:33,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:33,274 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-07-25 08:57:33,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-07-25 08:57:33,274 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 141 [2018-07-25 08:57:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:33,274 INFO L225 Difference]: With dead ends: 145 [2018-07-25 08:57:33,275 INFO L226 Difference]: Without dead ends: 143 [2018-07-25 08:57:33,276 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-07-25 08:57:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-07-25 08:57:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-07-25 08:57:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-07-25 08:57:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-07-25 08:57:33,283 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2018-07-25 08:57:33,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:33,283 INFO L472 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-07-25 08:57:33,284 INFO L473 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-07-25 08:57:33,284 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-07-25 08:57:33,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-07-25 08:57:33,284 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:33,284 INFO L354 BasicCegarLoop]: trace histogram [139, 1, 1, 1] [2018-07-25 08:57:33,285 INFO L415 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:33,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1752070086, now seen corresponding path program 139 times [2018-07-25 08:57:33,285 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:34,499 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:34,499 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141] total 141 [2018-07-25 08:57:34,499 INFO L451 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-07-25 08:57:34,501 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-07-25 08:57:34,501 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-07-25 08:57:34,502 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 142 states. [2018-07-25 08:57:34,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:34,806 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-07-25 08:57:34,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-07-25 08:57:34,806 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-07-25 08:57:34,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:34,807 INFO L225 Difference]: With dead ends: 146 [2018-07-25 08:57:34,807 INFO L226 Difference]: Without dead ends: 144 [2018-07-25 08:57:34,808 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-07-25 08:57:34,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-07-25 08:57:34,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-07-25 08:57:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-07-25 08:57:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-07-25 08:57:34,820 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2018-07-25 08:57:34,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:34,821 INFO L472 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-07-25 08:57:34,821 INFO L473 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-07-25 08:57:34,821 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-07-25 08:57:34,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-07-25 08:57:34,821 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:34,822 INFO L354 BasicCegarLoop]: trace histogram [140, 1, 1, 1] [2018-07-25 08:57:34,822 INFO L415 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:34,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1520406048, now seen corresponding path program 140 times [2018-07-25 08:57:34,822 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:36,185 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:36,185 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142] total 142 [2018-07-25 08:57:36,185 INFO L451 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-07-25 08:57:36,186 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-07-25 08:57:36,187 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-07-25 08:57:36,187 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 143 states. [2018-07-25 08:57:36,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:36,468 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-07-25 08:57:36,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-07-25 08:57:36,468 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 143 [2018-07-25 08:57:36,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:36,469 INFO L225 Difference]: With dead ends: 147 [2018-07-25 08:57:36,469 INFO L226 Difference]: Without dead ends: 145 [2018-07-25 08:57:36,470 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-07-25 08:57:36,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-07-25 08:57:36,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-07-25 08:57:36,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-07-25 08:57:36,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-07-25 08:57:36,477 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2018-07-25 08:57:36,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:36,477 INFO L472 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-07-25 08:57:36,477 INFO L473 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-07-25 08:57:36,477 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-07-25 08:57:36,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-07-25 08:57:36,478 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:36,478 INFO L354 BasicCegarLoop]: trace histogram [141, 1, 1, 1] [2018-07-25 08:57:36,478 INFO L415 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:36,478 INFO L82 PathProgramCache]: Analyzing trace with hash 112048902, now seen corresponding path program 141 times [2018-07-25 08:57:36,479 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:37,867 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:37,867 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143] total 143 [2018-07-25 08:57:37,868 INFO L451 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-07-25 08:57:37,869 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-07-25 08:57:37,870 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-07-25 08:57:37,870 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 144 states. [2018-07-25 08:57:38,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:38,020 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-07-25 08:57:38,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-07-25 08:57:38,020 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 144 [2018-07-25 08:57:38,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:38,021 INFO L225 Difference]: With dead ends: 148 [2018-07-25 08:57:38,021 INFO L226 Difference]: Without dead ends: 146 [2018-07-25 08:57:38,022 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-07-25 08:57:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-07-25 08:57:38,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-07-25 08:57:38,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-07-25 08:57:38,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-07-25 08:57:38,033 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2018-07-25 08:57:38,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:38,034 INFO L472 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-07-25 08:57:38,034 INFO L473 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-07-25 08:57:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-07-25 08:57:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-07-25 08:57:38,034 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:38,035 INFO L354 BasicCegarLoop]: trace histogram [142, 1, 1, 1] [2018-07-25 08:57:38,035 INFO L415 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:38,035 INFO L82 PathProgramCache]: Analyzing trace with hash -821455200, now seen corresponding path program 142 times [2018-07-25 08:57:38,035 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:39,366 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:39,366 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144] total 144 [2018-07-25 08:57:39,366 INFO L451 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-07-25 08:57:39,367 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-07-25 08:57:39,368 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-07-25 08:57:39,368 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 145 states. [2018-07-25 08:57:39,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:39,504 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-07-25 08:57:39,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-07-25 08:57:39,505 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 145 [2018-07-25 08:57:39,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:39,505 INFO L225 Difference]: With dead ends: 149 [2018-07-25 08:57:39,505 INFO L226 Difference]: Without dead ends: 147 [2018-07-25 08:57:39,506 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-07-25 08:57:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-07-25 08:57:39,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-07-25 08:57:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-07-25 08:57:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-07-25 08:57:39,513 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2018-07-25 08:57:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:39,513 INFO L472 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-07-25 08:57:39,513 INFO L473 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-07-25 08:57:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-07-25 08:57:39,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-07-25 08:57:39,513 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:39,513 INFO L354 BasicCegarLoop]: trace histogram [143, 1, 1, 1] [2018-07-25 08:57:39,514 INFO L415 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:39,514 INFO L82 PathProgramCache]: Analyzing trace with hash 304688710, now seen corresponding path program 143 times [2018-07-25 08:57:39,514 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:40,825 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:40,825 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145] total 145 [2018-07-25 08:57:40,825 INFO L451 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-07-25 08:57:40,827 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-07-25 08:57:40,828 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-07-25 08:57:40,828 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 146 states. [2018-07-25 08:57:41,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:41,135 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-07-25 08:57:41,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-07-25 08:57:41,135 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-07-25 08:57:41,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:41,136 INFO L225 Difference]: With dead ends: 150 [2018-07-25 08:57:41,136 INFO L226 Difference]: Without dead ends: 148 [2018-07-25 08:57:41,137 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-07-25 08:57:41,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-07-25 08:57:41,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-07-25 08:57:41,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-07-25 08:57:41,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-07-25 08:57:41,144 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2018-07-25 08:57:41,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:41,144 INFO L472 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-07-25 08:57:41,144 INFO L473 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-07-25 08:57:41,144 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-07-25 08:57:41,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-07-25 08:57:41,145 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:41,145 INFO L354 BasicCegarLoop]: trace histogram [144, 1, 1, 1] [2018-07-25 08:57:41,145 INFO L415 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:41,145 INFO L82 PathProgramCache]: Analyzing trace with hash 855411552, now seen corresponding path program 144 times [2018-07-25 08:57:41,145 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:42,472 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:42,472 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146] total 146 [2018-07-25 08:57:42,472 INFO L451 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-07-25 08:57:42,474 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-07-25 08:57:42,475 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-07-25 08:57:42,475 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 147 states. [2018-07-25 08:57:42,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:42,799 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-07-25 08:57:42,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-07-25 08:57:42,799 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 147 [2018-07-25 08:57:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:42,799 INFO L225 Difference]: With dead ends: 151 [2018-07-25 08:57:42,799 INFO L226 Difference]: Without dead ends: 149 [2018-07-25 08:57:42,800 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-07-25 08:57:42,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-07-25 08:57:42,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-07-25 08:57:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-07-25 08:57:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-07-25 08:57:42,809 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2018-07-25 08:57:42,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:42,809 INFO L472 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-07-25 08:57:42,809 INFO L473 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-07-25 08:57:42,809 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-07-25 08:57:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-07-25 08:57:42,809 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:42,809 INFO L354 BasicCegarLoop]: trace histogram [145, 1, 1, 1] [2018-07-25 08:57:42,810 INFO L415 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:42,810 INFO L82 PathProgramCache]: Analyzing trace with hash 747950470, now seen corresponding path program 145 times [2018-07-25 08:57:42,810 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:44,138 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:44,138 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147] total 147 [2018-07-25 08:57:44,138 INFO L451 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-07-25 08:57:44,140 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-07-25 08:57:44,140 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-07-25 08:57:44,141 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 148 states. [2018-07-25 08:57:44,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:44,461 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-07-25 08:57:44,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-07-25 08:57:44,461 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 148 [2018-07-25 08:57:44,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:44,461 INFO L225 Difference]: With dead ends: 152 [2018-07-25 08:57:44,462 INFO L226 Difference]: Without dead ends: 150 [2018-07-25 08:57:44,462 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-07-25 08:57:44,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-07-25 08:57:44,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-07-25 08:57:44,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-07-25 08:57:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-07-25 08:57:44,470 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 148 [2018-07-25 08:57:44,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:44,470 INFO L472 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-07-25 08:57:44,470 INFO L473 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-07-25 08:57:44,470 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-07-25 08:57:44,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-07-25 08:57:44,471 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:44,471 INFO L354 BasicCegarLoop]: trace histogram [146, 1, 1, 1] [2018-07-25 08:57:44,471 INFO L415 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:44,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1711624224, now seen corresponding path program 146 times [2018-07-25 08:57:44,472 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:45,951 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:45,951 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148] total 148 [2018-07-25 08:57:45,951 INFO L451 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-07-25 08:57:45,953 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-07-25 08:57:45,954 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-07-25 08:57:45,954 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 149 states. [2018-07-25 08:57:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:46,346 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-07-25 08:57:46,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-07-25 08:57:46,346 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 149 [2018-07-25 08:57:46,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:46,347 INFO L225 Difference]: With dead ends: 153 [2018-07-25 08:57:46,347 INFO L226 Difference]: Without dead ends: 151 [2018-07-25 08:57:46,348 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-07-25 08:57:46,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-07-25 08:57:46,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-07-25 08:57:46,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-07-25 08:57:46,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-07-25 08:57:46,360 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 149 [2018-07-25 08:57:46,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:46,360 INFO L472 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-07-25 08:57:46,360 INFO L473 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-07-25 08:57:46,361 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-07-25 08:57:46,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-07-25 08:57:46,361 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:46,361 INFO L354 BasicCegarLoop]: trace histogram [147, 1, 1, 1] [2018-07-25 08:57:46,361 INFO L415 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:46,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1520739526, now seen corresponding path program 147 times [2018-07-25 08:57:46,362 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:47,820 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:47,820 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149] total 149 [2018-07-25 08:57:47,820 INFO L451 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-07-25 08:57:47,822 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-07-25 08:57:47,823 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-07-25 08:57:47,823 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 150 states. [2018-07-25 08:57:48,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:48,217 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-07-25 08:57:48,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-07-25 08:57:48,217 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-07-25 08:57:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:48,218 INFO L225 Difference]: With dead ends: 154 [2018-07-25 08:57:48,218 INFO L226 Difference]: Without dead ends: 152 [2018-07-25 08:57:48,219 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-07-25 08:57:48,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-07-25 08:57:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-07-25 08:57:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-07-25 08:57:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-07-25 08:57:48,226 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 150 [2018-07-25 08:57:48,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:48,226 INFO L472 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-07-25 08:57:48,226 INFO L473 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-07-25 08:57:48,227 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-07-25 08:57:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-07-25 08:57:48,227 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:48,227 INFO L354 BasicCegarLoop]: trace histogram [148, 1, 1, 1] [2018-07-25 08:57:48,227 INFO L415 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:48,228 INFO L82 PathProgramCache]: Analyzing trace with hash -101718816, now seen corresponding path program 148 times [2018-07-25 08:57:48,228 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:49,694 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:49,694 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150] total 150 [2018-07-25 08:57:49,695 INFO L451 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-07-25 08:57:49,696 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-07-25 08:57:49,697 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-07-25 08:57:49,697 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 151 states. [2018-07-25 08:57:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:50,096 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-07-25 08:57:50,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-07-25 08:57:50,096 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 151 [2018-07-25 08:57:50,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:50,096 INFO L225 Difference]: With dead ends: 155 [2018-07-25 08:57:50,096 INFO L226 Difference]: Without dead ends: 153 [2018-07-25 08:57:50,097 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-07-25 08:57:50,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-07-25 08:57:50,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-07-25 08:57:50,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-07-25 08:57:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-07-25 08:57:50,105 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 151 [2018-07-25 08:57:50,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:50,105 INFO L472 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-07-25 08:57:50,106 INFO L473 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-07-25 08:57:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-07-25 08:57:50,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-07-25 08:57:50,106 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:50,106 INFO L354 BasicCegarLoop]: trace histogram [149, 1, 1, 1] [2018-07-25 08:57:50,106 INFO L415 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:50,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1141680134, now seen corresponding path program 149 times [2018-07-25 08:57:50,106 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:51,519 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:51,519 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151] total 151 [2018-07-25 08:57:51,519 INFO L451 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-07-25 08:57:51,521 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-07-25 08:57:51,521 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-07-25 08:57:51,522 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 152 states. [2018-07-25 08:57:51,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:51,888 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2018-07-25 08:57:51,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-07-25 08:57:51,888 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 152 [2018-07-25 08:57:51,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:51,889 INFO L225 Difference]: With dead ends: 156 [2018-07-25 08:57:51,889 INFO L226 Difference]: Without dead ends: 154 [2018-07-25 08:57:51,889 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-07-25 08:57:51,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-07-25 08:57:51,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-07-25 08:57:51,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-07-25 08:57:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-07-25 08:57:51,897 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 152 [2018-07-25 08:57:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:51,897 INFO L472 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-07-25 08:57:51,897 INFO L473 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-07-25 08:57:51,897 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-07-25 08:57:51,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-07-25 08:57:51,897 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:51,897 INFO L354 BasicCegarLoop]: trace histogram [150, 1, 1, 1] [2018-07-25 08:57:51,898 INFO L415 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:51,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1032341920, now seen corresponding path program 150 times [2018-07-25 08:57:51,898 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:53,289 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:53,289 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152] total 152 [2018-07-25 08:57:53,289 INFO L451 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-07-25 08:57:53,291 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-07-25 08:57:53,292 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-07-25 08:57:53,292 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 153 states. [2018-07-25 08:57:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:53,773 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-07-25 08:57:53,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-07-25 08:57:53,773 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 153 [2018-07-25 08:57:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:53,774 INFO L225 Difference]: With dead ends: 157 [2018-07-25 08:57:53,774 INFO L226 Difference]: Without dead ends: 155 [2018-07-25 08:57:53,775 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-07-25 08:57:53,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-07-25 08:57:53,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-07-25 08:57:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-07-25 08:57:53,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-07-25 08:57:53,783 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 153 [2018-07-25 08:57:53,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:53,783 INFO L472 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-07-25 08:57:53,783 INFO L473 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-07-25 08:57:53,784 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-07-25 08:57:53,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-07-25 08:57:53,784 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:53,784 INFO L354 BasicCegarLoop]: trace histogram [151, 1, 1, 1] [2018-07-25 08:57:53,784 INFO L415 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:53,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1937824582, now seen corresponding path program 151 times [2018-07-25 08:57:53,784 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:55,399 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:55,399 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153] total 153 [2018-07-25 08:57:55,399 INFO L451 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-07-25 08:57:55,400 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-07-25 08:57:55,400 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-07-25 08:57:55,401 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 154 states. [2018-07-25 08:57:55,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:55,770 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-07-25 08:57:55,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-07-25 08:57:55,770 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-07-25 08:57:55,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:55,770 INFO L225 Difference]: With dead ends: 158 [2018-07-25 08:57:55,770 INFO L226 Difference]: Without dead ends: 156 [2018-07-25 08:57:55,771 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-07-25 08:57:55,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-07-25 08:57:55,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-07-25 08:57:55,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-07-25 08:57:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-07-25 08:57:55,778 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 154 [2018-07-25 08:57:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:55,779 INFO L472 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-07-25 08:57:55,779 INFO L473 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-07-25 08:57:55,779 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-07-25 08:57:55,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-07-25 08:57:55,779 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:55,779 INFO L354 BasicCegarLoop]: trace histogram [152, 1, 1, 1] [2018-07-25 08:57:55,779 INFO L415 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:55,780 INFO L82 PathProgramCache]: Analyzing trace with hash -56983968, now seen corresponding path program 152 times [2018-07-25 08:57:55,780 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:57,293 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:57,293 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154] total 154 [2018-07-25 08:57:57,294 INFO L451 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-07-25 08:57:57,295 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-07-25 08:57:57,296 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-07-25 08:57:57,296 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 155 states. [2018-07-25 08:57:57,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:57,698 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-07-25 08:57:57,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-07-25 08:57:57,698 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 155 [2018-07-25 08:57:57,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:57,699 INFO L225 Difference]: With dead ends: 159 [2018-07-25 08:57:57,699 INFO L226 Difference]: Without dead ends: 157 [2018-07-25 08:57:57,700 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-07-25 08:57:57,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-07-25 08:57:57,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-07-25 08:57:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-07-25 08:57:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-07-25 08:57:57,711 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 155 [2018-07-25 08:57:57,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:57,712 INFO L472 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-07-25 08:57:57,712 INFO L473 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-07-25 08:57:57,712 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-07-25 08:57:57,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-07-25 08:57:57,713 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:57,713 INFO L354 BasicCegarLoop]: trace histogram [153, 1, 1, 1] [2018-07-25 08:57:57,713 INFO L415 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:57,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1766506874, now seen corresponding path program 153 times [2018-07-25 08:57:57,713 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:57:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:57:59,336 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:57:59,336 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155] total 155 [2018-07-25 08:57:59,336 INFO L451 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-07-25 08:57:59,337 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-07-25 08:57:59,337 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-07-25 08:57:59,338 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 156 states. [2018-07-25 08:57:59,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:57:59,712 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-07-25 08:57:59,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-07-25 08:57:59,712 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 156 [2018-07-25 08:57:59,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:57:59,712 INFO L225 Difference]: With dead ends: 160 [2018-07-25 08:57:59,712 INFO L226 Difference]: Without dead ends: 158 [2018-07-25 08:57:59,713 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-07-25 08:57:59,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-07-25 08:57:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-07-25 08:57:59,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-07-25 08:57:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-07-25 08:57:59,720 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 156 [2018-07-25 08:57:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:57:59,721 INFO L472 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-07-25 08:57:59,721 INFO L473 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-07-25 08:57:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-07-25 08:57:59,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-07-25 08:57:59,721 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:57:59,721 INFO L354 BasicCegarLoop]: trace histogram [154, 1, 1, 1] [2018-07-25 08:57:59,722 INFO L415 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:57:59,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1072857888, now seen corresponding path program 154 times [2018-07-25 08:57:59,722 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:57:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:01,154 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:01,154 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156] total 156 [2018-07-25 08:58:01,154 INFO L451 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-07-25 08:58:01,156 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-07-25 08:58:01,156 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-07-25 08:58:01,157 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 157 states. [2018-07-25 08:58:01,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:01,500 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-07-25 08:58:01,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-07-25 08:58:01,500 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 157 [2018-07-25 08:58:01,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:01,501 INFO L225 Difference]: With dead ends: 161 [2018-07-25 08:58:01,501 INFO L226 Difference]: Without dead ends: 159 [2018-07-25 08:58:01,502 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-07-25 08:58:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-07-25 08:58:01,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-07-25 08:58:01,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-07-25 08:58:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-07-25 08:58:01,509 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 157 [2018-07-25 08:58:01,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:01,510 INFO L472 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-07-25 08:58:01,510 INFO L473 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-07-25 08:58:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-07-25 08:58:01,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-07-25 08:58:01,510 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:01,510 INFO L354 BasicCegarLoop]: trace histogram [155, 1, 1, 1] [2018-07-25 08:58:01,510 INFO L415 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:01,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1101147706, now seen corresponding path program 155 times [2018-07-25 08:58:01,511 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:03,040 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:03,040 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157] total 157 [2018-07-25 08:58:03,041 INFO L451 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-07-25 08:58:03,041 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-07-25 08:58:03,042 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-07-25 08:58:03,042 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 158 states. [2018-07-25 08:58:03,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:03,239 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-07-25 08:58:03,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-07-25 08:58:03,239 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 158 [2018-07-25 08:58:03,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:03,240 INFO L225 Difference]: With dead ends: 162 [2018-07-25 08:58:03,240 INFO L226 Difference]: Without dead ends: 160 [2018-07-25 08:58:03,240 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-07-25 08:58:03,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-07-25 08:58:03,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-07-25 08:58:03,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-07-25 08:58:03,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-07-25 08:58:03,252 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 158 [2018-07-25 08:58:03,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:03,252 INFO L472 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-07-25 08:58:03,252 INFO L473 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-07-25 08:58:03,252 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-07-25 08:58:03,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-07-25 08:58:03,252 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:03,252 INFO L354 BasicCegarLoop]: trace histogram [156, 1, 1, 1] [2018-07-25 08:58:03,253 INFO L415 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:03,253 INFO L82 PathProgramCache]: Analyzing trace with hash 224155616, now seen corresponding path program 156 times [2018-07-25 08:58:03,253 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:04,737 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:04,737 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158] total 158 [2018-07-25 08:58:04,737 INFO L451 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-07-25 08:58:04,739 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-07-25 08:58:04,740 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-07-25 08:58:04,740 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 159 states. [2018-07-25 08:58:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:04,911 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-07-25 08:58:04,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-07-25 08:58:04,911 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 159 [2018-07-25 08:58:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:04,912 INFO L225 Difference]: With dead ends: 163 [2018-07-25 08:58:04,912 INFO L226 Difference]: Without dead ends: 161 [2018-07-25 08:58:04,913 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-07-25 08:58:04,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-07-25 08:58:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-07-25 08:58:04,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-07-25 08:58:04,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-07-25 08:58:04,921 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 159 [2018-07-25 08:58:04,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:04,921 INFO L472 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-07-25 08:58:04,921 INFO L473 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-07-25 08:58:04,921 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-07-25 08:58:04,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-07-25 08:58:04,922 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:04,922 INFO L354 BasicCegarLoop]: trace histogram [157, 1, 1, 1] [2018-07-25 08:58:04,922 INFO L415 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:04,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1641114362, now seen corresponding path program 157 times [2018-07-25 08:58:04,922 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:06,490 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:06,490 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159] total 159 [2018-07-25 08:58:06,490 INFO L451 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-07-25 08:58:06,492 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-07-25 08:58:06,493 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-07-25 08:58:06,493 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 160 states. [2018-07-25 08:58:06,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:06,847 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2018-07-25 08:58:06,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-07-25 08:58:06,847 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 160 [2018-07-25 08:58:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:06,848 INFO L225 Difference]: With dead ends: 164 [2018-07-25 08:58:06,848 INFO L226 Difference]: Without dead ends: 162 [2018-07-25 08:58:06,849 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-07-25 08:58:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-07-25 08:58:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-07-25 08:58:06,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-07-25 08:58:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-07-25 08:58:06,857 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 160 [2018-07-25 08:58:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:06,857 INFO L472 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-07-25 08:58:06,857 INFO L473 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-07-25 08:58:06,857 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-07-25 08:58:06,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-07-25 08:58:06,857 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:06,858 INFO L354 BasicCegarLoop]: trace histogram [158, 1, 1, 1] [2018-07-25 08:58:06,858 INFO L415 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:06,858 INFO L82 PathProgramCache]: Analyzing trace with hash 665058464, now seen corresponding path program 158 times [2018-07-25 08:58:06,858 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:08,477 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:08,477 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160] total 160 [2018-07-25 08:58:08,477 INFO L451 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-07-25 08:58:08,480 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-07-25 08:58:08,481 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-07-25 08:58:08,481 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 161 states. [2018-07-25 08:58:09,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:09,114 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-07-25 08:58:09,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-07-25 08:58:09,114 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 161 [2018-07-25 08:58:09,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:09,114 INFO L225 Difference]: With dead ends: 165 [2018-07-25 08:58:09,114 INFO L226 Difference]: Without dead ends: 163 [2018-07-25 08:58:09,116 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-07-25 08:58:09,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-07-25 08:58:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-07-25 08:58:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-07-25 08:58:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-07-25 08:58:09,125 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 161 [2018-07-25 08:58:09,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:09,125 INFO L472 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-07-25 08:58:09,126 INFO L473 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-07-25 08:58:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-07-25 08:58:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-07-25 08:58:09,126 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:09,126 INFO L354 BasicCegarLoop]: trace histogram [159, 1, 1, 1] [2018-07-25 08:58:09,126 INFO L415 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:09,126 INFO L82 PathProgramCache]: Analyzing trace with hash -858027962, now seen corresponding path program 159 times [2018-07-25 08:58:09,127 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:10,896 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:10,896 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161] total 161 [2018-07-25 08:58:10,896 INFO L451 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-07-25 08:58:10,899 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-07-25 08:58:10,900 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-07-25 08:58:10,900 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 162 states. [2018-07-25 08:58:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:11,443 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-07-25 08:58:11,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-07-25 08:58:11,443 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 162 [2018-07-25 08:58:11,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:11,444 INFO L225 Difference]: With dead ends: 166 [2018-07-25 08:58:11,444 INFO L226 Difference]: Without dead ends: 164 [2018-07-25 08:58:11,445 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-07-25 08:58:11,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-07-25 08:58:11,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-07-25 08:58:11,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-07-25 08:58:11,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-07-25 08:58:11,457 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 162 [2018-07-25 08:58:11,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:11,457 INFO L472 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-07-25 08:58:11,457 INFO L473 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-07-25 08:58:11,457 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-07-25 08:58:11,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-07-25 08:58:11,458 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:11,458 INFO L354 BasicCegarLoop]: trace histogram [160, 1, 1, 1] [2018-07-25 08:58:11,458 INFO L415 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:11,458 INFO L82 PathProgramCache]: Analyzing trace with hash -829066912, now seen corresponding path program 160 times [2018-07-25 08:58:11,459 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:13,202 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:13,202 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [162] total 162 [2018-07-25 08:58:13,202 INFO L451 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-07-25 08:58:13,204 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-07-25 08:58:13,205 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-07-25 08:58:13,205 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 163 states. [2018-07-25 08:58:13,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:13,712 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-07-25 08:58:13,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-07-25 08:58:13,712 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 163 [2018-07-25 08:58:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:13,713 INFO L225 Difference]: With dead ends: 167 [2018-07-25 08:58:13,713 INFO L226 Difference]: Without dead ends: 165 [2018-07-25 08:58:13,715 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-07-25 08:58:13,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-07-25 08:58:13,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-07-25 08:58:13,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-07-25 08:58:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-07-25 08:58:13,723 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 163 [2018-07-25 08:58:13,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:13,724 INFO L472 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-07-25 08:58:13,724 INFO L473 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-07-25 08:58:13,724 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-07-25 08:58:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-07-25 08:58:13,724 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:13,724 INFO L354 BasicCegarLoop]: trace histogram [161, 1, 1, 1] [2018-07-25 08:58:13,724 INFO L415 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:13,725 INFO L82 PathProgramCache]: Analyzing trace with hash 68725638, now seen corresponding path program 161 times [2018-07-25 08:58:13,725 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:15,588 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:15,588 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163] total 163 [2018-07-25 08:58:15,588 INFO L451 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-07-25 08:58:15,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-07-25 08:58:15,590 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-07-25 08:58:15,590 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 164 states. [2018-07-25 08:58:15,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:15,776 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2018-07-25 08:58:15,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-07-25 08:58:15,776 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 164 [2018-07-25 08:58:15,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:15,776 INFO L225 Difference]: With dead ends: 168 [2018-07-25 08:58:15,777 INFO L226 Difference]: Without dead ends: 166 [2018-07-25 08:58:15,777 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-07-25 08:58:15,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-07-25 08:58:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-07-25 08:58:15,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-07-25 08:58:15,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-07-25 08:58:15,790 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 164 [2018-07-25 08:58:15,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:15,791 INFO L472 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-07-25 08:58:15,791 INFO L473 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-07-25 08:58:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-07-25 08:58:15,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-07-25 08:58:15,792 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:15,792 INFO L354 BasicCegarLoop]: trace histogram [162, 1, 1, 1] [2018-07-25 08:58:15,792 INFO L415 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:15,792 INFO L82 PathProgramCache]: Analyzing trace with hash 2130490912, now seen corresponding path program 162 times [2018-07-25 08:58:15,792 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:17,715 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:17,715 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164] total 164 [2018-07-25 08:58:17,715 INFO L451 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-07-25 08:58:17,717 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-07-25 08:58:17,718 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-07-25 08:58:17,718 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 165 states. [2018-07-25 08:58:18,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:18,172 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-07-25 08:58:18,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-07-25 08:58:18,172 INFO L78 Accepts]: Start accepts. Automaton has 165 states. Word has length 165 [2018-07-25 08:58:18,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:18,173 INFO L225 Difference]: With dead ends: 169 [2018-07-25 08:58:18,173 INFO L226 Difference]: Without dead ends: 167 [2018-07-25 08:58:18,174 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-07-25 08:58:18,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-07-25 08:58:18,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-07-25 08:58:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-07-25 08:58:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-07-25 08:58:18,182 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 165 [2018-07-25 08:58:18,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:18,182 INFO L472 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-07-25 08:58:18,183 INFO L473 AbstractCegarLoop]: Interpolant automaton has 165 states. [2018-07-25 08:58:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-07-25 08:58:18,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-07-25 08:58:18,183 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:18,183 INFO L354 BasicCegarLoop]: trace histogram [163, 1, 1, 1] [2018-07-25 08:58:18,183 INFO L415 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:18,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1620704966, now seen corresponding path program 163 times [2018-07-25 08:58:18,183 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:19,934 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:19,934 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165] total 165 [2018-07-25 08:58:19,934 INFO L451 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-07-25 08:58:19,935 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-07-25 08:58:19,936 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-07-25 08:58:19,936 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 166 states. [2018-07-25 08:58:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:20,438 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-07-25 08:58:20,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-07-25 08:58:20,438 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 166 [2018-07-25 08:58:20,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:20,438 INFO L225 Difference]: With dead ends: 170 [2018-07-25 08:58:20,438 INFO L226 Difference]: Without dead ends: 168 [2018-07-25 08:58:20,439 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-07-25 08:58:20,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-07-25 08:58:20,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-07-25 08:58:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-07-25 08:58:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-07-25 08:58:20,447 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 166 [2018-07-25 08:58:20,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:20,447 INFO L472 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-07-25 08:58:20,447 INFO L473 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-07-25 08:58:20,447 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-07-25 08:58:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-07-25 08:58:20,448 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:20,448 INFO L354 BasicCegarLoop]: trace histogram [164, 1, 1, 1] [2018-07-25 08:58:20,448 INFO L415 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:20,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1297757472, now seen corresponding path program 164 times [2018-07-25 08:58:20,448 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:22,073 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:22,073 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [166] total 166 [2018-07-25 08:58:22,074 INFO L451 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-07-25 08:58:22,076 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-07-25 08:58:22,077 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-07-25 08:58:22,077 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 167 states. [2018-07-25 08:58:22,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:22,414 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-07-25 08:58:22,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-07-25 08:58:22,414 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 167 [2018-07-25 08:58:22,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:22,415 INFO L225 Difference]: With dead ends: 171 [2018-07-25 08:58:22,415 INFO L226 Difference]: Without dead ends: 169 [2018-07-25 08:58:22,416 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-07-25 08:58:22,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-07-25 08:58:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-07-25 08:58:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-07-25 08:58:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-07-25 08:58:22,424 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 167 [2018-07-25 08:58:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:22,425 INFO L472 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-07-25 08:58:22,425 INFO L473 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-07-25 08:58:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-07-25 08:58:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-07-25 08:58:22,425 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:22,425 INFO L354 BasicCegarLoop]: trace histogram [165, 1, 1, 1] [2018-07-25 08:58:22,425 INFO L415 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:22,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1575779834, now seen corresponding path program 165 times [2018-07-25 08:58:22,426 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:24,181 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:24,182 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167] total 167 [2018-07-25 08:58:24,182 INFO L451 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-07-25 08:58:24,183 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-07-25 08:58:24,184 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-07-25 08:58:24,184 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 168 states. [2018-07-25 08:58:24,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:24,520 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-07-25 08:58:24,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-07-25 08:58:24,520 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 168 [2018-07-25 08:58:24,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:24,521 INFO L225 Difference]: With dead ends: 172 [2018-07-25 08:58:24,521 INFO L226 Difference]: Without dead ends: 170 [2018-07-25 08:58:24,522 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-07-25 08:58:24,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-07-25 08:58:24,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-07-25 08:58:24,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-07-25 08:58:24,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-07-25 08:58:24,531 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 168 [2018-07-25 08:58:24,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:24,531 INFO L472 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-07-25 08:58:24,531 INFO L473 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-07-25 08:58:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-07-25 08:58:24,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-07-25 08:58:24,531 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:24,532 INFO L354 BasicCegarLoop]: trace histogram [166, 1, 1, 1] [2018-07-25 08:58:24,532 INFO L415 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:24,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1604538464, now seen corresponding path program 166 times [2018-07-25 08:58:24,532 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:26,413 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:26,413 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [168] total 168 [2018-07-25 08:58:26,414 INFO L451 AbstractCegarLoop]: Interpolant automaton has 169 states [2018-07-25 08:58:26,416 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2018-07-25 08:58:26,417 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-07-25 08:58:26,418 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 169 states. [2018-07-25 08:58:27,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:27,057 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-07-25 08:58:27,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2018-07-25 08:58:27,057 INFO L78 Accepts]: Start accepts. Automaton has 169 states. Word has length 169 [2018-07-25 08:58:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:27,058 INFO L225 Difference]: With dead ends: 173 [2018-07-25 08:58:27,058 INFO L226 Difference]: Without dead ends: 171 [2018-07-25 08:58:27,059 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-07-25 08:58:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-07-25 08:58:27,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-07-25 08:58:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-07-25 08:58:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-07-25 08:58:27,067 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 169 [2018-07-25 08:58:27,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:27,067 INFO L472 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-07-25 08:58:27,067 INFO L473 AbstractCegarLoop]: Interpolant automaton has 169 states. [2018-07-25 08:58:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-07-25 08:58:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-07-25 08:58:27,068 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:27,068 INFO L354 BasicCegarLoop]: trace histogram [167, 1, 1, 1] [2018-07-25 08:58:27,068 INFO L415 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:27,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1798911302, now seen corresponding path program 167 times [2018-07-25 08:58:27,068 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:28,882 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:28,882 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [169] total 169 [2018-07-25 08:58:28,882 INFO L451 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-07-25 08:58:28,884 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-07-25 08:58:28,885 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-07-25 08:58:28,885 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 170 states. [2018-07-25 08:58:29,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:29,370 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2018-07-25 08:58:29,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2018-07-25 08:58:29,370 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 170 [2018-07-25 08:58:29,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:29,370 INFO L225 Difference]: With dead ends: 174 [2018-07-25 08:58:29,370 INFO L226 Difference]: Without dead ends: 172 [2018-07-25 08:58:29,372 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-07-25 08:58:29,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-07-25 08:58:29,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-07-25 08:58:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-07-25 08:58:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-07-25 08:58:29,380 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 170 [2018-07-25 08:58:29,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:29,381 INFO L472 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-07-25 08:58:29,381 INFO L473 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-07-25 08:58:29,381 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-07-25 08:58:29,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-07-25 08:58:29,381 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:29,381 INFO L354 BasicCegarLoop]: trace histogram [168, 1, 1, 1] [2018-07-25 08:58:29,381 INFO L415 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:29,382 INFO L82 PathProgramCache]: Analyzing trace with hash -68328352, now seen corresponding path program 168 times [2018-07-25 08:58:29,382 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:31,137 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:31,137 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [170] total 170 [2018-07-25 08:58:31,137 INFO L451 AbstractCegarLoop]: Interpolant automaton has 171 states [2018-07-25 08:58:31,139 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2018-07-25 08:58:31,140 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-07-25 08:58:31,141 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 171 states. [2018-07-25 08:58:31,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:31,581 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-07-25 08:58:31,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2018-07-25 08:58:31,581 INFO L78 Accepts]: Start accepts. Automaton has 171 states. Word has length 171 [2018-07-25 08:58:31,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:31,582 INFO L225 Difference]: With dead ends: 175 [2018-07-25 08:58:31,582 INFO L226 Difference]: Without dead ends: 173 [2018-07-25 08:58:31,584 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-07-25 08:58:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-07-25 08:58:31,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-07-25 08:58:31,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-07-25 08:58:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-07-25 08:58:31,592 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 171 [2018-07-25 08:58:31,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:31,593 INFO L472 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-07-25 08:58:31,593 INFO L473 AbstractCegarLoop]: Interpolant automaton has 171 states. [2018-07-25 08:58:31,593 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-07-25 08:58:31,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-07-25 08:58:31,593 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:31,593 INFO L354 BasicCegarLoop]: trace histogram [169, 1, 1, 1] [2018-07-25 08:58:31,593 INFO L415 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:31,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2118182778, now seen corresponding path program 169 times [2018-07-25 08:58:31,594 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:33,419 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:33,419 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [171] total 171 [2018-07-25 08:58:33,420 INFO L451 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-07-25 08:58:33,422 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-07-25 08:58:33,423 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-07-25 08:58:33,423 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 172 states. [2018-07-25 08:58:34,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:34,191 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2018-07-25 08:58:34,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2018-07-25 08:58:34,192 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 172 [2018-07-25 08:58:34,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:34,192 INFO L225 Difference]: With dead ends: 176 [2018-07-25 08:58:34,192 INFO L226 Difference]: Without dead ends: 174 [2018-07-25 08:58:34,194 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-07-25 08:58:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-07-25 08:58:34,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-07-25 08:58:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-07-25 08:58:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-07-25 08:58:34,203 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 172 [2018-07-25 08:58:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:34,203 INFO L472 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-07-25 08:58:34,203 INFO L473 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-07-25 08:58:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-07-25 08:58:34,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-07-25 08:58:34,203 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:34,204 INFO L354 BasicCegarLoop]: trace histogram [170, 1, 1, 1] [2018-07-25 08:58:34,204 INFO L415 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:34,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1239160544, now seen corresponding path program 170 times [2018-07-25 08:58:34,204 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 0 proven. 14535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:36,232 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:36,232 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [172] total 172 [2018-07-25 08:58:36,233 INFO L451 AbstractCegarLoop]: Interpolant automaton has 173 states [2018-07-25 08:58:36,234 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2018-07-25 08:58:36,235 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-07-25 08:58:36,236 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 173 states. [2018-07-25 08:58:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:36,435 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-07-25 08:58:36,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2018-07-25 08:58:36,435 INFO L78 Accepts]: Start accepts. Automaton has 173 states. Word has length 173 [2018-07-25 08:58:36,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:36,435 INFO L225 Difference]: With dead ends: 177 [2018-07-25 08:58:36,436 INFO L226 Difference]: Without dead ends: 175 [2018-07-25 08:58:36,436 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-07-25 08:58:36,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-07-25 08:58:36,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-07-25 08:58:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-07-25 08:58:36,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-07-25 08:58:36,446 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 173 [2018-07-25 08:58:36,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:36,446 INFO L472 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-07-25 08:58:36,446 INFO L473 AbstractCegarLoop]: Interpolant automaton has 173 states. [2018-07-25 08:58:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-07-25 08:58:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-07-25 08:58:36,447 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:36,447 INFO L354 BasicCegarLoop]: trace histogram [171, 1, 1, 1] [2018-07-25 08:58:36,447 INFO L415 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:36,447 INFO L82 PathProgramCache]: Analyzing trace with hash 240724934, now seen corresponding path program 171 times [2018-07-25 08:58:36,447 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:38,271 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:38,271 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [173] total 173 [2018-07-25 08:58:38,271 INFO L451 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-07-25 08:58:38,274 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-07-25 08:58:38,275 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-07-25 08:58:38,276 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 174 states. [2018-07-25 08:58:39,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:39,163 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-07-25 08:58:39,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2018-07-25 08:58:39,163 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 174 [2018-07-25 08:58:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:39,164 INFO L225 Difference]: With dead ends: 178 [2018-07-25 08:58:39,164 INFO L226 Difference]: Without dead ends: 176 [2018-07-25 08:58:39,165 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-07-25 08:58:39,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-07-25 08:58:39,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-07-25 08:58:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-07-25 08:58:39,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-07-25 08:58:39,175 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 174 [2018-07-25 08:58:39,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:39,175 INFO L472 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-07-25 08:58:39,175 INFO L473 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-07-25 08:58:39,175 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-07-25 08:58:39,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-07-25 08:58:39,176 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:39,176 INFO L354 BasicCegarLoop]: trace histogram [172, 1, 1, 1] [2018-07-25 08:58:39,176 INFO L415 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:39,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1127465504, now seen corresponding path program 172 times [2018-07-25 08:58:39,176 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 0 proven. 14878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:41,221 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:41,221 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [174] total 174 [2018-07-25 08:58:41,221 INFO L451 AbstractCegarLoop]: Interpolant automaton has 175 states [2018-07-25 08:58:41,223 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2018-07-25 08:58:41,224 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-07-25 08:58:41,224 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 175 states. [2018-07-25 08:58:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:41,640 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-07-25 08:58:41,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2018-07-25 08:58:41,640 INFO L78 Accepts]: Start accepts. Automaton has 175 states. Word has length 175 [2018-07-25 08:58:41,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:41,641 INFO L225 Difference]: With dead ends: 179 [2018-07-25 08:58:41,641 INFO L226 Difference]: Without dead ends: 177 [2018-07-25 08:58:41,642 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-07-25 08:58:41,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-07-25 08:58:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-07-25 08:58:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-07-25 08:58:41,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-07-25 08:58:41,651 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 175 [2018-07-25 08:58:41,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:41,652 INFO L472 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-07-25 08:58:41,652 INFO L473 AbstractCegarLoop]: Interpolant automaton has 175 states. [2018-07-25 08:58:41,652 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-07-25 08:58:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-07-25 08:58:41,653 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:41,653 INFO L354 BasicCegarLoop]: trace histogram [173, 1, 1, 1] [2018-07-25 08:58:41,653 INFO L415 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:41,653 INFO L82 PathProgramCache]: Analyzing trace with hash -591696122, now seen corresponding path program 173 times [2018-07-25 08:58:41,653 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:43,691 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:43,691 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [175] total 175 [2018-07-25 08:58:43,691 INFO L451 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-07-25 08:58:43,694 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-07-25 08:58:43,695 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15400, Invalid=15400, Unknown=0, NotChecked=0, Total=30800 [2018-07-25 08:58:43,695 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 176 states. [2018-07-25 08:58:44,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:44,479 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2018-07-25 08:58:44,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2018-07-25 08:58:44,479 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 176 [2018-07-25 08:58:44,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:44,480 INFO L225 Difference]: With dead ends: 180 [2018-07-25 08:58:44,480 INFO L226 Difference]: Without dead ends: 178 [2018-07-25 08:58:44,482 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=15400, Invalid=15400, Unknown=0, NotChecked=0, Total=30800 [2018-07-25 08:58:44,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-07-25 08:58:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-07-25 08:58:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-07-25 08:58:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-07-25 08:58:44,491 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 176 [2018-07-25 08:58:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:44,491 INFO L472 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-07-25 08:58:44,491 INFO L473 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-07-25 08:58:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-07-25 08:58:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-07-25 08:58:44,492 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:44,492 INFO L354 BasicCegarLoop]: trace histogram [174, 1, 1, 1] [2018-07-25 08:58:44,492 INFO L415 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:44,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1162714464, now seen corresponding path program 174 times [2018-07-25 08:58:44,492 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 15225 backedges. 0 proven. 15225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:46,572 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:46,572 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [176] total 176 [2018-07-25 08:58:46,573 INFO L451 AbstractCegarLoop]: Interpolant automaton has 177 states [2018-07-25 08:58:46,575 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2018-07-25 08:58:46,576 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2018-07-25 08:58:46,576 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 177 states. [2018-07-25 08:58:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:47,014 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-07-25 08:58:47,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2018-07-25 08:58:47,014 INFO L78 Accepts]: Start accepts. Automaton has 177 states. Word has length 177 [2018-07-25 08:58:47,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:47,015 INFO L225 Difference]: With dead ends: 181 [2018-07-25 08:58:47,015 INFO L226 Difference]: Without dead ends: 179 [2018-07-25 08:58:47,016 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2018-07-25 08:58:47,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-07-25 08:58:47,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-07-25 08:58:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-07-25 08:58:47,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-07-25 08:58:47,024 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 177 [2018-07-25 08:58:47,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:47,024 INFO L472 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-07-25 08:58:47,024 INFO L473 AbstractCegarLoop]: Interpolant automaton has 177 states. [2018-07-25 08:58:47,024 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-07-25 08:58:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-07-25 08:58:47,025 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:47,025 INFO L354 BasicCegarLoop]: trace histogram [175, 1, 1, 1] [2018-07-25 08:58:47,025 INFO L415 AbstractCegarLoop]: === Iteration 176 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:47,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1684413882, now seen corresponding path program 175 times [2018-07-25 08:58:47,025 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:48,972 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:48,972 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [177] total 177 [2018-07-25 08:58:48,973 INFO L451 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-07-25 08:58:48,975 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-07-25 08:58:48,976 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15753, Invalid=15753, Unknown=0, NotChecked=0, Total=31506 [2018-07-25 08:58:48,976 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 178 states. [2018-07-25 08:58:49,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:49,618 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-07-25 08:58:49,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2018-07-25 08:58:49,618 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 178 [2018-07-25 08:58:49,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:49,619 INFO L225 Difference]: With dead ends: 182 [2018-07-25 08:58:49,619 INFO L226 Difference]: Without dead ends: 180 [2018-07-25 08:58:49,620 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15753, Invalid=15753, Unknown=0, NotChecked=0, Total=31506 [2018-07-25 08:58:49,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-07-25 08:58:49,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-07-25 08:58:49,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-07-25 08:58:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2018-07-25 08:58:49,628 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 178 [2018-07-25 08:58:49,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:49,628 INFO L472 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2018-07-25 08:58:49,628 INFO L473 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-07-25 08:58:49,628 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2018-07-25 08:58:49,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-07-25 08:58:49,629 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:49,629 INFO L354 BasicCegarLoop]: trace histogram [176, 1, 1, 1] [2018-07-25 08:58:49,629 INFO L415 AbstractCegarLoop]: === Iteration 177 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:49,629 INFO L82 PathProgramCache]: Analyzing trace with hash -677226656, now seen corresponding path program 176 times [2018-07-25 08:58:49,629 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 15576 backedges. 0 proven. 15576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:51,691 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:51,692 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [178] total 178 [2018-07-25 08:58:51,692 INFO L451 AbstractCegarLoop]: Interpolant automaton has 179 states [2018-07-25 08:58:51,694 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2018-07-25 08:58:51,695 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15931, Invalid=15931, Unknown=0, NotChecked=0, Total=31862 [2018-07-25 08:58:51,695 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand 179 states. [2018-07-25 08:58:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:52,081 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-07-25 08:58:52,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2018-07-25 08:58:52,082 INFO L78 Accepts]: Start accepts. Automaton has 179 states. Word has length 179 [2018-07-25 08:58:52,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:52,082 INFO L225 Difference]: With dead ends: 183 [2018-07-25 08:58:52,082 INFO L226 Difference]: Without dead ends: 181 [2018-07-25 08:58:52,084 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=15931, Invalid=15931, Unknown=0, NotChecked=0, Total=31862 [2018-07-25 08:58:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-07-25 08:58:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-07-25 08:58:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-07-25 08:58:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-07-25 08:58:52,097 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 179 [2018-07-25 08:58:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:52,097 INFO L472 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-07-25 08:58:52,098 INFO L473 AbstractCegarLoop]: Interpolant automaton has 179 states. [2018-07-25 08:58:52,098 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-07-25 08:58:52,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-07-25 08:58:52,098 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:52,098 INFO L354 BasicCegarLoop]: trace histogram [177, 1, 1, 1] [2018-07-25 08:58:52,099 INFO L415 AbstractCegarLoop]: === Iteration 178 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:52,099 INFO L82 PathProgramCache]: Analyzing trace with hash 480806278, now seen corresponding path program 177 times [2018-07-25 08:58:52,099 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:54,041 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:54,041 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [179] total 179 [2018-07-25 08:58:54,041 INFO L451 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-07-25 08:58:54,043 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-07-25 08:58:54,043 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16110, Invalid=16110, Unknown=0, NotChecked=0, Total=32220 [2018-07-25 08:58:54,044 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 180 states. [2018-07-25 08:58:54,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:54,909 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2018-07-25 08:58:54,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2018-07-25 08:58:54,910 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 180 [2018-07-25 08:58:54,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:54,910 INFO L225 Difference]: With dead ends: 184 [2018-07-25 08:58:54,910 INFO L226 Difference]: Without dead ends: 182 [2018-07-25 08:58:54,911 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=16110, Invalid=16110, Unknown=0, NotChecked=0, Total=32220 [2018-07-25 08:58:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-07-25 08:58:54,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-07-25 08:58:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-07-25 08:58:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-07-25 08:58:54,920 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 180 [2018-07-25 08:58:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:54,920 INFO L472 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-07-25 08:58:54,920 INFO L473 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-07-25 08:58:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-07-25 08:58:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-07-25 08:58:54,921 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:54,921 INFO L354 BasicCegarLoop]: trace histogram [178, 1, 1, 1] [2018-07-25 08:58:54,921 INFO L415 AbstractCegarLoop]: === Iteration 179 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:54,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2020088864, now seen corresponding path program 178 times [2018-07-25 08:58:54,921 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 15931 backedges. 0 proven. 15931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:56,974 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:56,974 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [180] total 180 [2018-07-25 08:58:56,974 INFO L451 AbstractCegarLoop]: Interpolant automaton has 181 states [2018-07-25 08:58:56,976 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2018-07-25 08:58:56,977 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16290, Invalid=16290, Unknown=0, NotChecked=0, Total=32580 [2018-07-25 08:58:56,977 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 181 states. [2018-07-25 08:58:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:58:57,235 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-07-25 08:58:57,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2018-07-25 08:58:57,235 INFO L78 Accepts]: Start accepts. Automaton has 181 states. Word has length 181 [2018-07-25 08:58:57,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:58:57,236 INFO L225 Difference]: With dead ends: 185 [2018-07-25 08:58:57,236 INFO L226 Difference]: Without dead ends: 183 [2018-07-25 08:58:57,237 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=16290, Invalid=16290, Unknown=0, NotChecked=0, Total=32580 [2018-07-25 08:58:57,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-07-25 08:58:57,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-07-25 08:58:57,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-07-25 08:58:57,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-07-25 08:58:57,246 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 181 [2018-07-25 08:58:57,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:58:57,246 INFO L472 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-07-25 08:58:57,246 INFO L473 AbstractCegarLoop]: Interpolant automaton has 181 states. [2018-07-25 08:58:57,246 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-07-25 08:58:57,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-07-25 08:58:57,247 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:58:57,247 INFO L354 BasicCegarLoop]: trace histogram [179, 1, 1, 1] [2018-07-25 08:58:57,247 INFO L415 AbstractCegarLoop]: === Iteration 180 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:58:57,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1801758522, now seen corresponding path program 179 times [2018-07-25 08:58:57,247 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:58:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:58:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:58:59,396 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:58:59,396 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [181] total 181 [2018-07-25 08:58:59,396 INFO L451 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-07-25 08:58:59,398 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-07-25 08:58:59,400 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16471, Invalid=16471, Unknown=0, NotChecked=0, Total=32942 [2018-07-25 08:58:59,400 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 182 states. [2018-07-25 08:59:00,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:00,332 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2018-07-25 08:59:00,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2018-07-25 08:59:00,332 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 182 [2018-07-25 08:59:00,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:00,333 INFO L225 Difference]: With dead ends: 186 [2018-07-25 08:59:00,333 INFO L226 Difference]: Without dead ends: 184 [2018-07-25 08:59:00,335 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=16471, Invalid=16471, Unknown=0, NotChecked=0, Total=32942 [2018-07-25 08:59:00,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-07-25 08:59:00,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-07-25 08:59:00,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-07-25 08:59:00,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-07-25 08:59:00,343 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 182 [2018-07-25 08:59:00,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:00,344 INFO L472 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-07-25 08:59:00,344 INFO L473 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-07-25 08:59:00,344 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-07-25 08:59:00,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-07-25 08:59:00,344 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:00,344 INFO L354 BasicCegarLoop]: trace histogram [180, 1, 1, 1] [2018-07-25 08:59:00,344 INFO L415 AbstractCegarLoop]: === Iteration 181 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:00,345 INFO L82 PathProgramCache]: Analyzing trace with hash -19943200, now seen corresponding path program 180 times [2018-07-25 08:59:00,345 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16290 backedges. 0 proven. 16290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:02,530 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:02,530 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [182] total 182 [2018-07-25 08:59:02,530 INFO L451 AbstractCegarLoop]: Interpolant automaton has 183 states [2018-07-25 08:59:02,532 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2018-07-25 08:59:02,533 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16653, Invalid=16653, Unknown=0, NotChecked=0, Total=33306 [2018-07-25 08:59:02,533 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 183 states. [2018-07-25 08:59:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:02,955 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-07-25 08:59:02,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2018-07-25 08:59:02,955 INFO L78 Accepts]: Start accepts. Automaton has 183 states. Word has length 183 [2018-07-25 08:59:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:02,956 INFO L225 Difference]: With dead ends: 187 [2018-07-25 08:59:02,956 INFO L226 Difference]: Without dead ends: 185 [2018-07-25 08:59:02,957 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=16653, Invalid=16653, Unknown=0, NotChecked=0, Total=33306 [2018-07-25 08:59:02,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-07-25 08:59:02,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-07-25 08:59:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-07-25 08:59:02,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-07-25 08:59:02,971 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 183 [2018-07-25 08:59:02,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:02,971 INFO L472 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-07-25 08:59:02,971 INFO L473 AbstractCegarLoop]: Interpolant automaton has 183 states. [2018-07-25 08:59:02,972 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-07-25 08:59:02,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-07-25 08:59:02,972 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:02,972 INFO L354 BasicCegarLoop]: trace histogram [181, 1, 1, 1] [2018-07-25 08:59:02,973 INFO L415 AbstractCegarLoop]: === Iteration 182 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:02,973 INFO L82 PathProgramCache]: Analyzing trace with hash -618243066, now seen corresponding path program 181 times [2018-07-25 08:59:02,973 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:05,197 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:05,197 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [183] total 183 [2018-07-25 08:59:05,197 INFO L451 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-07-25 08:59:05,200 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-07-25 08:59:05,201 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16836, Invalid=16836, Unknown=0, NotChecked=0, Total=33672 [2018-07-25 08:59:05,202 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 184 states. [2018-07-25 08:59:05,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:05,929 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2018-07-25 08:59:05,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2018-07-25 08:59:05,930 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 184 [2018-07-25 08:59:05,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:05,930 INFO L225 Difference]: With dead ends: 188 [2018-07-25 08:59:05,930 INFO L226 Difference]: Without dead ends: 186 [2018-07-25 08:59:05,932 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=16836, Invalid=16836, Unknown=0, NotChecked=0, Total=33672 [2018-07-25 08:59:05,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-07-25 08:59:05,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-07-25 08:59:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-07-25 08:59:05,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2018-07-25 08:59:05,942 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 184 [2018-07-25 08:59:05,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:05,942 INFO L472 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2018-07-25 08:59:05,942 INFO L473 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-07-25 08:59:05,942 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2018-07-25 08:59:05,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-07-25 08:59:05,942 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:05,943 INFO L354 BasicCegarLoop]: trace histogram [182, 1, 1, 1] [2018-07-25 08:59:05,943 INFO L415 AbstractCegarLoop]: === Iteration 183 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:05,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1985669728, now seen corresponding path program 182 times [2018-07-25 08:59:05,943 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16653 backedges. 0 proven. 16653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:08,186 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:08,186 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [184] total 184 [2018-07-25 08:59:08,186 INFO L451 AbstractCegarLoop]: Interpolant automaton has 185 states [2018-07-25 08:59:08,189 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2018-07-25 08:59:08,191 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17020, Invalid=17020, Unknown=0, NotChecked=0, Total=34040 [2018-07-25 08:59:08,191 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand 185 states. [2018-07-25 08:59:09,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:09,280 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-07-25 08:59:09,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2018-07-25 08:59:09,280 INFO L78 Accepts]: Start accepts. Automaton has 185 states. Word has length 185 [2018-07-25 08:59:09,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:09,280 INFO L225 Difference]: With dead ends: 189 [2018-07-25 08:59:09,280 INFO L226 Difference]: Without dead ends: 187 [2018-07-25 08:59:09,282 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=17020, Invalid=17020, Unknown=0, NotChecked=0, Total=34040 [2018-07-25 08:59:09,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-07-25 08:59:09,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-07-25 08:59:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-07-25 08:59:09,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-07-25 08:59:09,292 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 185 [2018-07-25 08:59:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:09,292 INFO L472 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-07-25 08:59:09,292 INFO L473 AbstractCegarLoop]: Interpolant automaton has 185 states. [2018-07-25 08:59:09,292 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-07-25 08:59:09,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-07-25 08:59:09,293 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:09,293 INFO L354 BasicCegarLoop]: trace histogram [183, 1, 1, 1] [2018-07-25 08:59:09,293 INFO L415 AbstractCegarLoop]: === Iteration 184 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:09,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1426223290, now seen corresponding path program 183 times [2018-07-25 08:59:09,293 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:11,544 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:11,544 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [185] total 185 [2018-07-25 08:59:11,545 INFO L451 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-07-25 08:59:11,546 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-07-25 08:59:11,546 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17205, Invalid=17205, Unknown=0, NotChecked=0, Total=34410 [2018-07-25 08:59:11,546 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 186 states. [2018-07-25 08:59:11,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:11,831 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2018-07-25 08:59:11,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2018-07-25 08:59:11,831 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 186 [2018-07-25 08:59:11,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:11,831 INFO L225 Difference]: With dead ends: 190 [2018-07-25 08:59:11,831 INFO L226 Difference]: Without dead ends: 188 [2018-07-25 08:59:11,832 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=17205, Invalid=17205, Unknown=0, NotChecked=0, Total=34410 [2018-07-25 08:59:11,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-07-25 08:59:11,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-07-25 08:59:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-07-25 08:59:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-07-25 08:59:11,841 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 186 [2018-07-25 08:59:11,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:11,841 INFO L472 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-07-25 08:59:11,841 INFO L473 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-07-25 08:59:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-07-25 08:59:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-07-25 08:59:11,841 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:11,841 INFO L354 BasicCegarLoop]: trace histogram [184, 1, 1, 1] [2018-07-25 08:59:11,842 INFO L415 AbstractCegarLoop]: === Iteration 185 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:11,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1263252896, now seen corresponding path program 184 times [2018-07-25 08:59:11,842 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17020 backedges. 0 proven. 17020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:13,925 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:13,926 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [186] total 186 [2018-07-25 08:59:13,926 INFO L451 AbstractCegarLoop]: Interpolant automaton has 187 states [2018-07-25 08:59:13,928 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 187 interpolants. [2018-07-25 08:59:13,930 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17391, Invalid=17391, Unknown=0, NotChecked=0, Total=34782 [2018-07-25 08:59:13,930 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 187 states. [2018-07-25 08:59:14,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:14,713 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-07-25 08:59:14,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2018-07-25 08:59:14,713 INFO L78 Accepts]: Start accepts. Automaton has 187 states. Word has length 187 [2018-07-25 08:59:14,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:14,713 INFO L225 Difference]: With dead ends: 191 [2018-07-25 08:59:14,714 INFO L226 Difference]: Without dead ends: 189 [2018-07-25 08:59:14,715 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=17391, Invalid=17391, Unknown=0, NotChecked=0, Total=34782 [2018-07-25 08:59:14,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-07-25 08:59:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-07-25 08:59:14,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-07-25 08:59:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-07-25 08:59:14,726 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 187 [2018-07-25 08:59:14,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:14,726 INFO L472 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-07-25 08:59:14,726 INFO L473 AbstractCegarLoop]: Interpolant automaton has 187 states. [2018-07-25 08:59:14,726 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-07-25 08:59:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-07-25 08:59:14,726 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:14,726 INFO L354 BasicCegarLoop]: trace histogram [185, 1, 1, 1] [2018-07-25 08:59:14,727 INFO L415 AbstractCegarLoop]: === Iteration 186 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:14,727 INFO L82 PathProgramCache]: Analyzing trace with hash -506137978, now seen corresponding path program 185 times [2018-07-25 08:59:14,727 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:17,051 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:17,051 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [187] total 187 [2018-07-25 08:59:17,051 INFO L451 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-07-25 08:59:17,054 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-07-25 08:59:17,055 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17578, Invalid=17578, Unknown=0, NotChecked=0, Total=35156 [2018-07-25 08:59:17,055 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 188 states. [2018-07-25 08:59:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:18,217 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2018-07-25 08:59:18,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2018-07-25 08:59:18,217 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 188 [2018-07-25 08:59:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:18,218 INFO L225 Difference]: With dead ends: 192 [2018-07-25 08:59:18,218 INFO L226 Difference]: Without dead ends: 190 [2018-07-25 08:59:18,220 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=17578, Invalid=17578, Unknown=0, NotChecked=0, Total=35156 [2018-07-25 08:59:18,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-07-25 08:59:18,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-07-25 08:59:18,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-07-25 08:59:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2018-07-25 08:59:18,230 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 188 [2018-07-25 08:59:18,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:18,230 INFO L472 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2018-07-25 08:59:18,230 INFO L473 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-07-25 08:59:18,230 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2018-07-25 08:59:18,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-07-25 08:59:18,231 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:18,231 INFO L354 BasicCegarLoop]: trace histogram [186, 1, 1, 1] [2018-07-25 08:59:18,231 INFO L415 AbstractCegarLoop]: === Iteration 187 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:18,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1489588000, now seen corresponding path program 186 times [2018-07-25 08:59:18,231 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 17391 backedges. 0 proven. 17391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:20,598 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:20,598 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [188] total 188 [2018-07-25 08:59:20,598 INFO L451 AbstractCegarLoop]: Interpolant automaton has 189 states [2018-07-25 08:59:20,600 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2018-07-25 08:59:20,601 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17766, Invalid=17766, Unknown=0, NotChecked=0, Total=35532 [2018-07-25 08:59:20,601 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand 189 states. [2018-07-25 08:59:21,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:21,117 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-07-25 08:59:21,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2018-07-25 08:59:21,117 INFO L78 Accepts]: Start accepts. Automaton has 189 states. Word has length 189 [2018-07-25 08:59:21,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:21,117 INFO L225 Difference]: With dead ends: 193 [2018-07-25 08:59:21,117 INFO L226 Difference]: Without dead ends: 191 [2018-07-25 08:59:21,118 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=17766, Invalid=17766, Unknown=0, NotChecked=0, Total=35532 [2018-07-25 08:59:21,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-07-25 08:59:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-07-25 08:59:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-07-25 08:59:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-07-25 08:59:21,127 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 189 [2018-07-25 08:59:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:21,127 INFO L472 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-07-25 08:59:21,127 INFO L473 AbstractCegarLoop]: Interpolant automaton has 189 states. [2018-07-25 08:59:21,127 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-07-25 08:59:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-07-25 08:59:21,128 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:21,128 INFO L354 BasicCegarLoop]: trace histogram [187, 1, 1, 1] [2018-07-25 08:59:21,128 INFO L415 AbstractCegarLoop]: === Iteration 188 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:21,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1067416122, now seen corresponding path program 187 times [2018-07-25 08:59:21,128 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:23,405 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:23,405 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [189] total 189 [2018-07-25 08:59:23,406 INFO L451 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-07-25 08:59:23,408 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-07-25 08:59:23,410 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17955, Invalid=17955, Unknown=0, NotChecked=0, Total=35910 [2018-07-25 08:59:23,410 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 190 states. [2018-07-25 08:59:23,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:23,837 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-07-25 08:59:23,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2018-07-25 08:59:23,837 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 190 [2018-07-25 08:59:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:23,838 INFO L225 Difference]: With dead ends: 194 [2018-07-25 08:59:23,838 INFO L226 Difference]: Without dead ends: 192 [2018-07-25 08:59:23,840 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=17955, Invalid=17955, Unknown=0, NotChecked=0, Total=35910 [2018-07-25 08:59:23,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-07-25 08:59:23,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-07-25 08:59:23,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-07-25 08:59:23,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2018-07-25 08:59:23,849 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 190 [2018-07-25 08:59:23,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:23,850 INFO L472 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2018-07-25 08:59:23,850 INFO L473 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-07-25 08:59:23,850 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2018-07-25 08:59:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-07-25 08:59:23,850 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:23,850 INFO L354 BasicCegarLoop]: trace histogram [188, 1, 1, 1] [2018-07-25 08:59:23,851 INFO L415 AbstractCegarLoop]: === Iteration 189 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:23,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1269834720, now seen corresponding path program 188 times [2018-07-25 08:59:23,851 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17766 backedges. 0 proven. 17766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:26,288 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:26,289 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [190] total 190 [2018-07-25 08:59:26,289 INFO L451 AbstractCegarLoop]: Interpolant automaton has 191 states [2018-07-25 08:59:26,291 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2018-07-25 08:59:26,293 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18145, Invalid=18145, Unknown=0, NotChecked=0, Total=36290 [2018-07-25 08:59:26,293 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 191 states. [2018-07-25 08:59:27,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:27,359 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-07-25 08:59:27,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2018-07-25 08:59:27,359 INFO L78 Accepts]: Start accepts. Automaton has 191 states. Word has length 191 [2018-07-25 08:59:27,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:27,360 INFO L225 Difference]: With dead ends: 195 [2018-07-25 08:59:27,360 INFO L226 Difference]: Without dead ends: 193 [2018-07-25 08:59:27,362 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=18145, Invalid=18145, Unknown=0, NotChecked=0, Total=36290 [2018-07-25 08:59:27,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-07-25 08:59:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-07-25 08:59:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-07-25 08:59:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-07-25 08:59:27,378 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 191 [2018-07-25 08:59:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:27,378 INFO L472 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-07-25 08:59:27,378 INFO L473 AbstractCegarLoop]: Interpolant automaton has 191 states. [2018-07-25 08:59:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-07-25 08:59:27,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-07-25 08:59:27,379 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:27,379 INFO L354 BasicCegarLoop]: trace histogram [189, 1, 1, 1] [2018-07-25 08:59:27,379 INFO L415 AbstractCegarLoop]: === Iteration 190 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:27,379 INFO L82 PathProgramCache]: Analyzing trace with hash 710166790, now seen corresponding path program 189 times [2018-07-25 08:59:27,379 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:29,834 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:29,834 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [191] total 191 [2018-07-25 08:59:29,834 INFO L451 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-07-25 08:59:29,836 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-07-25 08:59:29,837 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2018-07-25 08:59:29,837 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 192 states. [2018-07-25 08:59:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:31,069 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2018-07-25 08:59:31,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2018-07-25 08:59:31,070 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 192 [2018-07-25 08:59:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:31,070 INFO L225 Difference]: With dead ends: 196 [2018-07-25 08:59:31,070 INFO L226 Difference]: Without dead ends: 194 [2018-07-25 08:59:31,072 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2018-07-25 08:59:31,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-07-25 08:59:31,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-07-25 08:59:31,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-07-25 08:59:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-07-25 08:59:31,085 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 192 [2018-07-25 08:59:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:31,085 INFO L472 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-07-25 08:59:31,086 INFO L473 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-07-25 08:59:31,086 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-07-25 08:59:31,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-07-25 08:59:31,086 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:31,086 INFO L354 BasicCegarLoop]: trace histogram [190, 1, 1, 1] [2018-07-25 08:59:31,086 INFO L415 AbstractCegarLoop]: === Iteration 191 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:31,087 INFO L82 PathProgramCache]: Analyzing trace with hash 540330144, now seen corresponding path program 190 times [2018-07-25 08:59:31,087 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:33,523 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:33,523 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [192] total 192 [2018-07-25 08:59:33,523 INFO L451 AbstractCegarLoop]: Interpolant automaton has 193 states [2018-07-25 08:59:33,526 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2018-07-25 08:59:33,527 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-07-25 08:59:33,527 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 193 states. [2018-07-25 08:59:34,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:34,211 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-07-25 08:59:34,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2018-07-25 08:59:34,211 INFO L78 Accepts]: Start accepts. Automaton has 193 states. Word has length 193 [2018-07-25 08:59:34,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:34,212 INFO L225 Difference]: With dead ends: 197 [2018-07-25 08:59:34,212 INFO L226 Difference]: Without dead ends: 195 [2018-07-25 08:59:34,213 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-07-25 08:59:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-07-25 08:59:34,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-07-25 08:59:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-07-25 08:59:34,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-07-25 08:59:34,221 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 193 [2018-07-25 08:59:34,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:34,222 INFO L472 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-07-25 08:59:34,222 INFO L473 AbstractCegarLoop]: Interpolant automaton has 193 states. [2018-07-25 08:59:34,222 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-07-25 08:59:34,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-07-25 08:59:34,222 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:34,222 INFO L354 BasicCegarLoop]: trace histogram [191, 1, 1, 1] [2018-07-25 08:59:34,223 INFO L415 AbstractCegarLoop]: === Iteration 192 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:34,223 INFO L82 PathProgramCache]: Analyzing trace with hash -429638586, now seen corresponding path program 191 times [2018-07-25 08:59:34,223 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:36,600 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:36,600 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [193] total 193 [2018-07-25 08:59:36,601 INFO L451 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-07-25 08:59:36,604 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-07-25 08:59:36,606 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18721, Invalid=18721, Unknown=0, NotChecked=0, Total=37442 [2018-07-25 08:59:36,606 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 194 states. [2018-07-25 08:59:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:37,029 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2018-07-25 08:59:37,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2018-07-25 08:59:37,029 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 194 [2018-07-25 08:59:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:37,030 INFO L225 Difference]: With dead ends: 198 [2018-07-25 08:59:37,030 INFO L226 Difference]: Without dead ends: 196 [2018-07-25 08:59:37,032 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=18721, Invalid=18721, Unknown=0, NotChecked=0, Total=37442 [2018-07-25 08:59:37,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-07-25 08:59:37,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-07-25 08:59:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-07-25 08:59:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-07-25 08:59:37,041 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 194 [2018-07-25 08:59:37,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:37,041 INFO L472 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-07-25 08:59:37,041 INFO L473 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-07-25 08:59:37,041 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-07-25 08:59:37,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-07-25 08:59:37,042 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:37,042 INFO L354 BasicCegarLoop]: trace histogram [192, 1, 1, 1] [2018-07-25 08:59:37,042 INFO L415 AbstractCegarLoop]: === Iteration 193 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:37,043 INFO L82 PathProgramCache]: Analyzing trace with hash -433898144, now seen corresponding path program 192 times [2018-07-25 08:59:37,043 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18528 backedges. 0 proven. 18528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:39,376 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:39,376 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [194] total 194 [2018-07-25 08:59:39,376 INFO L451 AbstractCegarLoop]: Interpolant automaton has 195 states [2018-07-25 08:59:39,379 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2018-07-25 08:59:39,380 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18915, Invalid=18915, Unknown=0, NotChecked=0, Total=37830 [2018-07-25 08:59:39,380 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 195 states. [2018-07-25 08:59:39,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:39,886 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-07-25 08:59:39,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2018-07-25 08:59:39,887 INFO L78 Accepts]: Start accepts. Automaton has 195 states. Word has length 195 [2018-07-25 08:59:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:39,887 INFO L225 Difference]: With dead ends: 199 [2018-07-25 08:59:39,887 INFO L226 Difference]: Without dead ends: 197 [2018-07-25 08:59:39,889 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=18915, Invalid=18915, Unknown=0, NotChecked=0, Total=37830 [2018-07-25 08:59:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-07-25 08:59:39,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-07-25 08:59:39,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-07-25 08:59:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-07-25 08:59:39,899 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 195 [2018-07-25 08:59:39,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:39,900 INFO L472 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-07-25 08:59:39,900 INFO L473 AbstractCegarLoop]: Interpolant automaton has 195 states. [2018-07-25 08:59:39,900 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-07-25 08:59:39,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-07-25 08:59:39,900 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:39,901 INFO L354 BasicCegarLoop]: trace histogram [193, 1, 1, 1] [2018-07-25 08:59:39,901 INFO L415 AbstractCegarLoop]: === Iteration 194 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:39,901 INFO L82 PathProgramCache]: Analyzing trace with hash -565944442, now seen corresponding path program 193 times [2018-07-25 08:59:39,901 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:42,422 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:42,423 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [195] total 195 [2018-07-25 08:59:42,423 INFO L451 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-07-25 08:59:42,424 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-07-25 08:59:42,425 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19110, Invalid=19110, Unknown=0, NotChecked=0, Total=38220 [2018-07-25 08:59:42,425 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 196 states. [2018-07-25 08:59:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:43,097 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2018-07-25 08:59:43,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2018-07-25 08:59:43,097 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 196 [2018-07-25 08:59:43,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:43,098 INFO L225 Difference]: With dead ends: 200 [2018-07-25 08:59:43,098 INFO L226 Difference]: Without dead ends: 198 [2018-07-25 08:59:43,099 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=19110, Invalid=19110, Unknown=0, NotChecked=0, Total=38220 [2018-07-25 08:59:43,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-07-25 08:59:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-07-25 08:59:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-07-25 08:59:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-07-25 08:59:43,114 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 196 [2018-07-25 08:59:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:43,115 INFO L472 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-07-25 08:59:43,115 INFO L473 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-07-25 08:59:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-07-25 08:59:43,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-07-25 08:59:43,115 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:43,116 INFO L354 BasicCegarLoop]: trace histogram [194, 1, 1, 1] [2018-07-25 08:59:43,116 INFO L415 AbstractCegarLoop]: === Iteration 195 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:43,116 INFO L82 PathProgramCache]: Analyzing trace with hash -364412384, now seen corresponding path program 194 times [2018-07-25 08:59:43,116 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18915 backedges. 0 proven. 18915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:45,462 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:45,462 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [196] total 196 [2018-07-25 08:59:45,462 INFO L451 AbstractCegarLoop]: Interpolant automaton has 197 states [2018-07-25 08:59:45,465 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2018-07-25 08:59:45,467 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2018-07-25 08:59:45,467 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 197 states. [2018-07-25 08:59:46,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:46,523 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-07-25 08:59:46,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2018-07-25 08:59:46,523 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 197 [2018-07-25 08:59:46,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:46,523 INFO L225 Difference]: With dead ends: 201 [2018-07-25 08:59:46,523 INFO L226 Difference]: Without dead ends: 199 [2018-07-25 08:59:46,525 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2018-07-25 08:59:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-07-25 08:59:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-07-25 08:59:46,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-07-25 08:59:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-07-25 08:59:46,534 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 197 [2018-07-25 08:59:46,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:46,534 INFO L472 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-07-25 08:59:46,534 INFO L473 AbstractCegarLoop]: Interpolant automaton has 197 states. [2018-07-25 08:59:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-07-25 08:59:46,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-07-25 08:59:46,535 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:46,535 INFO L354 BasicCegarLoop]: trace histogram [195, 1, 1, 1] [2018-07-25 08:59:46,535 INFO L415 AbstractCegarLoop]: === Iteration 196 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:46,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1588114118, now seen corresponding path program 195 times [2018-07-25 08:59:46,535 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:49,099 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:49,099 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [197] total 197 [2018-07-25 08:59:49,100 INFO L451 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-07-25 08:59:49,102 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-07-25 08:59:49,104 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19503, Invalid=19503, Unknown=0, NotChecked=0, Total=39006 [2018-07-25 08:59:49,104 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 198 states. [2018-07-25 08:59:50,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:50,529 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-07-25 08:59:50,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2018-07-25 08:59:50,530 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 198 [2018-07-25 08:59:50,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:50,530 INFO L225 Difference]: With dead ends: 202 [2018-07-25 08:59:50,530 INFO L226 Difference]: Without dead ends: 200 [2018-07-25 08:59:50,532 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=19503, Invalid=19503, Unknown=0, NotChecked=0, Total=39006 [2018-07-25 08:59:50,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-07-25 08:59:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-07-25 08:59:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-07-25 08:59:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2018-07-25 08:59:50,541 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 198 [2018-07-25 08:59:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:50,541 INFO L472 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2018-07-25 08:59:50,541 INFO L473 AbstractCegarLoop]: Interpolant automaton has 198 states. [2018-07-25 08:59:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2018-07-25 08:59:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-07-25 08:59:50,542 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:50,542 INFO L354 BasicCegarLoop]: trace histogram [196, 1, 1, 1] [2018-07-25 08:59:50,542 INFO L415 AbstractCegarLoop]: === Iteration 197 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1986893536, now seen corresponding path program 196 times [2018-07-25 08:59:50,542 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 19306 backedges. 0 proven. 19306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:53,008 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:53,008 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [198] total 198 [2018-07-25 08:59:53,008 INFO L451 AbstractCegarLoop]: Interpolant automaton has 199 states [2018-07-25 08:59:53,011 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2018-07-25 08:59:53,012 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2018-07-25 08:59:53,012 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 199 states. [2018-07-25 08:59:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:54,461 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-07-25 08:59:54,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2018-07-25 08:59:54,461 INFO L78 Accepts]: Start accepts. Automaton has 199 states. Word has length 199 [2018-07-25 08:59:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:54,462 INFO L225 Difference]: With dead ends: 203 [2018-07-25 08:59:54,462 INFO L226 Difference]: Without dead ends: 201 [2018-07-25 08:59:54,464 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2018-07-25 08:59:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-07-25 08:59:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-07-25 08:59:54,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-07-25 08:59:54,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-07-25 08:59:54,479 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 199 [2018-07-25 08:59:54,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:54,480 INFO L472 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-07-25 08:59:54,480 INFO L473 AbstractCegarLoop]: Interpolant automaton has 199 states. [2018-07-25 08:59:54,480 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-07-25 08:59:54,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-07-25 08:59:54,481 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:54,481 INFO L354 BasicCegarLoop]: trace histogram [197, 1, 1, 1] [2018-07-25 08:59:54,481 INFO L415 AbstractCegarLoop]: === Iteration 198 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:54,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1464153606, now seen corresponding path program 197 times [2018-07-25 08:59:54,481 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:59:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:59:57,104 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:59:57,104 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [199] total 199 [2018-07-25 08:59:57,104 INFO L451 AbstractCegarLoop]: Interpolant automaton has 200 states [2018-07-25 08:59:57,107 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2018-07-25 08:59:57,108 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19900, Invalid=19900, Unknown=0, NotChecked=0, Total=39800 [2018-07-25 08:59:57,108 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 200 states. [2018-07-25 08:59:58,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:59:58,358 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2018-07-25 08:59:58,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2018-07-25 08:59:58,358 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 200 [2018-07-25 08:59:58,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:59:58,359 INFO L225 Difference]: With dead ends: 204 [2018-07-25 08:59:58,359 INFO L226 Difference]: Without dead ends: 202 [2018-07-25 08:59:58,360 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=19900, Invalid=19900, Unknown=0, NotChecked=0, Total=39800 [2018-07-25 08:59:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-07-25 08:59:58,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-07-25 08:59:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-07-25 08:59:58,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2018-07-25 08:59:58,370 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 200 [2018-07-25 08:59:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:59:58,370 INFO L472 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2018-07-25 08:59:58,370 INFO L473 AbstractCegarLoop]: Interpolant automaton has 200 states. [2018-07-25 08:59:58,370 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2018-07-25 08:59:58,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-07-25 08:59:58,370 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:59:58,371 INFO L354 BasicCegarLoop]: trace histogram [198, 1, 1, 1] [2018-07-25 08:59:58,371 INFO L415 AbstractCegarLoop]: === Iteration 199 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:59:58,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1855882336, now seen corresponding path program 198 times [2018-07-25 08:59:58,371 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:59:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 09:00:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 19701 backedges. 0 proven. 19701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 09:00:00,923 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 09:00:00,923 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [200] total 200 [2018-07-25 09:00:00,923 INFO L451 AbstractCegarLoop]: Interpolant automaton has 201 states [2018-07-25 09:00:00,926 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2018-07-25 09:00:00,928 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20100, Invalid=20100, Unknown=0, NotChecked=0, Total=40200 [2018-07-25 09:00:00,928 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 201 states. Received shutdown request... [2018-07-25 09:00:01,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-07-25 09:00:01,313 WARN L541 AbstractCegarLoop]: Verification canceled [2018-07-25 09:00:01,319 WARN L202 ceAbstractionStarter]: Timeout [2018-07-25 09:00:01,320 INFO L202 PluginConnector]: Adding new model Sandman01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.07 09:00:01 BoogieIcfgContainer [2018-07-25 09:00:01,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-25 09:00:01,323 INFO L168 Benchmark]: Toolchain (without parser) took 246678.46 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: -1.9 GB). Peak memory consumption was 145.2 MB. Max. memory is 7.1 GB. [2018-07-25 09:00:01,325 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-25 09:00:01,325 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.72 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-25 09:00:01,326 INFO L168 Benchmark]: Boogie Preprocessor took 19.77 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-25 09:00:01,326 INFO L168 Benchmark]: RCFGBuilder took 245.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-25 09:00:01,328 INFO L168 Benchmark]: TraceAbstraction took 246361.74 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: -1.9 GB). Peak memory consumption was 134.6 MB. Max. memory is 7.1 GB. [2018-07-25 09:00:01,332 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 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.72 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.77 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 245.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 246361.74 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: -1.9 GB). Peak memory consumption was 134.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 30). Cancelled while BasicCegarLoop was constructing difference of abstraction (202states) and interpolant automaton (currently 146 states, 201 states before enhancement), while ReachableStatesComputation was computing reachable states (144 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 246.2s OverallTime, 199 OverallIterations, 198 TraceHistogramMax, 45.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 597 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 43329 SolverSat, 349 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20099 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 19900 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 153.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=202occurred in iteration=198, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 198 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 23.0s SatisfiabilityAnalysisTime, 169.2s InterpolantComputationTime, 20298 NumberOfCodeBlocks, 20298 NumberOfCodeBlocksAsserted, 199 NumberOfCheckSat, 20099 ConstructedInterpolants, 0 QuantifiedInterpolants, 24039596 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 199 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1313400 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/Sandman01.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-07-25_09-00-01-347.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Sandman01.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-25_09-00-01-347.csv Completed graceful shutdown